---
title: "US cups to US gallons — cup to gal converter"
description: "1 US cup = 0.0625 US gallons. Convert US cups to US gallons with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/cups-to-gallons/
site: "At One Place"
---

# US cups to US gallons

**1 US cup in US gallons: 1 cup = 0.0625 gal**

gal = cup × 1/16

To convert US cups to US gallons, multiply by 0.0625. The table below gives the values people look up most often, and the converter works for any number.

## US cups to US gallons table

*Common US cup values converted to US gallons.*

| US cups | US gallons |
| --- | --- |
| 1 cup | 0.0625 |
| 2 cup | 0.125 |
| 3 cup | 0.1875 |
| 4 cup | 0.25 |
| 5 cup | 0.3125 |
| 10 cup | 0.625 |
| 15 cup | 0.9375 |
| 20 cup | 1.25 |
| 25 cup | 1.5625 |
| 30 cup | 1.875 |
| 40 cup | 2.5 |
| 50 cup | 3.125 |
| 75 cup | 4.6875 |
| 100 cup | 6.25 |
| 250 cup | 15.625 |
| 500 cup | 31.25 |
| 1,000 cup | 62.5 |

## How the conversion works

The relationship is gal = cup × 1/16. Both units measure volume, so the conversion is a fixed factor that never changes. The figure is exact rather than approximate: since the international yard and pound agreement of 1959, an inch is defined as exactly 25.4 millimetres and a pound as exactly 0.45359237 kilograms, and every other imperial and US customary unit here is derived from those two.

> US cup: US legal cup is 240 mL; the customary cup used here is 236.588 mL.

> US gallon: US liquid gallon. The imperial gallon is about 20% larger.

## Common questions

### How many US gallons are in one US cup?

One US cup equals 0.0625 US gallons. gal = cup × 1/16.

### How do you convert US cups to US gallons?

Use gal = cup × 1/16. So 10 cup is 0.625 gal.

### How many US cups are in one US gallon?

One US gallon equals 16 US cups, which is the reverse of the conversion above.

### Is there more than one kind of US cup?

US legal cup is 240 mL; the customary cup used here is 236.588 mL. US liquid gallon. The imperial gallon is about 20% larger.

## Related pages

- [US gallons to US cups](https://atoneplace.net/convert/gallons-to-cups/)
- [US cups to Liters](https://atoneplace.net/convert/cups-to-liters/)
- [US cups to Milliliters](https://atoneplace.net/convert/cups-to-ml/)
- [US cups to Cubic meters](https://atoneplace.net/convert/cups-to-cubic-meters/)
- [US cups to US quarts](https://atoneplace.net/convert/cups-to-quarts/)
- [US cups to US pints](https://atoneplace.net/convert/cups-to-pints/)
- [US cups to US fluid ounces](https://atoneplace.net/convert/cups-to-fl-oz/)
- [US cups to Tablespoons](https://atoneplace.net/convert/cups-to-tablespoons/)
- [US cups to Teaspoons](https://atoneplace.net/convert/cups-to-teaspoons/)

## Sources

- Guide for the Use of the International System of Units (SP 811) — NIST (https://www.nist.gov/pml/special-publication-811) [Public domain (US Government)]
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures (https://www.bipm.org/en/publications/si-brochure)
- Calculated on this page — At One Place (/about/)