Baking Soda Cups to Ounces by Weight

Updated: July 25, 2026 · Source: King Arthur Baking Ingredient Weight Chart (Practical ingredient volume-to-weight reference used for the stated ingredient basis.)

Snapshot

1 cup of baking soda equals 10.16 ounces. Conversion Encyclopedia keeps one fixed ingredient basis on this page so the calculator, common values, and reverse page stay aligned.

  • Reference basis: 288 g per 1 US cup.
  • Example: For 1/2 US cup of baking soda, the result is about 5.08 ounces.
  • Source basis: King Arthur Baking Ingredient Weight Chart.

Use the interactive calculator below for custom values and the common-value table for quick checks.

Converter Calculator

10.16 Ounces

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Explanation

This page answers the kitchen question in weight terms: how much 1 US cup of baking soda weighs in ounces. It converts cup volume into weight ounces using one ingredient-specific factor instead of a generic chart.

It is measuring mass, not fluid ounces. That is especially useful in baking, where small measuring differences can change rise, set, and texture. The mirror page uses the same ounce-per-cup conversion in reverse so both directions stay aligned.

Conversion Basis

  • Multiply US cups by 10.16 ounces per cup, equivalent to the same 288-gram cup basis used by the related baking-soda converters.
  • For 1/2 US cup of baking soda, the result is about 5.08 ounces.
  • The snapshot, calculator, common values, and reverse route use the same conversion basis.
  • Source: King Arthur Baking Ingredient Weight Chart (Practical ingredient volume-to-weight reference used for the stated ingredient basis.)

Reference & Scope

The cited ingredient chart lists baking soda by spoon weight; the page keeps the resulting cup and ounce basis consistent across related routes.

  • Values are calculated from one explicit conversion basis.
  • Displayed results are rounded only after the underlying calculation.
  • Real measured materials and ingredients can vary from the stated reference basis.
  • Source: King Arthur Baking Ingredient Weight Chart (Practical ingredient volume-to-weight reference used for the stated ingredient basis.)

Common Conversion Values

CupsOunces
0.13 1.27
0.25 2.54
0.33 3.39
0.5 5.08
0.75 7.62
1 10.16
1.5 15.24
2 20.32

Frequently Asked Questions

How many ounces are in 1 cup of baking soda?

One US cup weighs about 10.16 ounces with this basis.

How many ounces are in half a cup of baking soda?

Half a cup weighs about 5.08 ounces.

Why can baking soda cup weight vary?

Settling, compaction, humidity, and measuring technique affect how much powder fits in a cup.