How Much Salt in Pasta Water? Grams per Litre, Not Folklore

Single ceramic seasoning jar used for sugar on a warm coffee bar

How much salt in pasta water? Ten grams per litre of water, which is a 1% brine, and 7 to 12 g per litre is the whole sensible range. That is roughly 3/4 tablespoon of fine salt for every 1 litre (about 1 quart), so a 4-litre pot for 1 lb (454 g) of dried pasta takes around 40 g, and a 3-litre pot takes about 30 g.

The 'salt it like the sea' line is why your pasta swings between bland and briny. Real seawater runs 35 g per litre, three and a half times the target, and nobody who repeats the phrase actually cooks in it. The fix is a number, a scale for the first time, and then a jar with a fixed scoop next to the range so the second time needs no scale at all. The Houseland ceramic seasoning jar holds about 300 ml and ships with a 3.2 in (8.2 cm) spoon, which is the kind of fixed measure this method is built on.

Two ceramic seasoning jars on a bamboo tray at a kitchen prep station
PicturedSalt Cellar With Spoon, Ceramic Seasoning Jar With Bamboo Lid.See 3 set sizes & current price

How much salt in pasta water do you actually need?

Ten grams of salt for every 1 litre of water is the number Italian cooks give when you ask for a figure instead of a feeling. Appetito magazine put the question to a group of chefs and Fabrizio Facchini answered with exactly that: 10 g, about 3/4 tablespoon, per litre, which he rounds to roughly 1 quart. Whatsinthepan.com lands in the same place with 8 to 10 g per litre and works it out for a full pot: 1 lb (454 g) of pasta in 3 litres of water wants around 30 g of salt.

The spread between cooks is smaller than the folklore suggests. Michele Di Pietro, in the same Appetito piece, uses 1 1/2 to 2 tablespoons of fine salt for 6 quarts (5.7 L) with 1 lb of pasta, which is the low end, near 5 g per litre. The Flour + Water restaurant figure of 1/4 cup per 4 quarts (3.8 L) is the high end. Every one of those answers sits between 0.5% and 1.5% by weight. None of them is anywhere near the sea.

Pot Water Salt at 1% Salt at 0.7% (salty sauce)
Small, 1 to 2 servings 2 L (2.1 qt) 20 g 14 g
Standard, 1 lb (454 g) dried 4 L (4.2 qt) 40 g 28 g
Big stockpot 6 L (6.3 qt) 60 g 42 g

Weigh the salt once on a kitchen scale and look at the pile. That volume, in whatever scoop you keep by the stove, is your measure from then on. If you have ever had to rescue a pot that went too salty, you already know why the first time is worth a scale.

Why does 'salty like the sea' give you briny pasta?

Seawater is about 35 g of salt per litre, a 3.5% solution, and pasta water at that strength tastes like a mouthful of the Atlantic. The Wikipedia entry on seawater gives the average ocean salinity as 3.5%, or 35 g per litre. Cook a 4-litre pot 'like the sea' and you have tipped in 140 g of salt, a whole quarter of a 500 g box, where 40 g would have done.

The phrase survives because most people never measure their own sea. They pour until it looks like a lot, taste water that is merely pleasant, and call it seawater. The ones who take it literally, and use a full 1/2 cup or more in a household pot, get the briny result the recipe warned against. The Polish mineral study on cooked pasta in PMC shows how much of that salt actually rides along: pasta boiled in salted water and not rinsed held nearly 5 times the sodium of pasta boiled in plain water. Whatever you put in the pot, a real share of it ends up on the plate, so 3.5 times too much salt in the water is 3.5 times too much salt in dinner.

Liquid Salt per litre Percent by weight Result on pasta
Plain tap water 0 g 0% Bland inside, sauce does all the work
Pasta water, target 10 g 1% Seasoned through, sauce can stay lighter
'Like the sea', literal 35 g 3.5% Briny, and a salty sauce makes it worse
Close view of ceramic seasoning jar with bamboo lid open and spoon lifting salt
PicturedSalt Cellar With Spoon, Ceramic Seasoning Jar With Bamboo Lid.See 3 set sizes & current price

How do you measure 10 g without a scale?

