how many grams in a tablespoon of baking soda?

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things people ask

• Why would a recipe call for a whole tablespoon of baking soda?
  Most home baking recipes use a teaspoon or less, so a tablespoon usually means you are doing something specific: softening dried beans by soaking them overnight in a quart of water with 1 tablespoon (18 g) of baking soda, dunking pretzels in alkaline water before baking, or scaling a cookie or soda-bread recipe up by 4x to 6x. Commercial bakeries hit tablespoon volumes routinely.
• Can I substitute baking powder for the tablespoon if I run out?
  Not at a 1:1 weight. Baking powder is roughly a quarter as strong as baking soda by weight because it already contains an acid component and a buffer. To replace 1 tablespoon (18 g) of baking soda you need around 4 tablespoons of baking powder, and you should also drop any acidic ingredient — buttermilk, yogurt, lemon juice — that the soda was paired with.
• Is 18 g per tablespoon the same for an aluminum-free or natural brand?
  Yes. Baking soda is a single compound — sodium bicarbonate — and the aluminum-free label refers to baking powder, not baking soda, which never contains aluminum. Brand differences come down to particle size and packing density, not chemistry, so 18 g per spoon-and-level tablespoon holds across Arm & Hammer, Bob's Red Mill, and store-brand boxes.

related conversions

• Baking Soda: cups to grams
• Baking Soda: teaspoons to grams
• Baking Soda guide