Salt is the single most-used ingredient in cooking and one of the easiest to get wrong. A recipe calling for “1 tablespoon kosher salt” can produce a perfectly seasoned dish with one brand of kosher salt and an aggressively over-salted dish with another, because the two brands have flakes of meaningfully different density. The teaspoon measure is a volume, the salt is a solid, and the conversion from one to the other depends entirely on how the crystals pack together.
The good news is that the salt landscape is not as confusing as it looks once the underlying logic is clear. There are essentially three working categories (table salt, kosher salt, sea salt) plus a small group of finishing salts that exist for texture rather than flavor. Knowing which one suits which purpose and how to convert among them solves most kitchen salt problems.
Table salt
Table salt is finely ground sodium chloride, usually mined from underground deposits, with two common additives:
Iodine. Added since 1924 to address iodine deficiency. Most table salt sold in the US is iodized.
Anti-caking agents. Compounds like sodium aluminosilicate, calcium silicate, or magnesium carbonate that keep the salt flowing freely in humid kitchens. These are why table salt can be poured from a shaker without clumping.
The crystal shape is small and uniform. The density is high: about 6 grams per teaspoon. This high density is the reason table salt requires careful measuring; a teaspoon poured slightly heaped contains substantially more salt than a teaspoon leveled.
Table salt’s strengths:
- Cheap (around 50 cents per pound).
- Provides iodine for people who need it.
- Dissolves quickly and uniformly in liquids.
- Predictable density for baking.
Table salt’s weaknesses:
- The fine grain is hard to pinch and sprinkle evenly.
- Iodine and anti-caking agents can give a faint metallic or chemical taste in clean preparations.
- Easy to over-salt because of its density.
Best uses: baking (where precise weight matters), brines, and finishing dishes that require dissolved salt. Avoid for general cooking and seasoning.
Kosher salt
Kosher salt has larger, flake-shaped crystals than table salt. The name comes from its traditional use in koshering meat (drawing blood out of the muscle), and the larger flakes are better suited to that purpose. Modern kosher salt has no specific connection to kosher dietary law beyond the name.
Most kosher salt sold in the US has no additives. No iodine, no anti-caking agents, no preservatives. The result is a cleaner, less chemical taste compared to iodized table salt.
The two dominant brands in American kitchens are very different from each other:
Diamond Crystal Kosher Salt
Made by Cargill in Minnesota using a process called the Alberger method, which produces hollow, pyramid-shaped flakes. The flakes are large, light, and crush easily between fingers.
Density: about 2.8 grams per teaspoon. Dissolution rate: relatively fast because of the hollow structure. Crystal shape: irregular pyramids.
Diamond Crystal is the default kosher salt in most professional kitchens and is specified by Bon Appetit, NYT Cooking, Serious Eats, and most major recipe sites.
Morton Kosher Salt
Made by Morton Salt using a different production method that yields smaller, denser, more cubic flakes.
Density: about 4.8 grams per teaspoon. Dissolution rate: slower than Diamond Crystal because the crystals are more solid. Crystal shape: more uniform small cubes.
Morton kosher salt is also additive-free in most formulations (a few specific products contain anti-caking agents).
Why the difference matters
A teaspoon of Diamond Crystal weighs 2.8 grams. A teaspoon of Morton weighs 4.8 grams. That is a 71 percent difference in salt content from the same volume measurement. A recipe written for one brand that uses the other will be wrong by a wide margin.
Conversion rules:
- 1 teaspoon Diamond Crystal = about 1/2 teaspoon Morton kosher.
- 1 teaspoon Morton kosher = about 2 teaspoons Diamond Crystal.
- 1 teaspoon table salt = about 1 teaspoon Morton kosher = about 2 teaspoons Diamond Crystal.
When in doubt, check the recipe source. If the recipe was published after 2010 by a major American food site or cookbook, it almost certainly assumes Diamond Crystal unless otherwise stated. If the recipe is older or from a non-food-publication source, weigh out the salt by grams instead of measuring by volume.
Sea salt
Sea salt is produced by evaporating seawater, leaving sodium chloride and small amounts of other minerals. The exact mineral content depends on the source water and the production method, but typically 97 to 99 percent of the final product is sodium chloride.
Sea salts vary widely in crystal size, shape, and density:
Fine sea salt. Ground to a similar consistency to table salt. About 6 grams per teaspoon. Used like table salt.
Coarse sea salt. Larger crystals, often pressed flakes. About 3 to 5 grams per teaspoon depending on producer. Used like kosher salt.
Flaky sea salt. Light, pyramidal flakes designed for finishing. About 2 grams per teaspoon. Best examples: Maldon, Jacobsen, fleur de sel.
The mineral content differences between sea salt and table salt are small (most sea salts have less than 3 percent non-sodium-chloride minerals), so nutritional claims are largely marketing. The legitimate reasons to choose sea salt are flavor (some sea salts have a clean, briny note that iodized salt lacks), texture (the crystal shape and size), and absence of additives.
Finishing salts
A small group of premium salts is intended for finishing dishes at the table or just before serving, not for cooking.
Maldon Sea Salt
A British producer with distinctive flat pyramidal flakes. The flakes crunch under the teeth and dissolve slowly on the tongue, providing both salt flavor and textural contrast. Excellent on steak, roasted vegetables, chocolate, and tomato dishes.
