How many grams are in 1 US cup?

This converter uses water as the reference: 1 US cup ≈ 236.588 grams.

Is this cups to grams conversion exact?

It is exact for water using the US cup volume. For other ingredients, grams per cup varies by density.

No. The conversion runs locally in your browser.

Convert US cups to grams instantly (water). Fast, mobile-friendly, privacy-first — runs locally in your browser.

Note: This page assumes water density. For flour/sugar/etc, grams per cup differs.

Cups (US)

cup

Grams (water)

Decimals

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Formula: grams = cups × 236.5882365 (US cup, water).

Type in either field to convert instantly. This tool runs locally in your browser.