You cannot convert grams to spoons without knowing which salt is in the spoon, because a teaspoon of fine salt and a teaspoon of flaky kosher salt are different weights. The volume is fixed by law: 21 CFR 101.9 defines a teaspoon as 5 mL and a tablespoon as 15 mL. What changes is how much air sits between the crystals. Morton's own conversion chart says 1 teaspoon of table salt equals 1 1/4 teaspoons of its coarse kosher salt, while its coarse sea salt swaps 1:1 with table salt. Diamond Crystal kosher is lighter still, which is why whatsinthepan.com gives 3 to 4 tablespoons of it for 4 quarts (3.8 L) where fine salt needs about half that.

  1. Weigh 10 g of the salt you actually use on a kitchen scale, once. If the scale only reads in 1 g steps that is fine; 9 to 11 g changes nothing you can taste.
  2. Tip that 10 g into the scoop you keep by the stove and note where it comes to. With a 3.2 in (8.2 cm) ceramic spoon that is usually a rounded scoop of fine salt or a heaped one of kosher.
  3. Count scoops per litre from then on. A 4-litre pot gets 4 scoops. Stop reading the recipe's teaspoons; they were written for someone else's salt.
  4. Taste the water after the salt dissolves and before the pasta goes in, the check Appetito's chefs use. It should taste clearly seasoned, like a well-made broth, not like brine.

A rule of thumb from Facchini's 10 g = 3/4 tablespoon figure: for fine table salt, 10 g is about 2 1/4 teaspoons, so 1 litre of water wants 2 to 2 1/2 teaspoons and 4 litres wants about 3 tablespoons. For Morton kosher add a quarter again. For Diamond Crystal roughly double it. Keeping one salt in the pot-side jar removes the whole conversion problem, which is the real reason chefs salt from an open cellar with their fingers rather than from a shaker.

Three ceramic seasoning jars on a bamboo tray in a warm kitchen counter scene

From the shop

Salt Cellar With Spoon, Ceramic Seasoning Jar With Bamboo Lid

Each ceramic jar holds about 300 ml and ships with a 3.2 in (8.2 cm) spoon, so the scoop you calibrate once stays with the salt. The bamboo lid and tray are hand wash only and should sit clear of steam.

View the ceramic salt cellar — 3 set sizes & current price

Does the sauce or the pasta change the number?

Drop to about 7 g per litre when the sauce is already salty, and hold at 10 g or slightly above for fresh pasta, which spends far less time in the water. Pecorino, anchovy, cured pork, capers and olives all bring their own sodium, so a carbonara or a puttanesca wants the water at the low end of the range. A plain tomato sauce or brown butter has nothing to add, so the water does the seasoning and 10 g is right.

Fresh egg pasta cooks in 2 to 4 minutes instead of 9 to 12, and the Appetito chefs note it needs more salt in the water for exactly that reason: there is less time for the pasta to take it up. If you make sheets at home and roll them on a steel board, salt the water at the full 10 g per litre and do not go lower.

  • Salty sauce (cheese, cured meat, anchovy): 7 g per litre, about 1 1/2 teaspoons of fine salt.
  • Neutral sauce (tomato, butter, oil and garlic): 10 g per litre, about 2 1/4 teaspoons.
  • Fresh pasta, any sauce: 10 to 12 g per litre, because it is out of the pot in minutes.
  • Pasta salad, served cold: 10 g per litre; cold food reads less salty than hot, and you cannot fix it later.

Sodium matters if you are watching it. The US Daily Value in 21 CFR 101.9 is 2,300 mg, and the PMC pasta study is blunt that unsalted water and no rinse is the lowest-sodium way to cook it. Salting the water is a flavour choice, so if a doctor has told you to cut sodium, season the sauce instead and skip the pot salt entirely.

