---
title: "US gallons to US cups — gal to cup converter"
description: "1 US gallon = 16 US cups. Convert US gallons to US cups with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/gallons-to-cups/
site: "At One Place"
---

# US gallons to US cups

**1 US gallon in US cups: 1 gal = 16 cup**

cup = gal × 16

To convert US gallons to US cups, multiply by 16. The table below gives the values people look up most often, and the converter works for any number.

## US gallons to US cups table

*Common US gallon values converted to US cups.*

| US gallons | US cups |
| --- | --- |
| 1 gal | 16 |
| 2 gal | 32 |
| 3 gal | 48 |
| 4 gal | 64 |
| 5 gal | 80 |
| 10 gal | 160 |
| 15 gal | 240 |
| 20 gal | 320 |
| 25 gal | 400 |
| 30 gal | 480 |
| 40 gal | 640 |
| 50 gal | 800 |
| 75 gal | 1,200 |
| 100 gal | 1,600 |
| 250 gal | 4,000 |
| 500 gal | 8,000 |
| 1,000 gal | 16,000 |

## How the conversion works

The relationship is cup = gal × 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 gallon: US liquid gallon. The imperial gallon is about 20% larger.

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

## Common questions

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

One US gallon equals 16 US cups. cup = gal × 16.

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

Use cup = gal × 16. So 10 gal is 160 cup.

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

One US cup equals 0.0625 US gallons, which is the reverse of the conversion above.

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

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

## Related pages

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