How many UK gallons are in one cubic foot?

One cubic foot equals approximately 6.2288 imperial (UK) gallons. The precise factor is 6.228835459… UK gallons per cubic foot, derived from 1 UK gallon = 4.54609 liters and 1 cubic foot = 28.316846592 liters.

What is the difference between a UK gallon and a US gallon?

A UK (imperial) gallon is 4.54609 liters, while a US liquid gallon is 3.785411784 liters. They are about 20% different in volume, so always confirm which gallon standard applies to your project.

Is this converter exact?

Yes. The conversion uses the legally defined values: 1 ft = 0.3048 m (exact), giving 1 ft³ = 28.316846592 L (exact), and 1 UK gallon = 4.54609 L (exact). The resulting factor 6.228835459… is then applied with full floating-point precision.

Can I convert UK gallons back to cubic feet?

Yes — use the swap button in the converter to reverse the direction. One UK gallon equals approximately 0.16054 cubic feet.

Where is the imperial gallon used?

The imperial (UK) gallon is the legal gallon in the United Kingdom, Canada (for some products), and several Commonwealth countries. It differs from the US gallon used in the United States.

Cubic Feet to UK Gallons Converter

Name: Cubic Feet to UK Gallons Converter
Availability: InStock
Author: Nham Vu

Enter a value in cubic feet and instantly get the equivalent in imperial (UK) gallons.

Enter a Value to Convert

Cubic Feet (ft³)

ft³

Imperial (UK) Gallons

gal

Result

UK Gallons

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Formula: UK gallons = ft³ × 6.228835459

Quick Reference

ft³	UK gal

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Summary

Enter a value in cubic feet and instantly get the equivalent in imperial (UK) gallons.

How it works

Enter a value in the cubic feet input field.
The converter multiplies your value by 6.22884 (exact: 1 ft³ = 6.228835459… UK gallons).
The result in UK gallons appears instantly below.
Use the swap button to convert UK gallons back to cubic feet.
Click the copy icon to copy the result to your clipboard.

Use cases

Convert water tank or cistern volumes from cubic feet to imperial gallons.
Calculate fuel storage capacity for UK-standard containers.
Convert aquarium dimensions measured in feet to UK gallon capacity.
Verify plumbing or HVAC flow volumes in imperial units.
Convert construction or excavation volumes for UK water-supply projects.

Frequently Asked Questions

Last updated: 2026-06-09 · Reviewed by Nham Vu