Volumetric flow rate.
Imperial gallon per Hours to Imperial gallons per Millisecond Converter — imp gal/h to imp gal/ms
Convert Imperial gallon per Hours (imp gal/h) to Imperial gallon per Millisecond (imp gal/ms) using the exact conversion factor (1 imperial gallon per hours = 2.777778e-7 imperial gallon per millisecond). See the formula, worked examples, and conversion table.
Imperial gallon per Hours to Imperial gallons per Millisecond 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 / 4.54609.
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 Imperial gallons per Millisecond
Imperial gallon per Hours and Imperial gallon per Millisecond 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
imperial gallons per millisecond = imperial gallon per hours × 2.777778e-7
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 imperial gallon per millisecond equals 4.54609 base units, so dividing one by the other gives the direct imperial gallon per hours-to-imperial gallon per millisecond factor of 2.777778e-7.
Simple example
1 imp gal/h × 2.777778e-7 = 2.777778e-7 imp gal/ms
1 imperial gallon per hours = 2.777778e-7 imperial gallons per millisecond.
Real-world example
60 imp gal/h × 2.777778e-7 = 0.0000166667 imp gal/ms
60 imperial gallon per hours = 0.0000166667 imperial gallons per millisecond.
Conversion table
| Imperial gallon per Hours (imp gal/h) | Imperial gallon per Millisecond (imp gal/ms) |
|---|---|
| 0.1 imp gal/h | 2.777778e-8 imp gal/ms |
| 1 imp gal/h | 2.777778e-7 imp gal/ms |
| 10 imp gal/h | 0.0000027778 imp gal/ms |
| 60 imp gal/h | 0.0000166667 imp gal/ms |
| 100 imp gal/h | 0.0000277778 imp gal/ms |
| 1,000 imp gal/h | 0.0002777778 imp gal/ms |
Reverse conversion: Imperial gallon per Millisecond to Imperial gallon per Hours
2.777778e-7 imp gal/ms × 3600000 = 1.00000008 imp gal/h
2.777778e-7 imperial gallons per millisecond = 1.00000008 imperial gallon per hours.
imperial gallon per hours = imperial gallons per millisecond × 3600000
For a page dedicated to this direction, see Imperial gallon per Millisecond to Imperial gallon per Hours.
Understanding the Imperial gallon per Hours (imp gal/h)
Volumetric flow rate.
Understanding the Imperial gallon per Millisecond (imp gal/ms)
Volumetric flow rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many imperial gallons per millisecond are in 1 imperial gallon per hours?
1 imperial gallon per hours equals 2.777778e-7 imperial gallons per millisecond, using the exact defined conversion factor rather than an estimate.
How do I convert imperial gallon per hours to imperial gallon per millisecond?
Multiply the imperial gallon per hours value by 2.777778e-7. The converter above does this instantly to whatever precision you set.
How do I convert imperial gallon per millisecond back to imperial gallon per hours?
Use the reverse factor: 1 imperial gallon per millisecond equals 3,600,000 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 imperial gallon per millisecond?
Imperial gallon per Millisecond (imp gal/ms) is a unit of flow rate.
Is the imperial gallon per hours to imperial gallon per millisecond conversion exact?
Yes. Both imperial gallon per hours and imperial gallon per millisecond are defined by fixed standards rather than physical artifacts, so the factor of 2.777778e-7 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.