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Grams to Cups Converter

Grams measure mass and cups measure volume, so there is no universal grams-per-cup factor. Enter the density of your ingredient in its actual preparation. This page uses the US customary cup, exactly 236.5882365 mL, rather than a 240 mL label cup or a 250 mL metric cup.

Required. Use a measured or sourced value for the ingredient and its preparation. No ingredient density is assumed.

Use nonnegative decimals or fractions, up to 64 characters and 10¹² per quantity. Density must be positive, at most 10⁶ g/mL. No ingredient density is assumed. Results display up to 12 significant digits.

Calculation result

Enter a density in g/mL to convert grams and US customary cups.

Cups = grams ÷ entered density (g/mL) ÷ 236.5882365; grams = cups × 236.5882365 × density.

Primary source: NIST SP 811 §8.3: mass density = mass / volume. NIST SP 811 conversion factors supplies the unit definitions. NIST SP 1038, footnote 19 defines the US customary cup in US fluid ounces.

Worked example: At an entered density of 0.5 g/mL, 118.29411825 g ÷ 0.5 ÷ 236.5882365 = 1 US cup. At 1 g/mL, 473.176473 g = 2 US cups.

How to use this tool

Enter grams and a positive density in grams per milliliter, then select Calculate. Choose the reverse direction to turn US customary cups into grams. Packing, temperature and ingredient preparation can change density.

Frequently asked questions

Why do I have to enter density?

Density relates mass to volume. Flour, sugar and liquids have different densities; packing and preparation can change them. This calculator supplies no ingredient presets.

Which cup does this page use?

The US customary cup is exactly 236.5882365 mL. A 250 mL metric cup and a 240 mL nutrition-label cup differ.

Is this calculator free and private?

Yes. Arithmetic runs on your device. Your entries are not uploaded or saved to browser storage, and no sign-up is needed.