Volume conversion
Cubic foot to Imperial gallon converter
Convert ft³ to imp gal instantly, choose the displayed precision, and verify the result with the formula and reference table below.
Imperial gallon (imp gal)
Rounded for display only; calculations retain full precision.
Rounding and precision rules
- Convr calculates first and rounds the displayed result only once, at the final step.
- The default is a maximum of 6 decimal places; trailing zeros are removed.
- Very small values that would appear as zero, and values of 10¹² or more, use scientific notation.
- Display precision is not measurement uncertainty. For scientific, engineering, or regulated work, retain only the digits justified by the source measurement.
Calculation
Cubic foot to Imperial gallon formula
imp gal = ft³ × 6.228835
Calculations retain full precision and the result is rounded only for display.
Worked example
For 10 ft³, the result is 62.288355 imp gal. Substitute 10 ft³ into the formula to obtain 62.288355 imp gal.
A numerical value expressed in imperial gallon is usually larger than the same measurement expressed in cubic foot, because 1 ft³ equals 6.228835 imp gal.
Cubic foot to Imperial gallon reference table
Common values rounded to a maximum of 6 decimal places.
| Cubic foot (ft³) | Imperial gallon (imp gal) |
|---|---|
| 1 ft³ | 6.228835 imp gal |
| 5 ft³ | 31.144177 imp gal |
| 10 ft³ | 62.288355 imp gal |
| 50 ft³ | 311.441773 imp gal |
| 100 ft³ | 622.883546 imp gal |
Understanding the units
About Cubic foot and Imperial gallon
Cubic foot (ft³)
One cubic foot (ft³) equals 28.316846592 L, the base relationship used for this volume conversion.
Imperial gallon (imp gal)
One imperial gallon (imp gal) equals 4.54609 L, the base relationship used for this volume conversion.
When this conversion is useful
Cubic foot to Imperial gallon conversion is useful for recipes, beverage quantities, fuel volumes, laboratory measurements, and container capacities. It lets you compare the same volume or capacity across documents, tools, or standards that use different units.
Learn with Convr
Conversion guides
Metric vs Imperial Units: A Practical Comparison
Understand how metric, US customary, and Imperial units differ, where each system is used, and how to convert between them reliably.
Read guide →Everyday conversionsUS Gallons vs Imperial Gallons: What Is the Difference?
Compare US liquid gallons and Imperial gallons, understand their exact liter values, and avoid common fuel and recipe conversion errors.
Read guide →Answers at a glance
Frequently asked questions
How do you convert Cubic foot to Imperial gallon?
Use the formula imp gal = ft³ × 6.228835. Enter any value in the converter above to calculate the result instantly.
How many imperial gallon are in one cubic foot?
One cubic foot equals 6.228835 imperial gallon.
How does Convr round Cubic foot to Imperial gallon results?
Convr keeps full numeric precision during the calculation and rounds only the displayed result. The default is a maximum of 6 decimal places, with selectable precision on this page.
Can I convert negative or decimal cubic foot values?
Yes. The converter accepts positive, negative, decimal, and scientific-notation values. Negative values are physically meaningful for some scales, such as temperature, but not for every measured quantity.
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