Three ceramic spice jars organized on a warm pantry shelf
PicturedSalt Cellar With Spoon, Ceramic Seasoning Jar With Bamboo Lid.See 3 set sizes & current price

What I'd do

Keep one salt, in one jar, with one scoop, beside the pot, and never convert again. The scale comes out exactly once, to find what 10 g looks like in that scoop. After that a 4-litre pot is four scoops and a 2-litre pot is two, and the number is the same on a Tuesday as it was on Sunday.

This is what the ceramic seasoning jar in the Houseland kitchen and home collection is for. Each jar is about 4.1 in (10.5 cm) wide and 3.6 in (9.2 cm) high, holds about 300 ml, and comes with its own 3.2 in (8.2 cm) spoon, so the scoop lives with the salt and does not wander off into the sugar. The mouth is wide enough to pinch from when you are finishing a sauce, which is the salt cellar or salt pig job the same jar covers at the table. A bamboo flip lid keeps steam out between uses, and the 2 and 3 jar sets add a bamboo tray if you want sugar for the coffee station and chilli flakes for the board in the same row.

Two honest limits. The lid and tray are bamboo, so the Houseland jar should sit a step back from the pot rather than in the steam, and the body, spoon and lid are hand wash only. If you want a dishwasher-safe canister, this is not it. If you want a fixed measure of dry salt at arm's length from the stove, 300 ml is about 300 g of fine salt, or thirty pots at 10 g, before a refill.

Questions people ask about this

Is 1 tablespoon of salt per litre too much for pasta water?

Yes for fine salt. A level tablespoon of table salt is around 17 to 18 g, close to double the 10 g per litre target and heading toward 2% brine. A tablespoon of Diamond Crystal kosher is nearer 9 g, which is fine. Weigh your own salt once instead of trusting the spoon.

Does salt make pasta water boil faster or slower?

Neither in any way you can notice. Ten grams of salt in a litre of water shifts the boiling point by a fraction of a degree, which is far less than the difference between a lid on and a lid off. Add it early or add it at the boil; the timing changes the flavour not at all.

Should I add salt before or after the water boils?

Either works, and the pasta cannot tell. Adding it once the water boils is the habit most chefs quoted by Appetito follow, mainly so you can taste the water after a stir and before the pasta goes in. Adding it cold just means it dissolves while you wait.

How much salt for 500 g of pasta in a 5 litre pot?

About 50 g of salt, which is 10 g per litre. With fine table salt that is roughly 3 1/2 tablespoons; with Morton kosher, about 4 1/4; with Diamond Crystal kosher, closer to 6 to 7 tablespoons. Use the pot size, not the pasta weight, to set the salt.

Do I still salt the water if I use the pasta water in the sauce?

Yes, but hold to 10 g per litre and use the reserved water with a lighter hand. A 1% brine reduced into a sauce with pecorino can tip it over. Ladle in 1/4 cup (60 ml) at a time and taste between additions rather than pouring in a full cup at once.

Is sea salt better than table salt for pasta water?

No difference once it is dissolved in 4 litres of water. Sea salt, kosher and table salt are all sodium chloride; the crystal shape only matters in the spoon, not in the pot. Morton's chart puts its coarse sea salt at 1:1 with table salt by volume, so use whichever is cheapest and weigh it.

Can I use iodised salt in pasta water?

Yes. At 10 g per litre the iodine is far too dilute to taste, and most of the water goes down the drain anyway. Use iodised salt if it is what you have. Reserve the flaky finishing salt for the plate, where its crunch is actually noticeable.

Why does my pasta taste salty even with the right amount?

The sauce is usually the culprit. Pecorino Romano, anchovies, capers and pancetta each carry heavy sodium, and a 1% pasta water on top of them adds up. Drop the water to 7 g per litre for those dishes, and taste the sauce before adding any reserved pasta water.

How much salt does the pasta actually absorb from the water?

