Bicarbonate of Soda — Cups to Grams
1 cup of bicarbonate of soda = 288 grams
1 cup of bicarbonate of soda weighs approximately 288 grams. Use the converter below for custom amounts, or check the full conversion table.
Bicarbonate of Soda Converter
Result
288 g
Why Does Bicarbonate of Soda Weigh 288g Per Cup?
Bicarbonate of soda is denser than water — the fine powder packs relatively tightly. At 288g per cup versus water's 237g, it's noticeably heavier. However, since baking soda is used in tiny amounts (teaspoons, not cups), this density is mainly relevant for understanding that a little goes a long way.
A teaspoon of bicarbonate of soda (4.6g) weighs about the same as a teaspoon of salt. It's denser than baking powder (which contains filler ingredients), so you use less baking soda than baking powder in recipes. One teaspoon of baking soda has the leavening power of about 4 teaspoons of baking powder.
When Does Precision Matter for Bicarbonate of Soda?
Bicarbonate of soda precision is critical in all baking applications. Because it's so potent (about 4x stronger than baking powder), small measurement errors have big consequences. Too much baking soda creates a soapy, metallic taste and causes baked goods to rise too quickly then collapse. Too little means flat, dense results. The typical ratio is ¼ teaspoon baking soda per cup of flour when sufficient acid is present. In non-baking uses (cleaning, tenderizing meat), precision doesn't matter.
How to Measure Bicarbonate of Soda Correctly
Bicarbonate of soda should be measured using measuring spoons, levelled off with a straight edge. Never pack it down. Precision is critical — too much creates a soapy, metallic taste and can cause over-rising followed by collapse. Too little means flat, dense results. For accuracy, especially in small amounts, use a kitchen scale. One level teaspoon is about 4.6g.
Understanding Bicarbonate of Soda Measurements
Bicarbonate of soda (baking soda, sodium bicarbonate) is a pure leavening agent that requires an acid to activate. One teaspoon weighs approximately 4.6 grams, and one cup weighs about 288 grams. When combined with an acid (buttermilk, yoghurt, lemon juice, vinegar, brown sugar, honey, or cocoa), it produces carbon dioxide gas, which makes baked goods rise. Unlike baking powder, it's single-acting — it reacts immediately when wet, so you must bake promptly after mixing.
Common Uses in Baking & Cooking
Bicarbonate of soda is essential in recipes containing acidic ingredients: buttermilk pancakes, Irish soda bread, chocolate cake (cocoa is acidic), gingerbread (molasses is acidic), and cookies with brown sugar. It also promotes browning through the Maillard reaction, which is why baking soda cookies brown more than baking powder cookies. Beyond baking, it's used to tenderize meat, reduce acidity in tomato sauce, and help beans cook faster. If you need a substitute, see our Bicarbonate of Soda substitution guide.
Storage and Handling Tips
Store bicarbonate of soda in an airtight container in a cool, dry place — it absorbs odours and moisture. Replace every 6-12 months for baking, as it loses potency. To test freshness, mix ¼ teaspoon with 2 teaspoons of vinegar — it should bubble vigorously immediately. Old baking soda can still be used for cleaning and deodorizing.
Need to convert bicarbonate of soda to other units? Try our cups to grams converter or tablespoons to grams converter.
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Bicarbonate of Soda Conversion Table
| Amount | Grams | Ounces |
|---|---|---|
| 1 teaspoon | 6g | 0.21 oz |
| 1 tablespoon | 18g | 0.63 oz |
| ¼ cup | 72g | 2.54 oz |
| ⅓ cup | 96g | 3.39 oz |
| ½ cup | 144g | 5.08 oz |
| ⅔ cup | 192g | 6.77 oz |
| ¾ cup | 216g | 7.62 oz |
| 1 cup | 288g | 10.2 oz |
| 1½ cups | 432g | 15.2 oz |
| 2 cups | 576g | 20.3 oz |
Bicarbonate of Soda — US, Metric & UK Cup Conversions
Cup sizes vary by country. This table shows how much bicarbonate of soda weighs when measured with US cups (most online recipes), metric cups (Australia, NZ, Canada), or UK/Imperial cups.
| Amount | US Cup(236.6 ml) | Metric Cup(250 ml) | UK Cup(284 ml) |
|---|---|---|---|
| ¼ cup | 72g | 76.1g | 86.5g |
| ⅓ cup | 96g | 101g | 115g |
| ½ cup | 144g | 152g | 173g |
| ⅔ cup | 192g | 203g | 231g |
| ¾ cup | 216g | 228g | 259g |
| 1 cup | 288g | 304g | 346g |
| 1½ cups | 432g | 456g | 519g |
| 2 cups | 576g | 609g | 692g |
Note: US cups (236.6 ml) are standard in most online recipes. Metric cups (250 ml, used in Australia, NZ, Canada) hold 5.7% more. UK/Imperial cups (284 ml) hold 20% more than US cups.
Need a Substitute?
Out of bicarbonate of soda? We've got 1 tested alternative with exact ratios.
Frequently Asked Questions
What's the difference between bicarbonate of soda and baking powder?▼
Can I substitute baking powder for bicarbonate of soda?▼
Why do my baked goods taste metallic or soapy?▼
How many grams in 1 teaspoon of bicarbonate of soda?▼
Why does baking soda make cookies spread more?▼
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Values are approximate and can vary depending on how the ingredient is measured. For precision baking, we recommend using a digital kitchen scale.