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Kitchen Converter • Fast • Browser-Based

Cups to Grams Converter (Water)

Convert US cups to grams instantly using water as the reference density. This tool is fast, mobile-friendly, and runs locally in your browser.

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Convert cups and grams

Type in either field to convert instantly. This version uses water as the density reference, so values for ingredients like flour, sugar, butter, or oats will differ.
cup
g
Higher decimals are useful for smaller measurements and more precise kitchen math.
This converter assumes water. For flour, sugar, rice, oats, cocoa, butter, and similar ingredients, grams per cup vary because density changes by ingredient.

How this cups to grams converter works

This converter uses the US cup measurement and assumes water as the reference ingredient. Since 1 US cup is approximately 236.588 milliliters and water has a near 1:1 milliliter-to-gram relationship, the conversion is straightforward.

That makes this tool reliable for water and useful as a quick baseline for general kitchen math. For dry ingredients and thicker liquids, actual grams per cup can vary significantly.

Common cups to grams conversions for water

  • 1 cup ≈ 236.59 g
  • 2 cups ≈ 473.18 g
  • 1/2 cup ≈ 118.29 g
  • 1/4 cup ≈ 59.15 g
  • 3 cups ≈ 709.76 g

Frequently asked questions

How many grams are in 1 US cup?

This converter uses water as the reference, so 1 US cup is approximately 236.588 grams.

Is this cups to grams conversion exact?

It is accurate for water using the US cup volume. For other ingredients such as flour, sugar, butter, and oats, grams per cup depend on density.

Why do ingredient conversions vary?

Different ingredients pack differently and have different densities. A cup of flour does not weigh the same as a cup of sugar or a cup of butter.

Does this tool store my data?

No. The conversion runs locally in your browser.