You can use table salt instead of sea salt at a ratio of 1:1 by weight. Salt swaps are not about the saltiness of the salt — all salt is sodium chloride — they are about the size and shape of the crystals, and that is where most people go wrong. Salts differ by crystal size, so swap by weight, not by volume — kosher salt is far lighter per cup than table salt. A teaspoon of fine table salt packs far more salt into the spoon than a teaspoon of big, hollow kosher flakes, so a cup-for-cup swap can easily double the salt or halve it. The ratio above is the sourced ratio for this pair, and the table below scales it to the amounts recipes actually call for.
This matters more than it sounds. Salt is the one ingredient in almost every recipe, and it is the one where a small measuring error is immediately obvious: too little and the dish tastes flat, too much and it is inedible. That is why this guide spends time on weighing. A kitchen scale removes the whole problem — the same weight of any salt is the same amount of salt, whatever the crystal size. If you cook with more than one kind of salt, a scale is the single best purchase you can make, and it costs less than a bag of good flaky salt.
The ratio, in a table
| Sea salt called for | Table salt (by weight) |
|---|---|
| 1/2 tsp | the same weight as 1/2 tsp sea salt |
| 1 tsp | the same weight as 1 tsp sea salt |
| 1 tbsp | the same weight as 1 tbsp sea salt |
| 1/4 cup | the same weight as 1/4 cup sea salt |
By volume, fine sea salt and table salt are close enough to swap 1:1 in most cooking, but flakes are much lighter per spoonful — weigh flaky salt, or it will under-salt the dish. The numbers in the table are the ratio 1:1 by weight scaled up and down. All amounts in this guide are approximate, and the ratio comes from CookScale's substitution data rather than from a single brand's packaging. If the recipe matters — a cake for a celebration, a batch you are selling, or anything where a small error shows — weigh the ingredients on a kitchen scale and taste as you go. If you are in doubt, undershoot: add two-thirds of the salt, taste, and add the rest. You can always add more salt at the end of cooking, but you cannot take it out, and an over-salted pot is a much bigger problem than an under-salted one.
Worked examples
Example 1: A bread dough written for sea salt
A bread recipe calls for 2 teaspoons of fine sea salt. Use the same weight of table salt instead, and the loaf will rise and taste exactly the same. Dissolve the table salt in the water before you add the flour, so it distributes evenly through the dough. Bread is the recipe where the salt measure matters most, because salt controls the yeast, and a weight-for-weight swap keeps the yeast on exactly the same schedule.
Example 2: A tomato sauce that calls for sea salt
A tomato sauce recipe calls for 1 teaspoon of fine sea salt. Use the same weight of table salt instead — a teaspoon by volume is close enough for fine sea salt — and the sauce will taste identical. Add it in stages and taste before serving, because the sauce concentrates as it cooks and the salt tastes stronger by the end. There is no texture difference at all, because both salts dissolve completely in a sauce.
Example 3: A batch of shortbread
A shortbread recipe calls for 1/2 teaspoon of fine sea salt. Use the same weight of table salt instead, and the shortbread will be seasoned the same. Table salt is the better choice here anyway, because its fine crystals dissolve evenly in the butter and sugar, while a coarse sea salt can leave crunchy pockets in a delicate biscuit. Cream the butter and sugar well, and the salt will disappear into the dough completely.
What changes in the result
The flavour change is none: fine sea salt and table salt are both sodium chloride, and once dissolved they taste identical. The practical differences are small but real. Table salt is iodised, which is a public-health addition with no effect on flavour in normal cooking; sea salt is not. Table salt has anti-caking agents that keep it flowing in damp weather; sea salt can clump. Table salt dissolves slightly faster, because its crystals are finer and more uniform. None of this changes the finished dish — it changes how you store the salt and how you measure it. The warning is about flakes: flaky sea salt is far lighter per spoonful, so a volume swap with flakes will under-salt the dish, and flakes should be weighed, not spooned.
Texture changes too, in ways that have nothing to do with saltiness. Fine salt dissolves quickly and disappears into a sauce or a dough; coarse flakes dissolve slowly and can leave crunchy pockets if they are added late. Flaky salt sprinkled on top of a finished dish stays crunchy and gives little bursts of salt — that is its whole appeal. Kosher salt is the cook's favourite for seasoning by hand because the big crystals are easy to pinch and scatter evenly, and you can see where it has landed. None of this changes the flavour of the salt itself, but it changes how the dish eats, and that is what the cook is really choosing.
