Convert Imperial Gallon to Cubic Foot
Convert imperial gallons to cubic feet instantly. 1 imperial gallon = 0.1605436532 cubic foot — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Cubic Foot to Imperial Gallon converter for the reverse conversion.
Units explained
Imperial Gallon
The imperial gallon is defined as exactly 4.54609 liters.
Set by the British Weights and Measures Act of 1824 as the volume of 10 lb of water.
Used for fuel and beverages in the UK and Commonwealth.
UK, 1824.
Cubic Foot
A cubic foot is the volume of a cube one foot on a side (28.3168 L).
Derived by cubing the international foot (0.3048 m).
Used for natural gas, refrigerators, shipping and HVAC.
1959 yard agreement.
Imperial Gallon to Cubic Foot conversion formula
The relationship between imperial gallons and cubic feet:
To convert imperial gallons to cubic feet, multiply the value in imperial gallons by 0.1605436532. To reverse, multiply cubic feet by 6.228835459.
How to use this converter
Type a value into the calculator. The result in cubic feet updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Cubic Foot to Imperial Gallon converter for the reverse direction.
Step-by-step: convert imperial gallons to cubic feet
- Write down the value in imperial gallons (gal).
- Multiply that value by the factor 0.1605436532.
- The product is the equivalent value in cubic feet (ft³).
- To reverse, multiply the cubic foot value by 6.228835459.
Worked examples
Example 1 — Convert 1 gal to ft³:
1 × 0.1605436532 = 0.1605436532 ft³
Example 2 — Convert 100 gal to ft³:
100 × 0.1605436532 = 16.0543653236 ft³
Real-world example — Postcard and small-object dimensions
A postcard is about 5 imperial gallons wide. Converting to cubic feet is essential for international postal addressing forms that ask for dimensions in different units across countries.
5 gal × 0.1605436532 = 0.8027182662 ft³
Real-world example — Ruler-scale measurements
A 30-imperial gallon school ruler converts cleanly to cubic feet — useful when buying a desk accessory from a retailer whose product specs use a different unit.
30 gal × 0.1605436532 = 4.8163095971 ft³
Real-world example — Hardware-scale dimensions
A 10-imperial gallon fastener or component is about as long as a thumbnail. Mechanics and DIY enthusiasts convert between imperial gallons and cubic feet daily when mixing metric and imperial tools.
10 gal × 0.1605436532 = 1.6054365324 ft³
Imperial Gallon to Cubic Foot conversion table
Standard reference values for converting imperial gallons to cubic feet:
| Imperial Gallon [gal] | Cubic Foot [ft³] |
|---|---|
| 0.01 | 0.0016054365 |
| 0.1 | 0.0160543653 |
| 1 | 0.1605436532 |
| 2 | 0.3210873065 |
| 3 | 0.4816309597 |
| 4 | 0.6421746129 |
| 5 | 0.8027182662 |
| 10 | 1.6054365324 |
| 20 | 3.2108730647 |
| 30 | 4.8163095971 |
| 40 | 6.4217461294 |
| 50 | 8.0271826618 |
| 100 | 16.0543653236 |
| 500 | 80.2718266179 |
| 1000 | 160.5436532359 |
Frequently asked questions
How many cubic feet is 1 imperial gallon?
How do I convert imperial gallons to cubic feet?
How do I convert cubic feet back to imperial gallons?
How many cubic feet is 100 imperial gallons?
Popular volume unit conversions
Convert Imperial Gallon to other volume units
Show all Imperial Gallon conversions
Metric / SI (15 units)
US Customary (Liquid) (15 units)
US Customary (Dry) (5 units)
Imperial (UK) (13 units)
Cubic (length-derived) (4 units)
Cooking / Culinary (5 units)
Sources & references
Conversion factor (1 gal = 0.1605436532 ft³) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.