A real share. The PMC study on pasta cooked in salted water measured sodium at nearly 5 times the level of pasta cooked unsalted when it was not rinsed. Rinsing knocks that down but strips the starch you want for the sauce, so the practical control is the amount of salt in the pot.

How long does salt keep in an open ceramic jar by the stove?

Indefinitely as a food, since salt does not spoil, but it will clump if the bamboo lid is left off in steam. Keep the lid seated between pots, keep the 300 ml jar a step back from the burner, and dry the spoon before it goes back in. A jar of fine salt lasts about thirty pots at 10 g each.

How much salt for 2 litres of pasta water?

About 20 g, which is 10 g per litre. With fine table salt that is roughly 4 1/2 teaspoons; with Morton kosher about 5 1/2; with Diamond Crystal kosher close to 3 tablespoons. Two litres covers 1 to 2 servings, around 100 to 200 g of dried pasta.

How much salt for 4 quarts of water for pasta?

About 38 to 40 g, since 4 US quarts is 3.8 litres and the target is 10 g per litre. That is around 3 tablespoons of fine salt, 3 3/4 tablespoons of Morton kosher, or roughly 6 tablespoons of Diamond Crystal, which is why kosher-salt recipes look so heavy on the spoon.

What percentage of salt should pasta water be?

One percent by weight, with 0.7 to 1.2% as the working range. That is 10 g in 1,000 g of water. Seawater is 3.5%, so a literal reading of the old advice overshoots by a factor of three and a half. Taste a sip after stirring: seasoned like broth is right, sharp like brine is too far.

How much salt per pound of pasta?

Set it by the water, not the pasta. One pound (454 g) of dried pasta cooks well in 3 to 4 litres of water, which needs 30 to 40 g of salt at 10 g per litre. A pound in an oversized 6-litre stockpot still gets 60 g because the concentration is what the pasta tastes.

Can I use less water and less salt to cook pasta?

Yes, and it saves both. A 2-litre pot for 1 lb (454 g) of pasta needs only 20 g of salt, and the water turns starchier, which helps the sauce cling. Stir for the first 2 minutes so the pasta does not weld together, and keep it at a rolling boil.

Does a rounded scoop of salt weigh the same as a level one?

No, a rounded scoop can hold 30 to 50% more than a level one of the same spoon. Weigh 10 g once, look at whether it sits level or heaped in your scoop, and repeat that shape every time. A 3.2 in (8.2 cm) ceramic spoon works because the same spoon lives with the same salt.

Is a pinch of salt enough for pasta water?

No. A three-finger pinch is roughly 0.3 to 0.5 g, so a 4-litre pot at 10 g per litre would need about a hundred of them. Pinches season a finished sauce or a plate; the pot needs a scoop or a weighed 40 g.

How do I fix pasta water that is already too salty?

Pour out a third of the water and top up with fresh from the kettle before the pasta goes in. Cutting 4 litres at 3% brine to about 2 litres and refilling to 4 brings it near 1.5%; do it twice to reach 1%. Once the pasta is cooking, a rinse under the tap is the only fix and it strips the starch.

How do I fix pasta that came out bland?

Toss it in the pan with the sauce plus 1/4 cup (60 ml) of the salted cooking water for 60 seconds over medium heat. The starch and salt in that water season it from outside. Next pot, raise the salt from wherever you were to 10 g per litre and taste the water before adding the pasta.

Should I salt the water for gluten-free pasta?

Yes, at the same 10 g per litre. Rice and corn pastas cook in 6 to 10 minutes and take up salt like wheat pasta does. Stir them more in the first minute because they stick harder, and hold back 1/2 cup (120 ml) of the water since gluten-free pasta releases less starch.

Do I need to salt the water for fresh pasta differently?

Keep it at the full 10 to 12 g per litre and do not go lower. Fresh egg pasta is done in 2 to 4 minutes, so it has a fraction of the contact time of dried pasta that boils for 9 to 12. The chefs quoted by Appetito make the same point: less time in the water means it needs more salt in it.

Does salting the water matter for soup pasta like orzo or ditalini?

