Instant, two-way conversion across common engineering units.
1 imp gal = 1.2009499 US gal(Imperial gallon → US gallon)
To convert imperial gallons to US gallons, multiply the value by 1.2009499. Volume conversions matter for concrete pours, excavation, tank capacity and airflow, where a rounding slip becomes a delivery error.
The imperial gallon is the UK liquid volume unit and is about 20 percent larger than the US gallon.
The US gallon is the liquid volume unit used in the United States.
1 imp gal equals 1.2009499 US gal.
Multiply the value by 1.2009499. For example, 10 imp gal equals 12.009499 US gal.
1 US gal equals 0.83267418 imp gal. The converter above works in both directions, so you can type into either field.
The US gallon comes from the old English wine gallon of 231 cubic inches, while the imperial gallon was redefined in 1824. The imperial gallon is about 20 percent larger.
Cubic meters are the standard ordering unit for concrete and excavation in metric practice; cubic yards serve the same role in the US.
Yes. Every unit conversion runs in your browser, needs no account and is free for professional use.