how many grams in a cup of baking soda?

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conversion reference

things people ask

• Why does my bag of baking soda list a different gram weight per cup?
  Different sources publish different cup weights for baking soda: Bob's Red Mill lists 220 g, some industrial charts use 240 g, and King Arthur Baking lists 288 g. The variance comes from how tightly the powder is packed and whether it has been sifted. This calculator follows the King Arthur figure of 288 g per cup, so all conversions on this page resolve to that value.
• What does a cup of baking soda actually get used for?
  A full cup almost never appears in a recipe — even a triple batch of cookies tops out around a tablespoon. Cup-scale baking soda is for non-recipe uses: refilling a kitchen shaker, deodorizing a refrigerator, scrubbing an oven, mixing a cleaning paste with water, softening bath water, or scaling a commercial-volume cookie or pretzel run.
• How should I scoop the cup so the gram weight matches?
  Spoon the baking soda into the measuring cup loosely, then level the top with a straight edge. Do not pack it down or tap the cup on the counter — compacted baking soda can weigh 320 g or more per cup, which throws off the conversion. The 288 g figure assumes spoon-and-level, which is the standard King Arthur method.

related conversions

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