Less than usual, because the pasta cooks in the soup and the soup carries its own seasoning. If you boil it separately first, salt at 7 g per litre, then finish the soup by tasting. If it cooks in the broth, season the broth to taste after the pasta is tender, not before.

Should pasta salad water be salted more?

Salt it at the normal 10 g per litre and lean on the dressing. Cold food reads less seasoned than hot, and rinsed pasta salad loses surface salt anyway. Rinse for 30 seconds under cold water only to stop the cooking, then dress within 10 minutes while the pasta still absorbs.

How much salt goes in the water for ravioli or tortellini?

About 8 g per litre, a touch under the usual 10, because the filling is already seasoned and the pasta cooks in 3 to 5 minutes. Keep the water at a gentle boil rather than a rolling one so the seals hold, and lift the parcels out with a spider instead of tipping them into a colander.

Should I salt the water when cooking pasta for a baked dish?

Yes, at 7 g per litre. Baked ziti or lasagne concentrates as it bakes for 30 to 45 minutes at 375°F (190°C), the cheese carries plenty of sodium, and the pasta keeps absorbing sauce in the oven. Undercook the pasta by 2 minutes as well.

Does the type of pot change how much salt I need?

No, only the volume of water does. A wide 4-litre pan and a tall 4-litre pot both take 40 g. The wide one boils sooner and evaporates faster, so if a rolling boil runs 15 minutes with the lid off you lose enough water to nudge the concentration up slightly.

Does the water evaporating make pasta water saltier?

A little. A hard boil with the lid off can drive off 200 to 300 ml from a 4-litre pot in 12 minutes, which lifts 1% brine to about 1.07%, not enough to taste. If you keep the pot going for a second batch, top it up with fresh water rather than adding more salt.

Can I reuse pasta water for a second batch of pasta?

Yes, for one more batch within the hour. Top it back up to the original level with fresh water and do not add salt; the 10 g per litre is still there. The second batch will be starchier and a shade cloudier. Throw it out after that, or once it has cooled below 140°F (60°C) for more than 2 hours.

How long can reserved pasta water sit before I use it?

Use it within 2 hours at room temperature, or refrigerate it and use within 2 days. A 1% brine is not preserved food; it is starchy water. Reheat it to a simmer before adding it to a sauce so it does not cool the pan. Freezing it in 1/2 cup (120 ml) portions works for a month.

Should I add oil to salted pasta water?

No. A tablespoon of oil floats on 4 litres of water and does nothing to stop sticking; stirring in the first 2 minutes does. The oil then coats the drained pasta and the sauce slides off. Save the oil for the pan and spend the money on 40 g of salt instead.

Why does my pasta water foam over when I add salt?

You added the salt to water already at a rolling boil. Salt crystals give the superheated water thousands of nucleation points and it erupts for a few seconds. Add the 40 g with the pot at a simmer, or pull it off the heat for 10 seconds first and stir it in.

Does salt damage a stainless steel pot if I add it to cold water?

It can pit the base over time. Undissolved salt sitting on cold stainless steel is a known cause of small pits, so either add the salt to boiling water where it dissolves in seconds, or stir cold water until no crystals remain on the bottom. A pitted pot still works but is harder to clean.

Can I salt pasta water with soy sauce or stock instead?

You can, but weigh the sodium. A tablespoon of soy sauce carries around 900 to 1,000 mg of sodium, about 2.5 g of salt, so 4 litres would need 16 tablespoons to match 40 g of salt and would colour the pasta. Use stock for soup pasta and plain salt for everything else.

Does kosher salt taste different from table salt in pasta water?

Not once it dissolves. Dissolved sodium chloride is the same from any box; the difference is only crystal size, which affects how much fits in a spoon. Morton's chart has table salt and its coarse sea salt at 1:1 by volume and its kosher at 1 1/4 teaspoons per teaspoon of table salt.

Can I use flaky finishing salt to salt the pot?

