Baking soda — Teaspoons to Grams
One teaspoon of baking soda weighs about 4.58 grams, and one tablespoon is about 13.75 grams. Baking soda is denser than baking powder — one level teaspoon is about 4.6 grams. Use the converter below to switch baking soda between teaspoons, tablespoons, grams, ounces and more.
Also known as bicarbonate of soda or bicarb.
Baking soda conversion chart
| Amount | Grams | Ounces |
|---|---|---|
| ⅛ tsp | 0.573 g | 0.02 oz |
| ¼ tsp | 1.15 g | 0.04 oz |
| ½ tsp | 2.29 g | 0.081 oz |
| ¾ tsp | 3.44 g | 0.121 oz |
| 1 tsp | 4.58 g | 0.162 oz |
| 1 tbsp | 13.75 g | 0.485 oz |
| 2 tbsp | 27.5 g | 0.97 oz |
| ¼ cup | 55 g | 1.94 oz |
How to measure baking soda
Baking soda is denser than baking powder — one level teaspoon is about 4.6 grams.
Because a cup measures volume rather than weight, the most reliable way to measure baking soda is with a digital kitchen scale. If you are working from cups, keep your technique consistent every time so your results are repeatable. For more, see our guide on baking by weight versus volume.
No scale yet? You don't need a fancy one; any digital kitchen scale that reads in 1-gram steps does everything on this site. Well-rated kitchen scales on Amazon →
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Substitutes for baking soda
- No clean 1:1 swap exists. In a pinch: 3 tsp baking powder per 1 tsp baking soda (King Arthur Baking)Expect different texture, more leavening aftertaste, and reduced browning. Works only if the recipe already contains an acid (buttermilk, cocoa, brown sugar, lemon juice). Baking soda is cheap, lasts indefinitely sealed, and has no perfect substitute — buying more is the real fix.
See all baking soda substitutes, ratios and sources →
Compare baking soda
Baking soda conversions: FAQ
Why doesn't a teaspoon of baking soda weigh the same as a teaspoon of water?
Common baking soda conversions
Quick-answer pages for the conversions people search for most.
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* Conversion figures are typical average weights for one US customary cup (236.6 ml), based on the King Arthur Baking Ingredient Weight Chart and cross-referenced with the U.S. Department of Agriculture FoodData Central database. Actual weight varies with packing, brand and humidity — see our methodology.