Volumetric flow rate.
Imperial gallon per Hours to Cubic Millimeter per Seconds Converter — imp gal/h to mm3/s
Convert Imperial gallon per Hours (imp gal/h) to Cubic Millimeter per Seconds (mm3/s) using the exact conversion factor (1 imperial gallon per hours = 1,262.802778 cubic millimeter per seconds). See the formula, worked examples, and conversion table.
Imperial gallon per Hours to Cubic Millimeter per Seconds converter
Converter
Flow Rate Converter
Convert volumetric flow rates across metric, US, imperial, industrial, and scientific units.
Context values
Some unit families need one extra value for a physically accurate result.
Volumetric flow rate.
Result = input x 1.26280278e-6 / 1e-9.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Imperial gallon per Hours to Cubic Millimeter per Seconds
Imperial gallon per Hours and Cubic Millimeter per Seconds both measure volumetric flow rate — how much volume passes a point over time — used to size pipes and pumps, monitor river or stream discharge, control industrial processes, and set medical infusion rates. Both are volumetric flow rate units.
Formula
cubic millimeter per seconds = imperial gallon per hours × 1262.80277778
This factor comes from each unit's defined relationship to the category's base unit: 1 imperial gallon per hours equals 0.00000126280277778 base units, and 1 cubic millimeter per seconds equals 1e-9 base units, so dividing one by the other gives the direct imperial gallon per hours-to-cubic millimeter per seconds factor of 1262.80277778.
Simple example
1 imp gal/h × 1262.802778 = 1,262.802778 mm3/s
1 imperial gallon per hours = 1,262.802778 cubic millimeter per seconds.
Real-world example
60 imp gal/h × 1262.802778 = 75,768.16667 mm3/s
60 imperial gallon per hours = 75,768.16667 cubic millimeter per seconds.
Conversion table
| Imperial gallon per Hours (imp gal/h) | Cubic Millimeter per Seconds (mm3/s) |
|---|---|
| 0.1 imp gal/h | 126.2802778 mm3/s |
| 1 imp gal/h | 1,262.802778 mm3/s |
| 10 imp gal/h | 12,628.02778 mm3/s |
| 60 imp gal/h | 75,768.16667 mm3/s |
| 100 imp gal/h | 126,280.2778 mm3/s |
| 1,000 imp gal/h | 1,262,802.778 mm3/s |
Reverse conversion: Cubic Millimeter per Seconds to Imperial gallon per Hours
1 mm3/s × 0.0007918892939 = 0.0007918893 imp gal/h
1 cubic millimeter per seconds = 0.0007918893 imperial gallon per hours.
imperial gallon per hours = cubic millimeter per seconds × 0.000791889293877
For a page dedicated to this direction, see Cubic Millimeter per Seconds to Imperial gallon per Hours.
Understanding the Imperial gallon per Hours (imp gal/h)
Volumetric flow rate.
Understanding the Cubic Millimeter per Seconds (mm3/s)
Volumetric flow rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many cubic millimeter per seconds are in 1 imperial gallon per hours?
1 imperial gallon per hours equals 1,262.802778 cubic millimeter per seconds, using the exact defined conversion factor rather than an estimate.
How do I convert imperial gallon per hours to cubic millimeter per seconds?
Multiply the imperial gallon per hours value by 1262.802778. The converter above does this instantly to whatever precision you set.
How do I convert cubic millimeter per seconds back to imperial gallon per hours?
Use the reverse factor: 1 cubic millimeter per seconds equals 0.0007918893 imperial gallon per hours. You can also use the swap control in the converter above to flip the direction instantly.
What is a imperial gallon per hours?
Imperial gallon per Hours (imp gal/h) is a unit of flow rate.
What is a cubic millimeter per seconds?
Cubic Millimeter per Seconds (mm3/s) is a unit of flow rate.
Is the imperial gallon per hours to cubic millimeter per seconds conversion exact?
Yes. Both imperial gallon per hours and cubic millimeter per seconds are defined by fixed standards rather than physical artifacts, so the factor of 1262.802778 used above is exact to as many digits as you choose to display.
What's the difference between volumetric and mass flow rate?
Volumetric flow rate measures the volume of fluid passing a point per unit time (for example, liters per second). Mass flow rate measures the mass instead. For a fluid of constant density the two are directly proportional, but for compressible fluids like gases, mass flow is often the more meaningful quantity.