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Cups to Grams Converter

Convert ingredient-specific cup measures to grams, or grams back to cups.

Your numbers

Make it your own
Updates as you type
Ingredient mass
120g

Calculated from your inputs · rounded for display

Assumed mass per selected cup120g
Cup volume236.5882mL

Ingredient weights are approximate, not universal densities. Flour is all-purpose, sugar granulated, brown sugar packed. Packing, brand and measurement change mass; use a scale or custom measured factor for precision.

Your calculation, step by step

No black boxes
  1. US customary cup = 236.5882365 mL; metric cup = 250 mL.
  2. Ingredient factor = 120 g per selected cup.
  3. 1 × 120 = 120.

How to use this calculator

  1. Enter your own values in the labeled fields. Check the units and assumptions before comparing results. Only the fields needed for your selected calculation mode are shown.
  2. Your answer updates automatically. Review the calculation steps to see exactly how it was calculated.
  3. Copy, share, save, or download your result. Saved inputs stay on this device.

How the calculation works

Grams = cups × ingredient mass per selected cup

Volume-to-mass conversion depends on the ingredient and how it is packed. Preset dry-ingredient factors are approximate baking references rather than universal densities. Metric cups are scaled from the US-cup factor by volume. A custom measured factor is preferable for a specific product; a kitchen scale avoids packing uncertainty.

A worked example

Two US cups of all-purpose flour at 120 g per cup correspond to approximately 240 g.

Reading your result

Use the main result together with its units and supporting figures. Display values are rounded; calculations keep their underlying precision. A change in inputs or assumptions can change the answer. Compare the step-by-step working with your intended use before relying on an estimate.

Frequently asked questions

Why not use one factor for all ingredients?

A cup of flour and a cup of sugar have different masses.

Can I reverse the conversion?

Yes. Choose grams to cups.

Sources & methodology

King Arthur Baking: ingredient weight chart ↗

Formula review: October 24, 2026. Read our methodology.