Volumetric flow rate.
Imperial gallon per Seconds to Gallons per Millisecond Converter — imp gal/s to gal/ms
Convert Imperial gallon per Seconds (imp gal/s) to Gallon per Millisecond (gal/ms) using the exact conversion factor (1 imperial gallon per seconds = 0.0012009499 gallon per millisecond). See the formula, worked examples, and conversion table.
Imperial gallon per Seconds to 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 0.00454609 / 3.785411784.
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 Seconds to Gallons per Millisecond
Imperial gallon per Seconds and 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
gallons per millisecond = imperial gallon per seconds × 0.0012009499255
This factor comes from each unit's defined relationship to the category's base unit: 1 imperial gallon per seconds equals 0.00454609 base units, and 1 gallon per millisecond equals 3.785411784 base units, so dividing one by the other gives the direct imperial gallon per seconds-to-gallon per millisecond factor of 0.0012009499255.
Simple example
1 imp gal/s × 0.001200949926 = 0.0012009499 gal/ms
1 imperial gallon per seconds = 0.0012009499 gallons per millisecond.
Real-world example
60 imp gal/s × 0.001200949926 = 0.0720569955 gal/ms
60 imperial gallon per seconds = 0.0720569955 gallons per millisecond.
Conversion table
| Imperial gallon per Seconds (imp gal/s) | Gallon per Millisecond (gal/ms) |
|---|---|
| 0.1 imp gal/s | 0.000120095 gal/ms |
| 1 imp gal/s | 0.0012009499 gal/ms |
| 10 imp gal/s | 0.0120094993 gal/ms |
| 60 imp gal/s | 0.0720569955 gal/ms |
| 100 imp gal/s | 0.1200949926 gal/ms |
| 1,000 imp gal/s | 1.200949926 gal/ms |
Reverse conversion: Gallon per Millisecond to Imperial gallon per Seconds
0.0012009499 gal/ms × 832.6741846 = 0.9999999788 imp gal/s
0.0012009499 gallons per millisecond = 0.9999999788 imperial gallon per seconds.
imperial gallon per seconds = gallons per millisecond × 832.674184629
For a page dedicated to this direction, see Gallon per Millisecond to Imperial gallon per Seconds.
Understanding the Imperial gallon per Seconds (imp gal/s)
Volumetric flow rate.
Understanding the Gallon per Millisecond (gal/ms)
Volumetric flow rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many gallons per millisecond are in 1 imperial gallon per seconds?
1 imperial gallon per seconds equals 0.0012009499 gallons per millisecond, using the exact defined conversion factor rather than an estimate.
How do I convert imperial gallon per seconds to gallon per millisecond?
Multiply the imperial gallon per seconds value by 0.001200949926. The converter above does this instantly to whatever precision you set.
How do I convert gallon per millisecond back to imperial gallon per seconds?
Use the reverse factor: 1 gallon per millisecond equals 832.6741846 imperial gallon per seconds. You can also use the swap control in the converter above to flip the direction instantly.
What is a imperial gallon per seconds?
Imperial gallon per Seconds (imp gal/s) is a unit of flow rate.
What is a gallon per millisecond?
Gallon per Millisecond (gal/ms) is a unit of flow rate.
Is the imperial gallon per seconds to gallon per millisecond conversion exact?
Yes. Both imperial gallon per seconds and gallon per millisecond are defined by fixed standards rather than physical artifacts, so the factor of 0.001200949926 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.