---
title: "Cubic feet to US gallons — ft³ to gal converter"
description: "1 cubic foot = 7.480519 US gallons. Convert cubic feet to US gallons with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/cubic-feet-to-gallons/
site: "At One Place"
---

# Cubic feet to US gallons

**1 cubic foot in US gallons: 1 ft³ = 7.480519 gal**

gal = ft³ × 7.480519481

To convert cubic feet to US gallons, multiply by 7.480519481. The table below gives the values people look up most often, and the converter works for any number.

## Cubic feet to US gallons table

*Common cubic foot values converted to US gallons.*

| Cubic feet | US gallons |
| --- | --- |
| 1 ft³ | 7.480519 |
| 2 ft³ | 14.96104 |
| 3 ft³ | 22.44156 |
| 4 ft³ | 29.92208 |
| 5 ft³ | 37.4026 |
| 10 ft³ | 74.80519 |
| 15 ft³ | 112.2078 |
| 20 ft³ | 149.6104 |
| 25 ft³ | 187.013 |
| 30 ft³ | 224.4156 |
| 40 ft³ | 299.2208 |
| 50 ft³ | 374.026 |
| 75 ft³ | 561.039 |
| 100 ft³ | 748.0519 |
| 250 ft³ | 1,870.1299 |
| 500 ft³ | 3,740.2597 |
| 1,000 ft³ | 7,480.5195 |

## How the conversion works

The relationship is gal = ft³ × 7.480519481. 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.

## Common questions

### How many US gallons are in one cubic foot?

One cubic foot equals 7.480519 US gallons. gal = ft³ × 7.480519481.

### How do you convert cubic feet to US gallons?

Use gal = ft³ × 7.480519481. So 10 ft³ is 74.80519 gal.

### How many cubic feet are in one US gallon?

One US gallon equals 0.13368 cubic feet, 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.

## Related pages

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