Baking Soda — Grams & Cups Converter
A teaspoon of baking soda (also called bicarbonate of soda, bicarb) weighs about 4.79 g and a tablespoon about 14.4 g. A full US cup comes to 230 g, though almost no recipe calls for that much.
💡 Tip: Baking soda is about 4 times stronger than baking powder and needs an acidic ingredient in the recipe to activate and rise.
Spoon and cup measures for baking soda, in grams
| Amount | Grams |
|---|---|
| 1/4 tsp | 1.2 |
| 1/2 tsp | 2.4 |
| 1 tsp | 4.79 |
| 2 tsp | 9.58 |
| 1 tbsp | 14.4 |
| 2 tbsp | 28.8 |
| 1/4 cup | 57.5 |
| 1/3 cup | 76.7 |
| 1/2 cup | 115 |
| 1 cup | 230 |
Baking soda (bicarbonate of soda)
Baking soda is pure sodium bicarbonate and about 3 to 4 times stronger than baking powder, so recipes use very little — a teaspoon weighs about 4.8 g, and a typical amount is around ¼ teaspoon per cup of flour. It needs an acidic partner (buttermilk, yogurt, brown sugar, cocoa) to activate.
If your recipe uses the British name bicarbonate of soda, or just bicarb, it's exactly the same ingredient.
Grams of baking soda in teaspoons and tablespoons
| Grams | Amount | Ounces |
|---|---|---|
| 1 | 1/4 tsp | 0.04 |
| 2 | 3/8 tsp | 0.07 |
| 3 | 5/8 tsp | 0.11 |
| 5 | 1 tsp | 0.18 |
| 7 | 1 1/2 tsp | 0.25 |
| 10 | 2 1/8 tsp | 0.35 |
| 15 | 1 tbsp | 0.53 |
| 20 | 1 3/8 tbsp | 0.71 |
| 25 | 1 3/4 tbsp | 0.88 |
| 50 | 1/4 cup | 1.76 |
| 100 | 3/8 cup | 3.53 |
Where baking soda sits by weight
A cup of baking soda weighs 230 g, which puts it 8th by weight among the 9 spices & leaveners on this site. Its nearest neighbours are baking powder at 221 g and table salt at 273 g per cup.
Swapping these by the cupful is not like-for-like. A cup of table salt in place of baking soda puts roughly 43 g more in the bowl, so match the grams rather than the cups.
Questions people ask about baking soda
- How many grams is a tablespoon of baking soda?
- About 14.4 g per tablespoon — there are 16 tablespoons in a cup.
- How many grams is a teaspoon of baking soda?
- About 4.8 g per teaspoon.
- Is baking soda the same as bicarbonate of soda?
- Yes, identical — bicarbonate of soda (or bicarb) is the British name for baking soda.
- Can I substitute baking soda for baking powder?
- Only with adjustments; soda is far stronger and needs acid. Replace 1 teaspoon of baking powder with ¼ teaspoon baking soda plus ½ teaspoon cream of tartar.
- How much baking soda per cup of flour?
- About ¼ teaspoon per cup, paired with an acidic ingredient like buttermilk or yogurt.
- How many cups is 150g of baking soda?
- About ⅔ cup of baking soda.
- How many grams is ¼ cup of baking soda?
- 57.5 grams, a quarter of the 230 g in a full cup.
- How many cups is 10g of baking soda?
- 10 g of baking soda works out at roughly 2 1/8 tsp.