Sourdough cups to grams

Flour, water, starter and salt — cups, spoons and grams, both ways.

Ingredient

Bread flour

All-purpose flour

Whole wheat flour

Rye flour (medium)

Water

Sourdough starter

Salt (fine / table)

Sugar (granulated)

Cups

Tbsp

Tsp

Grams

Amount

cups

1 cups of bread flour is

120 g

The chart

Bread flour

1 cup = 120 g

½ cup = 60 g

⅓ cup = 40 g

¼ cup = 30 g

1 tbsp = 7.5 g

1 tsp = 2.5 g

All-purpose flour

1 cup = 120 g

½ cup = 60 g

⅓ cup = 40 g

¼ cup = 30 g

1 tbsp = 7.5 g

1 tsp = 2.5 g

Whole wheat flour

1 cup = 113 g

½ cup = 57 g

⅓ cup = 38 g

¼ cup = 28 g

1 tbsp = 7.1 g

1 tsp = 2.4 g

Rye flour (medium)

1 cup = 106 g

½ cup = 53 g

⅓ cup = 35 g

¼ cup = 27 g

1 tbsp = 6.6 g

1 tsp = 2.2 g

Water

1 cup = 227 g

½ cup = 114 g

⅓ cup = 76 g

¼ cup = 57 g

1 tbsp = 14 g

1 tsp = 4.7 g

Sourdough starter

1 cup = 227 g

½ cup = 114 g

⅓ cup = 76 g

¼ cup = 57 g

1 tbsp = 14 g

1 tsp = 4.7 g

Salt (fine / table)

1 cup = 288 g

½ cup = 144 g

⅓ cup = 96 g

¼ cup = 72 g

1 tbsp = 18 g

1 tsp = 6 g

Sugar (granulated)

1 cup = 198 g

½ cup = 99 g

⅓ cup = 66 g

¼ cup = 50 g

1 tbsp = 12 g

1 tsp = 4.1 g

A spooned and levelled US cup, from King Arthur Baking’s ingredient weight chart.

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How it works

A cup of flour weighs much less than a cup of water, so every ingredient converts differently. These are King Arthur Baking’s weights for a spooned and levelled cup.

Grams are more exact — a cheap kitchen scale makes sourdough far more predictable — but cups work.

Questions

How many grams is a cup of flour?

King Arthur Baking weighs a spooned and levelled cup of all-purpose or bread flour at 120 g, whole wheat at 113 g and medium rye at 106 g.

How much does a cup of sourdough starter weigh?

About 227 g — King Arthur gives 227–241 g, depending on how bubbly it is. That is why weighing is better than measuring by the cup.

How do I measure flour without a scale?

Stir the flour to loosen it, spoon it into the cup without pressing, and level the top with a knife. Scooping straight from the bag packs in up to a quarter more.

Sources

Ingredient Weight Chart

King Arthur Baking

Checked September 30, 2026. The figures are the bakers’; the model and the words are ours. Watch the dough, not the clock.

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