CupsToGrams kitchen card
1 US cup = 240 ml, 1 tablespoon = 15 ml, 1 teaspoon = 5 ml. Figures verified 5 August 2026. https://cupsngrams.com/baking-soda
Baking Soda: Cups to Grams
Also called bicarbonate of soda, bicarb or bicarb soda.
One US cup (240 ml) of baking soda weighs 220 grams; half a cup weighs 110 grams. A quarter cup is 55 grams, a tablespoon is 13.8 grams and a teaspoon is 4.58 grams. These numbers are for baking soda only, because a cup measures volume, not weight.
220 g
1 cup of baking soda = 220 g (US legal cup, 240 ml)
1 cup of baking soda = 220 g (US legal cup, 240 ml)
Based on baking soda at 220 g per US cup.
CupsToGrams, cupsngrams.com
Baking from a UK, Australian or New Zealand recipe? Their cup is not the American one. Pick the standard your recipe assumes and every cup figure follows it.
Baking Soda conversion table
| Cups | Cups (decimal) | Grams | Tablespoons | Millilitres | Ounces (weight) |
|---|---|---|---|---|---|
| 1/8 cup | 0.125 | 27.5 g | 2 tbsp | 30 ml | 0.97 oz |
| 1/4 cup | 0.25 | 55 g | 4 tbsp | 60 ml | 1.94 oz |
| 1/3 cup | 0.33 | 73.3 g | 5.33 tbsp | 80 ml | 2.59 oz |
| 1/2 cup | 0.5 | 110 g | 8 tbsp | 120 ml | 3.88 oz |
| 2/3 cup | 0.67 | 147 g | 10.7 tbsp | 160 ml | 5.17 oz |
| 3/4 cup | 0.75 | 165 g | 12 tbsp | 180 ml | 5.82 oz |
| 1 cup | 1 | 220 g | 16 tbsp | 240 ml | 7.76 oz |
| 1 1/4 cups | 1.25 | 275 g | 20 tbsp | 300 ml | 9.7 oz |
| 1 1/3 cups | 1.33 | 293 g | 21.3 tbsp | 320 ml | 10.3 oz |
| 1 1/2 cups | 1.5 | 330 g | 24 tbsp | 360 ml | 11.6 oz |
| 1 2/3 cups | 1.67 | 367 g | 26.7 tbsp | 400 ml | 12.9 oz |
| 1 3/4 cups | 1.75 | 385 g | 28 tbsp | 420 ml | 13.6 oz |
| 2 cups | 2 | 440 g | 32 tbsp | 480 ml | 15.5 oz |
| 2 1/4 cups | 2.25 | 495 g | 36 tbsp | 540 ml | 17.5 oz |
| 2 1/2 cups | 2.5 | 550 g | 40 tbsp | 600 ml | 19.4 oz |
| 3 cups | 3 | 660 g | 48 tbsp | 720 ml | 23.3 oz |
| 3 2/3 cups | 3.67 | 807 g | 58.7 tbsp | 880 ml | 28.5 oz |
Ounces here are ounces of weight (1 oz = 28.35 g), not fluid ounces. One US cup is 8 fluid ounces of volume whatever is in it, but what it weighs in ounces depends on the ingredient: a cup of baking soda weighs about 7.76 oz. Why these two are not the same. Decimals for thirds are rounded (1/3 cup is 0.333 cups), and each linked amount opens a page comparing every ingredient at that measure.
Cite this: CupsToGrams, "Baking Soda: Cups to Grams", https://cupsngrams.com/baking-soda, figures verified . The data is free to reuse under CC BY 4.0 with a link back to this page.
About measuring baking soda
Baking soda is a dense, fine powder, so a full cup weighs about 220 grams. In practice you almost never measure a cup of it: recipes call for teaspoons, and one teaspoon is about 4.6 grams. Precision matters more than for most ingredients, because too much baking soda leaves a soapy, metallic taste and can make a bake rise then collapse. When you scale a recipe up or down, weighing the leavening keeps the balance right.
Baking soda is powerful. Too much tastes soapy, so measure teaspoons carefully or weigh them.
How many grams is a cup of baking soda?
One US cup (240 ml) of baking soda weighs about 220 grams. Because a cup measures volume rather than weight, that figure is specific to baking soda and does not transfer to any other ingredient: the same cup holds 125 grams of all-purpose flour and 340 grams of honey.
- 1/4 cup of baking soda is about 55 grams
- 1/3 cup of baking soda is about 73 grams
- 1/2 cup of baking soda is about 110 grams
- 2/3 cup of baking soda is about 147 grams
- 3/4 cup of baking soda is about 165 grams
- 1 1/2 cups of baking soda is about 330 grams
- 2 cups of baking soda is about 440 grams
- 3 cups of baking soda is about 660 grams
Working the other way round, 100 grams of baking soda is about 0.455 cups, and 500 grams is about 2.27 cups.
Does it matter which cup my recipe means?
It does, though less than the ingredient itself. This page uses the US legal cup of 240 ml. An Australian metric cup is 250 ml, so a metric cup of baking soda comes to about 229 grams, and the old British imperial cup of 284.1 ml holds about 260 grams. See cup sizes by country for every standard side by side.
Frequently asked questions
How many grams is 1 cup of baking soda?
One US cup of baking soda is about 220 grams. It is a dense powder, though you rarely measure it by the cup.
How many grams is a teaspoon of baking soda?
About 4.6 grams. Baking soda is dense, so a level teaspoon carries more weight than the same spoon of a lighter powder.
Is baking soda the same as baking powder?
No. Baking soda is pure sodium bicarbonate, while baking powder mixes bicarbonate with an acid and starch. They are not interchangeable by weight.
Where this figure comes from
We have not yet found a published reference that states a weight for a cup of baking soda. The 220 grams on this page follows the calibration the rest of the site is built on, with butter at 227 grams per cup, water at 240, all-purpose flour at 125 and granulated sugar at 200. Treat it as a good working figure rather than a cited one. If you have a better source, tell us and we will check it and credit you.
Published figures for the same ingredient vary between references anyway, because how an ingredient is packed changes what a cup of it weighs. Treat any cup figure as accurate to within a few percent, and weigh on a scale when a recipe is sensitive. Our full approach is on the methodology page.
Figures last verified . Compiled by the CupsToGrams editorial team at FusionStudios. Spotted a value that looks off? Tell us.