1 teaspoon of soy sauce weighs 5.31 g. A teaspoon is one forty-eighth of a cup, and a cup of soy sauce is 255 g poured, so the maths is 255 ÷ 48 = 5.31 g. The same cup divided by 16 gives the tablespoon weight of 15.9 g, and there are 3 teaspoons in every tablespoon. If you cook from recipes written in cups and spoons, this page is the bridge between the two, and the worked examples show the conversion inside real dishes rather than in isolation.
Soy sauce by the teaspoon is the measure for seasoning: a spoonful in a stir-fry, a spoonful in a marinade, or a spoonful in a dipping sauce where the salt has to be exactly right. A teaspoon holds 5.31 g, and a cup is 255 g — soy sauce is a thin liquid, heavier than water per spoon because the dissolved salt and sugars add mass. The spoon table is the fastest way to keep a stir-fry in balance, because soy sauce is salt as well as flavour, and an extra teaspoon can make the whole dish too salty to eat.
All figures on this page are approximate, and they come from USDA, measured poured. When a recipe has to work the first time, verify with a kitchen scale.
Conversion table
One teaspoon is one forty-eighth of a cup, so every figure in this table is the cup weight divided by 48, rounded to two decimal places. All figures are approximate; verify with a kitchen scale when it matters.
| Teaspoons | Grams (approx.) |
|---|---|
| 1 tsp | 5.31 g |
| 2 tsp | 10.62 g |
| 3 tsp | 15.94 g |
| 4 tsp | 21.25 g |
| 5 tsp | 26.56 g |
| 6 tsp | 31.88 g |
| 7 tsp | 37.19 g |
| 8 tsp | 42.50 g |
| 9 tsp | 47.81 g |
| 10 tsp | 53.12 g |
| 11 tsp | 58.44 g |
| 12 tsp | 63.75 g |
The tablespoon figures are included too, because most recipes switch between teaspoons and tablespoons, and 3 teaspoons make 1 tablespoon.
| Tablespoons | Grams (approx.) |
|---|---|
| 1 tbsp | 15.9 g |
| 2 tbsp | 31.9 g |
| 3 tbsp | 47.8 g |
| 4 tbsp | 63.8 g |
| 5 tbsp | 79.7 g |
| 6 tbsp | 95.6 g |
| 7 tbsp | 111.6 g |
| 8 tbsp | 127.5 g |
| 9 tbsp | 143.4 g |
| 10 tbsp | 159.4 g |
| 11 tbsp | 175.3 g |
| 12 tbsp | 191.2 g |
| 13 tbsp | 207.2 g |
| 14 tbsp | 223.1 g |
| 15 tbsp | 239.1 g |
| 16 tbsp | 255.0 g |
One tablespoon is one sixteenth of a cup, so every tablespoon figure is the cup weight divided by 16, rounded to one decimal place.
Cups to grams for reference
When a recipe jumps from spoons to cups, use this table instead of counting out 16 tablespoons. Every figure is the cup weight multiplied by the fraction, rounded to one decimal place, and all figures are approximate.
| Cups | Grams (approx.) |
|---|---|
| 1/4 cup | 63.8 g |
| 1/3 cup | 85.0 g |
| 1/2 cup | 127.5 g |
| 2/3 cup | 170.0 g |
| 3/4 cup | 191.2 g |
| 1 cup | 255.0 g |
One cup of soy sauce weighs 255 g, so a quarter cup is 63.8 g and half a cup is 127.5 g. Those two figures cover most everyday scaling, and the full table above covers the rest.
How the measurement works
The figure on this page comes from USDA, measured poured. Salty, umami-rich fermented soybean sauce. Stir-fries, marinades, dressings and dipping.
All results on this page are approximate. Ingredient weights vary with brand, humidity, temperature and how firmly you pack the spoon, so when a recipe has to work the first time, weigh the ingredient on a kitchen scale and use the numbers here as a guide. The method matters more than the number itself, because the same spoon of soy sauce measured two different ways can give two different weights, and the USDA value assumes the poured method every time.
Worked examples
A stir-fry for one
A stir-fry for one takes 3 teaspoons (15.94 g) of soy sauce tossed in at the very end, and the spoon measure keeps the dish seasoned instead of salty. Add it last, after the heat is off, or the soy sauce reduces and the salt concentrates — a stir-fry seasoned early always tastes saltier than one seasoned late.