You can, but it is wasteful and the spoon lies. Flake salt is so airy that a tablespoon may weigh 6 to 8 g against 17 g for table salt, and a 500 g box of it costs several times what fine salt does. Use cheap fine or coarse salt at 10 g per litre in the pot and keep the flakes for the plate.

Does adding salt make pasta water boil at a higher temperature?

Barely. Ten grams of salt in a litre of water raises the boiling point by well under 1°F, less than the difference a lid makes. The idea that salted water cooks pasta hotter is a myth; the salt is there to season the pasta, not to change the physics.

How much sodium does salted pasta actually add to a meal?

Enough to matter on a restricted diet. The PMC study found pasta cooked in salted water and not rinsed carried nearly 5 times the sodium of pasta cooked unsalted. Against a 2,300 mg daily value, a 100 g serving of salted pasta can contribute several hundred milligrams.

Is it safe to cook pasta in unsalted water?

Completely, and it is the lowest-sodium method. The PMC mineral study recommends unsalted water and no rinsing as the best treatment. The pasta will taste flat on its own, so season the sauce deliberately and finish with 1/4 teaspoon of salt in the pan if it needs it.

Should I rinse pasta to remove salt?

Only if sodium is the priority. Rinsing knocks the absorbed sodium down by roughly a third in the PMC data, but it also washes off the surface starch that binds sauce. For most cooks the better route is 7 g per litre in the pot and no rinse.

Can I put salt in a 300 ml ceramic jar next to the stove?

Yes, that is the job it is sold for. About 300 ml holds around 300 g of fine salt, which is thirty pots at 10 g each. Keep the bamboo lid seated between uses and stand the jar a step back from the burner so steam does not settle on the lid.

How do I keep salt from clumping in a jar by the stove?

Keep the lid on between pots and the jar out of the steam. Salt draws water from the air, and a lid that flips shut cuts the hours it sits open. If it does cake, break it with the spoon; caked salt is still salt. A few grains of uncooked rice in the bottom absorb stray moisture.

How often should I wash a salt jar?

Every 4 to 6 weeks, or whenever the salt looks grey or damp. Empty it, hand wash the ceramic body and spoon in warm soapy water, rinse, and dry fully before refilling; a damp jar cakes the next fill. Wipe the bamboo lid with a damp cloth and let it air dry rather than soaking it.

Can a bamboo-lidded salt jar go in the dishwasher?

No. The product page is explicit that the ceramic body and spoon are hand wash only, and the bamboo lid and tray should be wiped dry rather than soaked. A 30-minute dishwasher cycle at 140°F (60°C) will swell and split bamboo. Wash all pieces by hand and dry them before refilling.

Should the salt jar sit right next to the burner?

No, a step back. Steam from a 4-litre pot condenses on anything within a foot of the rim, and the product page says to keep the bamboo lid away from steam and splashes. Put the jar 12 to 18 in (30 to 45 cm) from the cooktop, still within arm's reach of the pot.

How big is the ceramic spoon that comes with the jar?

About 3.2 in (8.2 cm) long, which is a small scoop rather than a tablespoon. Weigh 10 g of your salt into it once to see whether that reads as level or rounded, and use that shape from then on. One spoon ships with each jar in the 1, 2 and 3 jar sets.

What is the jar made of?

A speckled ceramic body with a bamboo flip lid, and the 2 and 3 jar sets add a bamboo tray. Each jar measures about 4.1 in (10.5 cm) wide by 3.6 in (9.2 cm) high and holds about 300 ml. The spoon is a small matching utensil for dry seasoning.

Can I keep sugar and salt in matching jars without mixing them up?

Yes, if you fix a position and never swap it. The 2 jar set was described on the product page as salt and sugar, and the usual rule is salt nearest the stove, sugar nearest the coffee. A 10 g scoop of sugar in a 4-litre pot will not ruin dinner, but it will not season it either.

Is 300 ml of salt enough for a week of cooking?

