There are about 1.6 cups in a pound of Baking Soda. Baking Soda weighs 288 g per cup (spooned and levelled), so a pound — 453.59 g — divides to 1.57 cups. Sodium bicarbonate; needs an acid to activate. Leavening cakes, cookies and quick breads with acidic ingredients. Every figure on this page is approximate, because a cup measures volume and the weight depends on how the ingredient settles and how it was measured; when the amount matters — a cake, a sauce that must set, a dough that must rise — weigh the Baking Soda on a kitchen scale instead of trusting the cup. This page gives you the full table for a pound and beyond, worked examples from real recipes, the method behind the figure, and the mistakes that catch people out.

How many cups in a pound of Baking Soda?

A pound of Baking Soda is about 1.6 cups (1.57 cups, to be exact). The table below covers a quarter of a pound up to ten pounds, so you can read off whatever your recipe or your bulk buy calls for without doing the division yourself. If your recipe lists Baking Soda in grams, the same table works in reverse: find the grams and read across to the cups.

Amount Cups Grams Tablespoons Millilitres
0.25 lb 0.39 113 6 93
0.5 lb 0.79 227 13 186
0.75 lb 1.18 340 19 279
1 lb 1.57 454 25 373
2 lb 3.15 907 50 745
5 lb 7.87 2268 126 1863
10 lb 15.75 4536 252 3726

The tablespoons column is the useful one for small amounts: a pound of Baking Soda is about 25 tablespoons, and a single tablespoon weighs about 18.0 g. Use the pounds to grams converter if your recipe lists a different weight, and the cups to grams converter if you need the figure for a single cup of baking soda.

Worked examples

The examples below use real recipes, with the cups and the grams side by side so you can follow the maths in context. Each one also notes where the cup is good enough and where the scale earns its keep.

Chocolate chip cookies for a bake sale

Chocolate chip cookies for a bake sale need 1 tablespoon of Baking Soda — about 18 g — one teaspoon in a double batch of cookies. One teaspoon is about 6 g; baking soda needs an acid in the dough, such as brown sugar, or the cookies taste soapy.

Banana bread for the weekend

Banana bread for the weekend needs 1.5 tablespoons of Baking Soda — about 27 g — a teaspoon and a half in a loaf with very ripe bananas. A teaspoon and a half is about 9 g; ripe bananas bring the acid the soda needs, so under-ripe bananas make a denser loaf.

Buttermilk pancakes for a crowd

Buttermilk pancakes for a crowd need 1 tablespoon of Baking Soda — about 18 g — one teaspoon in a batter for about 16 pancakes. One teaspoon is about 6 g; the batter should hit the pan within minutes of mixing, or the bubbles escape and the pancakes go flat.

How the figure was measured

The weight figure on this page comes from King Arthur Baking: Baking Soda weighs 288 g per cup, measured spooned and levelled, and that figure carries high confidence in CookScale's 120-ingredient table. All weights are per US cup (236.6 ml), and every cup-based result on this page is approximate, because a cup measures volume while the weight depends on how the ingredient settles, how fresh it is, and how it was measured. When the amount matters — a cake, a sauce that must set, a dough that must rise — weigh the Baking Soda on a kitchen scale instead of trusting the cup. Read more about this ingredient on the Baking Soda hub, which covers its weight, its measures, its storage and its substitutes in one place.

How the maths works

The conversion is a single division: one pound is 453.59 g, and one cup of Baking Soda weighs 288 g, so 453.59 ÷ 288 = 1.57 cups. Going the other way, one cup of Baking Soda weighs 288 g, which is 0.63 lb, and one tablespoon weighs about 18.0 g while one teaspoon weighs about 6.00 g. To get any number of cups, weigh that many times 288 g: two cups is 576 g, three cups is 864 g, and half a cup is 144 g. In volume terms, a pound of Baking Soda is about 373 ml, since one US cup is 236.6 ml. Remember that the cup is a volume and the pound is a weight, so this maths only works because we know the density of Baking Soda; the same pound of a different ingredient would be a different number of cups entirely.

Practical guidance

Leavening loses strength with age and damp, so a pound of it is only a bargain if you bake often enough to use it while it is fresh. Airtight container, cool and dry, up to 6 months once opened. Test old baking soda with vinegar before baking; if it does not fizz hard, it will not lift a cake either. Date the tin when you open it, and test it before an important bake — a failed rise wastes the whole batch, not just the leavening.

How to measure it

Spoon Baking Soda into a dry measuring spoon and level it with a knife — never scoop the spoon through the tin, and never heap it. Leavening is the one ingredient where a careless spoonful changes the outcome: too much leaves a bitter or metallic taste and can make a cake rise and then collapse. One teaspoon of Baking Soda weighs about 6.00 g, so for large batches weigh it rather than counting spoonfuls.

Why recipes ask for a pound of Baking Soda

Baking soda is sold by weight in boxes, while recipes call for teaspoons, so the pound conversion is about understanding just how much leavening a box holds. A pound is only about one and a half cups, because baking soda is dense, and at a teaspoon per batch that is roughly 76 batches of cookies from a single pound.

Buying and storing a pound of Baking Soda

A pound of leavening is a professional quantity for a home cook, but it is cheap, so the cost of the pound is rarely the issue — the issue is using it before it loses strength. If you bake weekly, a pound lasts a year; if you bake monthly, buy the small tin instead.

Frequently asked questions

How many teaspoons are in a pound of Baking Soda?

About 76 teaspoons. A pound of Baking Soda is about 1.57 cups, and there are 48 teaspoons in a cup, so 1.57 × 48 is about 76. A single teaspoon weighs about 6.00 g.

Can I use too much Baking Soda?

Yes, and it is the most common leavening mistake. Too much Baking Soda leaves a bitter, metallic or soapy taste and can make a cake rise fast and then collapse in the middle. Measure it level with a knife, never heaped, and never add extra 'for luck'.

How do I know if my Baking Soda is still active?

Drop half a teaspoon into a spoonful of vinegar. If it fizzes hard, it is still active; if it barely bubbles, replace the box.

How should I store a pound of Baking Soda?

In an airtight container in a cool, dry place. Airtight container, cool and dry, up to 6 months once opened. Date the tin when you open it, and test it before an important bake — a failed rise wastes the whole batch.

How much baking soda is in a tablespoon?

About 18 g — baking soda packs at 288 g per cup, and there are 16 tablespoons in a cup. A teaspoon is about 6 g, so a pound of baking soda is about 25 tablespoons or about 76 teaspoons.

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