A marinade for a single chicken breast
A marinade for one chicken breast takes 4 teaspoons (21.25 g) of soy sauce mixed with a little oil, garlic and ginger, and the spoon measure keeps the marinade from over-salting the meat. Marinate for thirty minutes, not overnight — soy sauce is salty enough to cure the outside of the meat if it sits too long.
A dipping sauce for dumplings
A dipping sauce for two takes 5 teaspoons (26.56 g) of soy sauce mixed with rice vinegar and a drop of sesame oil, and the spoon measure keeps the sauce balanced — too much soy sauce and the vinegar disappears, too little and the sauce is just sharp vinegar. Taste it before you serve it, because soy sauce brands vary in saltiness.
Practical guidance
Pour soy sauce into the spoon rather than scooping it — it is a thin liquid, and a spoonful poured level is far more accurate than a spoonful dipped from a bowl. Do not fill the spoon to the brim: a level teaspoon is the measure, and a brimming spoon holds a gram or two more, which is enough to over-salt a small dish. Light and dark soy sauce weigh the same per teaspoon, so the figures hold for both — but dark soy sauce is thicker, sweeter and less salty, so do not swap them without adjusting the seasoning.
Soy sauce is mostly salt water, which is why it keeps so well: an opened bottle lasts for months in a cool cupboard, and refrigerating it after opening keeps the flavour fresher for longer. The salt is also why it over-seasons so easily — when a recipe calls for both soy sauce and salt, reduce the salt first and taste before adding more.
Scaling with spoons is easy once you know the weight of one spoon. To measure 100 g of soy sauce, count out about 18.8 teaspoons, and for 50 g, about 9.4 teaspoons. Halving a recipe that calls for 4 teaspoons means using 2 teaspoons, or 10.62 g, and doubling it means 8 teaspoons, or 42.50 g. The key is to scale every ingredient by the same factor, because changing one ingredient without changing the others throws the recipe out of balance. For large amounts, switch to a cup measure or a scale, since counting out teaspoons one by one is slow and error-prone, and a cup is faster and more accurate.
When should you weigh soy sauce instead of measuring it? Whenever the recipe has to work the first time, and whenever the amount is large. A kitchen scale costs less than a single failed bake, and it removes the biggest source of variation in home cooking, which is the way ingredients pack into a cup or a spoon. Put the bowl on the scale, press tare, and add the soy sauce until the display shows the number you need. There is nothing to wash afterwards except the bowl, and the result is the same every time. For small amounts, a level spoon is accurate enough, and for anything where precision matters, the scale is the tool to reach for.
Storage. Cool cupboard; refrigerate after opening for best flavour.
- Level every spoon with the back of a knife.
- Use spoons for small amounts, and a scale for large ones.
- Keep the same spoon for the whole recipe so errors stay consistent.
Frequently asked questions
How many grams is 1 teaspoon of soy sauce?
One level teaspoon of soy sauce weighs approximately 5.31 g. That figure comes from dividing the cup weight of 255 g by 48, and it assumes the ingredient is measured poured. All figures on this page are approximate, so verify with a kitchen scale when it matters.
How much salt is in a teaspoon of soy sauce?
A lot. Soy sauce is very salty for its volume — a single teaspoon carries a noticeable share of the salt in a whole dish. That is why a recipe that calls for both soy sauce and salt needs the salt reduced first, and why you should taste before adding more.
Do light and dark soy sauce weigh the same?
Yes, for practical purposes. Both weigh about 5.31 g per teaspoon. The difference is flavour and colour: light soy sauce is saltier and thinner, dark soy sauce is thicker, sweeter and less salty, and it is used more for colour than for seasoning.
Should I add soy sauce early or late in cooking?
Late. Soy sauce reduces as it cooks and the salt concentrates, so a stir-fry seasoned early always tastes saltier than one seasoned late. Add it in the last minute, toss it through, and taste before adding more.
How many teaspoons of soy sauce are in a tablespoon?
There are 3 teaspoons in 1 tablespoon, so 1 tablespoon of soy sauce weighs approximately 15.9 g, which is three times the teaspoon weight of 5.31 g. Use the tablespoon table on this page when a recipe switches between the two units.
How should I store soy sauce?
Cool cupboard; refrigerate after opening for best flavour. Keeping it stored properly also keeps its weight consistent, since an ingredient that has absorbed moisture or dried out will not weigh the same per spoon as a fresh one.