When not to substitute
Do not swap salts cup-for-cup; Diamond Crystal kosher salt is about half the weight of table salt per cup. Do not use flaky sea salt in a volume swap with table salt — flakes are much lighter per spoonful, and you will under-salt the dish by roughly half. Use fine sea salt for this swap, and weigh it if the salt is coarse. And do not use table salt as a finishing salt: it has no crunch, and a finishing salt needs crunch.
There are also jobs where one salt is simply the wrong tool. Do not use a coarse salt in a recipe where it has to dissolve quickly and completely — a smooth sauce, a meringue, a brine that needs to be exact — unless you give it time and stirring. Do not use a flavoured salt, like the celery salt in this guide's family, where the extra flavour would clash: it is a seasoning in its own right, not a neutral stand-in. And do not use an expensive finishing salt inside a dough or a stew, where its crunch and its delicate flavour disappear entirely. Save the good salt for the top of the dish, where you can taste it.
Practical guidance
Keep one salt as your everyday cooking salt and learn its measure by feel — most cooks use kosher salt for that, because it is easy to pinch and forgiving to scatter. Keep a small dish of flaky salt by the stove for finishing, and keep table salt for baking, where its fine crystals dissolve evenly and its exact measure matters. Label your containers, because kosher salt and table salt look similar in a jar and they are not interchangeable by the spoonful. When a recipe just says 'salt' with no kind given, it usually means table salt in older books and kosher salt in newer ones — if the result tastes under-salted, the recipe probably meant the finer salt, and if it tastes over-salted, it probably meant the coarser one. Taste as you cook, salt in stages rather than all at once, and remember that sauces and soups concentrate as they reduce, so the salt you add at the start tastes stronger by the end.
Table salt is the salt to keep in a shaker on the table, because it flows freely and pours evenly. Fine sea salt is the salt to keep in a jar by the stove for cooking. They are interchangeable by weight, so use whichever one you have — the dish will not know the difference. If your table salt has been in the cupboard for years, it is still fine: salt does not go off, it just clumps, and a few grains of dry rice in the shaker will keep it flowing.
Frequently asked questions
Does table salt taste different from sea salt?
Once dissolved, no. Both are sodium chloride, and the trace minerals in sea salt are present in amounts too small to taste in a finished dish. The difference people notice is texture — flakes stay crunchy on top of a dish, while fine salt disappears — and that is a difference of crystal size, not of flavour.
Is the iodine in table salt a problem?
No. The iodine in table salt is added to prevent iodine deficiency, and it has no effect on flavour in normal cooking. Some people say they can taste it in very delicate dishes, but in a soup, a stew or a dough it is undetectable. If you switch entirely to sea salt, your iodine will need to come from elsewhere in your diet, such as dairy, eggs or seafood.
Can I just swap salts 1:1 by volume?
Only if the two salts have similar crystal sizes. Fine sea salt and table salt are close enough for most cooking, and the ratio for this pair is 1:1 by weight. But kosher salt and flaky salt are much lighter per spoonful, so a 1:1 volume swap under-salts the dish — sometimes by half. The safe rule is to swap by weight: the same weight of any salt is the same amount of salt, whatever it looks like.
Why do recipes specify a brand of kosher salt?
Because the two big brands are different densities. Diamond Crystal kosher salt is light and hollow, Morton is denser and heavier, so a teaspoon of one is not a teaspoon of the other. A recipe written for Diamond Crystal needs about one and a half teaspoons per teaspoon of table salt, while Morton needs about one and a quarter. If a recipe does not say which brand, Diamond Crystal is the usual assumption in American recipes.
Does the kind of salt change the flavour?
Barely, once it is dissolved. All salt is sodium chloride, and dissolved in a soup or a dough the differences are tiny. What changes is texture — flakes stay crunchy on top of a dish — and the trace minerals in some sea salts, which can add a very faint bitterness or sweetness that most people cannot detect in a finished dish. Choose salt for its crystal size and how you use it, not for a flavour difference you probably cannot taste.