1 Cup Soy Sauce in Grams

1 cup of soy sauce weighs 255 g (poured, USDA). Salty, umami-rich fermented soybean sauce. All the figures on this page are approximate conversions based on the USDA value, so when a recipe really matters, verify with a kitchen scale.

Why weighing soy sauce beats measuring it in cups

Soy sauce weighs 255 g per cup, heavier than water, because it is a salty liquid with dissolved solids from fermented soybeans and wheat. The weight is measured poured, not spooned and levelled, because soy sauce is a liquid and the cup is filled by pouring to the line. That distinction matters: a liquid measured in a dry cup is less accurate than a liquid measured in a jug, because the dry cup has no pouring spout and no clear line, so use a liquid measuring jug for soy sauce, or weigh it on a scale, which is the most reliable method of all.

Salt is the reason the weight matters for soy sauce. A cup of soy sauce contains a large amount of salt, and a small error in the amount is a large error in the seasoning of the dish. A stir-fry made with a cup of soy sauce instead of half a cup will be inedibly salty, and the salt cannot be removed once it is in. Light and dark soy sauce also differ: dark soy sauce is thicker, darker and slightly heavier per cup, and it is used for colour as well as flavour, while light soy sauce is thinner and saltier. The 255 g figure from the USDA is medium confidence and applies to the regular soy sauce most people buy.

Soy Sauce cups to grams conversion table

Cups Grams Tablespoons
1/4 cup 63.8 g 4
1/3 cup 85 g 5.3
1/2 cup 127.5 g 8
2/3 cup 170 g 10.7
3/4 cup 191.2 g 12
1 cup 255 g 16
1 1/2 cups 382.5 g 24
2 cups 510 g 32
3 cups 765 g 48
4 cups 1020 g 64

One tablespoon of soy sauce weighs about 15.9 g, since a cup is 16 tablespoons. That is useful when a recipe calls for a spoonful or two rather than a whole cup, though for small amounts a scale that reads to the gram is far more reliable than a spoon, because a heaped tablespoon can weigh half as much again as a level one.

Worked examples

Stir-fry sauce for four

A stir-fry sauce for four people uses about 1/4 cup of soy sauce, which is 64 g, mixed with oyster sauce, sesame oil, garlic and a little sugar. Weigh 64 g rather than pouring from the bottle, because soy sauce is easy to over-pour and a small error makes the dish very salty. Add the sauce at the end of cooking so it coats the ingredients without reducing and becoming saltier.

Soy and honey marinade for chicken

A marinade for four chicken breasts uses about 1/3 cup of soy sauce, which is 85 g, mixed with honey, garlic, ginger and oil. Weigh 85 g and mix the marinade well, then marinate the chicken for at least 30 minutes. The soy sauce seasons the meat and helps it brown, but too much will make it salty, so the weight needs to be right.

Dipping sauce for dumplings, serves six

A dipping sauce for six people uses about 1/2 cup of soy sauce, which is 128 g, mixed with rice vinegar, chilli oil and spring onions. Weigh 128 g so the sauce is balanced: the soy sauce is the salty base, and the vinegar and chilli cut through it. Serve the sauce in small bowls so each person can dip as they like.

How the weight was measured

Spooned and levelled means spooning the ingredient into the measuring cup until it is heaped, then sweeping a straight knife across the top to level it off. Never scoop the cup through the bag or jar, and never tap the cup down, because both pack the ingredient and add weight. The difference between a spooned cup and a scooped cup can be 15 to 25 percent, which is enough to change a bake from tender to tough, so the method matters as much as the number.

The source for the figure on this page is USDA, and the confidence in the value is medium. USDA publishes a standard ingredient weight chart that recipe developers use as a reference, and this page follows that chart rather than any single cookbook. Where the chart gives a range or a note, we say so plainly instead of hiding the uncertainty. All the figures here are approximate conversions: natural ingredients vary by brand, variety, moisture and how finely they are chopped or ground, so when a recipe really matters, verify the weight with a kitchen scale.

Practical guidance

Store soy sauce in a cool cupboard, and refrigerate it after opening for best flavour, because it oxidises and loses its brightness over time. Use a liquid measuring jug for soy sauce, or weigh it on a scale, because a dry cup is the wrong tool for a liquid. Taste the dish before adding more soy sauce, because the salt builds up and cannot be removed. Check whether your soy sauce is light or dark: dark soy sauce is thicker and used for colour, light soy sauce is thinner and saltier, and the two are not interchangeable. If you do not have a scale, pour the soy sauce into a jug to the line and remember that the 255 g figure is approximate and medium confidence.

Common mistakes with condiments and sauces

The most common mistake is measuring thick sauces by the cup as if they poured like water. Tomato paste, mayonnaise and jam cling to the cup, trap air, and leave a film behind, so the amount that reaches the pan is less than the amount measured. A scale removes the problem entirely: weigh the jar before and after, or spoon the sauce onto the scale. The second mistake is eyeballing a tablespoon of paste or jam from the jar and calling it a cup's worth of accuracy; small errors in concentrated ingredients are large errors in flavour. The third is storing opened sauces at room temperature for weeks: most need the fridge once opened, and a sauce that has turned will spoil a whole dish. Finally, do not swap one sauce for another by volume alone: a cup of tomato paste and a cup of tomato sauce differ in concentration, salt and water, so the swap changes the recipe, not just the weight.

Frequently asked questions

How many grams is 1 cup of soy sauce?

1 cup of soy sauce weighs 255 g when poured, according to the USDA. The figure is medium confidence and approximate, because brands vary, so verify with a kitchen scale when it matters.

Is soy sauce heavier than water?

Yes. A cup of water weighs 237 g and a cup of soy sauce weighs 255 g, because soy sauce contains dissolved solids from fermented soybeans and wheat. The difference is small but real, so do not assume a cup of soy sauce weighs the same as a cup of water.

How many grams is a tablespoon of soy sauce?

One tablespoon of soy sauce weighs about 16 g, since a cup is 16 tablespoons and 255 g divided by 16 is about 15.9 g. A tablespoon is a more useful measure for soy sauce than a cup, because most recipes use small amounts.

What is the difference between light and dark soy sauce?

Light soy sauce is thinner, saltier and used for seasoning, while dark soy sauce is thicker, darker, slightly sweeter and used for colour. The two weigh slightly differently per cup and are not interchangeable without adjusting the recipe.

Can I use tamari instead of soy sauce?

Yes, tamari is a wheat-free soy sauce with a similar flavour, and the weight per cup is close. Use the same weight rather than the same volume, and taste the dish, because tamari is often slightly less salty than regular soy sauce.

Related conversions

If you need a different amount, the table above scales in both directions, and the converter tool will do the maths for any quantity. When a recipe really matters, weigh the ingredient on a kitchen scale rather than trusting the cup alone, because the figures on this page are approximate and natural ingredients vary by brand, variety and moisture.