15g Baking Soda to Cups
15 grams of baking soda is a small amount, best measured with a spoon rather than a full cup. At 230g per cup, it works out to 1.0 tablespoons.
- Cups (US Customary)
- 0.07 (⅛)
- Tablespoons
- 1.0
- Teaspoons
- 3.1
- Milliliters
- 15 ml
15 grams of baking soda = 0.07 cups (⅛ cup / 1.0 tbsp / 3.1 tsp)
Baking Soda has a density of approximately 230g per cup. Usually measured in teaspoons rather than cups in recipes. Source: USDA FoodData Central. This is the figure used everywhere on this page, including the tablespoon and teaspoon values, so the numbers stay consistent whether you're reading the summary line, the table, or the FAQ answers below.
| Grams | Cups | Fraction | Tablespoons | Teaspoons |
|---|---|---|---|---|
| 9g | 0.04 | ⅛ | 0.6 | 1.9 |
| 10g | 0.04 | ⅛ | 0.7 | 2.1 |
| 15g | 0.07 | ⅛ | 1.0 | 3.1 |
| 20g | 0.09 | ⅛ | 1.4 | 4.2 |
| 25g | 0.11 | ⅛ | 1.7 | 5.2 |
The Math for 15g of Baking Soda
15g divided by 230g (the weight of one cup of baking soda) equals 0.07 cups. Multiplying that by 16 gives 1.0 tablespoons, and by 48 gives 3.1 teaspoons, since one cup always equals 16 tablespoons or 48 teaspoons regardless of the ingredient.
Baking Soda is lighter than water, which weighs about 236g per cup. That's why 15g of baking soda takes up more volume (15ml) than the same weight of water would (15ml). For a side-by-side look at how other ingredients compare, see the 15 grams to cups page.
Metric and Imperial Cup Sizes
The 0.07 cup figure above uses the US Customary cup (236.588ml). Recipes written outside the US sometimes use a metric cup (250ml) or an imperial (uk) cup (284.131ml) instead. At 15g, that's ⅛ metric cups or ⅛ imperial cups of baking soda, close to the US figure but not identical. The cup standard switch in the converter above recalculates this instantly for any gram amount.
Making More or Less Than 15g
Doubling a recipe that calls for 15g of baking soda means weighing 30g, or measuring 0.13 cups if you're working by volume instead of weight. Halving it means 7.5g, or 0.03 cups. Weight scales exactly with simple multiplication; cup measurements compound any scooping error each time they're doubled or halved, so weighing is more reliable the more a recipe is scaled.
How Baking Soda Compares to Similar Ingredients
Within dry goods, density still varies by ingredient. At 15g, baking powder (192g per cup) measures ⅛ cup, while active dry yeast (192g per cup) measures ⅛ cup, compared to ⅛ cup for baking soda. Swapping ingredients in a recipe by cup measurement alone, without adjusting for this difference, changes the actual weight used.
Typical Uses for Baking Soda
- Most cookie recipes use just 4g to 6g (about 1 teaspoon) of baking soda.
- Quick breads typically call for 5g to 8g per loaf.
- Pancake batter usually needs 4g to 5g for a full batch.
Getting an Accurate Spoon Measurement
Dry Goods
Spoon into the cup and level off. Ingredients like cocoa powder benefit from a quick sift first to break up clumps.
For exact results
Baking soda and baking powder should always be measured with a dry measuring spoon, leveled flat — a heaping spoonful of either can meaningfully change how a baked good rises.
For every gram amount at once, the baking soda conversion chart lists baking soda across the full range from 1g to 1000g in one table.
Frequently Asked Questions
What is 15 grams of baking soda in cups?+
15 grams of baking soda is 0.07 cups, or 1.0 tablespoons.
Should I use a spoon or a cup for 15g of baking soda?+
At 15g, a tablespoon or teaspoon measurement is usually more practical than a fractional cup. Use 1.0 tablespoons or 3.1 teaspoons.
Is 15 grams of baking soda the same as 15 milliliters?+
Only if it weighed the same as water. 15g of water is about 15ml, while 15g of baking soda is 15ml, because the two have different densities.
Does the answer change for a metric or imperial cup?+
Slightly. 15g of baking soda is ⅛ metric cups or ⅛ imperial cups, close to the US figure but not identical, since each standard defines the cup at a different volume.