Fleur de Sel
Hand-harvested salt scraped from the top of evaporation pans in coastal France (Guerande, Camargue). The flakes are smaller and more irregular than Maldon, with a slight pinkish or grayish tint from residual minerals. Expensive (around $30 per pound) and intended only for finishing.
Jacobsen Salt
An American producer (Oregon) making flake salt from Pacific seawater. Crystals are similar in shape to Maldon but slightly smaller. Sold in various smoked and flavored varieties.
Himalayan Pink Salt
Mined in Pakistan, mostly the Khewra mine. The pink color comes from trace iron oxide. Marketed heavily as a health food and a finishing salt, though its mineral content is no more useful nutritionally than any other salt. The flavor is essentially identical to regular sea salt. Best treated as a decorative finishing salt rather than a cooking salt.
Smoked Salts
Sea salt smoked over wood (most commonly applewood, alderwood, or oak). Produces a salt with a strong smoke flavor that adds complexity to grilled meats, deviled eggs, and barbecue rubs.
Finishing salts are used at the end of cooking, not during. A pinch of Maldon on a finished steak gives a crunch and a small salty pop that disappears entirely if the same Maldon is stirred into a sauce.
A practical kitchen setup
For most cooks, three salts cover almost every need:
-
Diamond Crystal kosher salt (large blue box, about $4) as the main cooking salt. Use for seasoning, brining, and general work.
-
Fine sea salt or table salt (any brand, about $1 to $4 per pound) for baking, where precise weight matters and the salt must dissolve uniformly.
-
A finishing salt (Maldon at about $8 for an 8.5-ounce box) for the final sprinkle on cooked food.
This three-salt setup costs under $15 and lasts most home cooks a year or more.
Converting between salts when needed
When a recipe specifies one salt and only another is available, the safest approach is to convert by weight rather than by volume:
| Salt | Grams per teaspoon |
|---|---|
| Table salt | 6.0 |
| Morton kosher | 4.8 |
| Fine sea salt | 5.5 to 6.0 |
| Diamond Crystal kosher | 2.8 |
| Maldon flake | 2.0 |
| Fleur de sel | 4.5 |
A digital kitchen scale is the only fully reliable way to convert. Weigh the called-for salt, then weigh out the same number of grams in whatever salt you have.
For everyday cooking where precision is less critical, start with less salt than the recipe specifies, taste, and adjust upward. This is the original purpose of kosher salt’s larger flakes: the cook can see what is being added, taste between additions, and avoid the over-salting that happens easily with fine table salt.
The single biggest improvement most home cooks can make is to commit to one salt for daily cooking, learn its weight per teaspoon, and stop thinking about it. Diamond Crystal is the path of least resistance for anyone working from contemporary American recipes. Morton is reasonable if it is what is already in the pantry, but recipes need to be adjusted accordingly.
Frequently asked questions
Is sea salt healthier than table salt?+
No, not in any nutritionally meaningful way. Sea salt and table salt are both about 97 to 99 percent sodium chloride. Sea salt retains trace amounts of other minerals (magnesium, calcium, potassium) from the source water, but the quantities are too small to affect daily mineral intake. The same sodium content per gram exists in both. The marketing of sea salt as a 'health food' is misleading. The legitimate reasons to choose sea salt are flavor, crystal texture, and absence of additives.
Why do recipes specify kosher salt instead of table salt?+
Three reasons. First, kosher salt's large flake shape gives the cook better control because pinches and sprinkles are visible against the food and easier to distribute evenly. Second, kosher salt dissolves slightly slower, which gives a small window to taste and adjust before over-salting. Third, kosher salt has no iodine or anti-caking agents, which can give a subtle metallic taste to clean dishes. Most professional kitchens use kosher salt by default for these reasons.
Can I substitute Diamond Crystal kosher salt for Morton kosher salt in a recipe?+
Not at one-to-one. Diamond Crystal flakes are larger and less dense, so a teaspoon weighs about 2.8 grams. Morton flakes are smaller and denser, so a teaspoon weighs about 4.8 grams. A recipe written for Diamond Crystal that uses Morton will end up almost twice as salty. The conversions: 1 teaspoon Diamond Crystal equals about 1/2 teaspoon Morton. Recipes from Bon Appetit, NYT Cooking, and most cookbook authors specify Diamond Crystal as the default.
When should I use a finishing salt like fleur de sel or Maldon?+
On finished dishes where the salt's texture and crunch is part of the experience. A pinch of Maldon on a steak just before serving gives a satisfying crunch and a small flavor pop. The same Maldon stirred into a soup is wasted because the flakes dissolve completely and lose what makes them special. Use finishing salts only at the table or in the final seconds before serving. Use kosher salt for actual cooking and seasoning.
Does iodized salt actually matter for health?+
Yes, modestly. Iodized salt was introduced in 1924 to address iodine deficiency in the US population, and the resulting drop in goiter rates was dramatic. Most Americans now get iodine from multiple sources (dairy, seafood, eggs, prenatal vitamins), so iodized salt is less critical than it was a century ago. For people on restricted diets, pregnant women, and people who eat little dairy or seafood, iodized table salt is a reasonable insurance source. For cooks who eat varied diets and prefer the cleaner taste of non-iodized salt, the absence of iodine is rarely a problem.
Priya Sharma
Priya Sharma writes for The Tested Hub.