Comfortably. At 10 g per litre, a 4-litre pot uses 40 g, so 300 g of fine salt covers seven or eight pots plus pinches for sauces and salads. Most households refill a jar that size every 3 to 6 weeks. Coarse salt packs looser, so the same jar holds a bit less by weight.

Can I use the salt jar for pepper flakes or other seasonings?

Yes. The listing names salt, sugar and dry seasoning, with pepper flakes near a prep board as one suggested use. Keep it to dry ingredients; ground spices with oil in them, like paprika, cake faster in an open jar than salt does, so refill those in smaller amounts.

What does 'salt the water like the sea' actually mean in grams?

Taken literally, 35 g per litre, since average seawater is 3.5% salt. Taken as most Italian cooks intend it, about 10 g per litre, a third of that. The phrase is a warning against timid salting, not a measurement, so use the 10 g figure and taste.

How do I convert grams of salt to teaspoons for kosher salt?

For Morton kosher, take the table-salt figure and add a quarter; for Diamond Crystal, roughly double it. Ten grams is about 2 1/4 teaspoons of table salt, near 2 3/4 teaspoons of Morton kosher, and around 4 to 4 1/2 teaspoons of Diamond Crystal. A scale removes the guessing.

Why do recipes disagree so much about salt in pasta water?

Because most are written in spoons of an unnamed salt. A tablespoon of table salt is about 17 g while a tablespoon of Diamond Crystal is about 9 g, so two recipes saying '1 tablespoon per litre' differ by nearly double. Recipes written in grams, 8 to 12 per litre, mostly agree.

Does salt in the water make pasta tougher or softer?

No noticeable change at 10 g per litre. Pasta cooked in 1% brine and in plain water reach al dente within the same 9 to 12 minute window. The old idea that salt toughens the surface comes from bread doughs and cured meats, not from a pot of boiling water.

Can I salt pasta after cooking instead of the water?

You can, but it seasons only the surface. Salt sprinkled on drained pasta sits on the outside while the inside stays bland, and it needs to be added while the pasta is hot and wet to stick. Pot salt at 10 g per litre seasons all the way through; pan salt fixes an underseasoned batch.

What if I only have a measuring cup and no spoon or scale?

Use the 1/4 cup mark for fine salt. A level 1/4 cup of table salt is roughly 70 g, so fill it a little over halfway for a 4-litre pot at 40 g. Coarse kosher runs lighter, so use the full 1/4 cup for Morton and a heaped one for Diamond Crystal, then taste the water.

Should I taste pasta water with a spoon or my finger?

A spoon, and one that goes in the sink afterwards. Dip a clean spoon, let the water cool 10 seconds, and sip. It should taste clearly salted, like a good broth. A finger into 212°F (100°C) water is a burn, and dipping the salt scoop into boiling water carries moisture back to the jar.

Does a huge stockpot need the same concentration as a small pan?

About 80 g, which is 10 g per litre. That is roughly 1/3 cup of fine salt, 6 1/2 tablespoons of Morton kosher, or close to 3/4 cup of Diamond Crystal. Big pots feel like they need less per litre; they do not, because the pasta tastes the concentration, not the total.

Can I cook pasta in seawater on holiday?

Not as it comes. Real seawater is 35 g per litre, triple the target, and it carries whatever is in that bay. Dilute one part seawater with two parts fresh water to land near 1.2%, and only from clean open water. Boiling for a few minutes kills bacteria but removes nothing chemical.

Does hard tap water change how salty pasta water tastes?

Not perceptibly. Hard water carries a few hundred milligrams of calcium and magnesium per litre, mostly as bicarbonate and sulfate, against 10,000 mg of added salt. It can leave a white crust on the pot rim and make the water taste flatter, but the 10 g per litre figure does not change.

What is the fastest way to salt a pot every night without measuring?

Calibrate one scoop, then count. Weigh 10 g of your everyday salt into the spoon that lives in the jar, note the fill, and from then on use one scoop per litre. A 4-litre pot is four scoops; total time about 5 seconds and no scale, no spoons and no arguing with the recipe.