Volumetric flow rate.
Gallon per Minutes to Imperial gallons per Millisecond Converter — gal/min to imp gal/ms
Convert Gallon per Minutes (gal/min) to Imperial gallon per Millisecond (imp gal/ms) using the exact conversion factor (1 gallon per minutes = 0.0000138779 imperial gallon per millisecond). See the formula, worked examples, conversion table, and common uses.
Gallon per Minutes 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 6.30901964e-5 / 4.54609.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Gallon per Minutes to Imperial gallons per Millisecond
Gallon per Minutes 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. Gallon per Minutes is most often used for us residential and commercial plumbing fixture flow ratings.
Formula
imperial gallons per millisecond = gallon per minutes × 0.0000138779030771
This factor comes from each unit's defined relationship to the category's base unit: 1 gallon per minutes equals 0.0000630901964 base units, and 1 imperial gallon per millisecond equals 4.54609 base units, so dividing one by the other gives the direct gallon per minutes-to-imperial gallon per millisecond factor of 0.0000138779030771.
Simple example
1 gal/min × 0.00001387790308 = 0.0000138779 imp gal/ms
1 gallon per minutes = 0.0000138779 imperial gallons per millisecond.
Real-world example
60 gal/min × 0.00001387790308 = 0.0008326742 imp gal/ms
60 gallon per minutes = 0.0008326742 imperial gallons per millisecond.
Conversion table
| Gallon per Minutes (gal/min) | Imperial gallon per Millisecond (imp gal/ms) |
|---|---|
| 0.1 gal/min | 0.0000013878 imp gal/ms |
| 1 gal/min | 0.0000138779 imp gal/ms |
| 10 gal/min | 0.000138779 imp gal/ms |
| 60 gal/min | 0.0008326742 imp gal/ms |
| 100 gal/min | 0.0013877903 imp gal/ms |
| 1,000 gal/min | 0.0138779031 imp gal/ms |
Reverse conversion: Imperial gallon per Millisecond to Gallon per Minutes
0.0000138779 imp gal/ms × 72056.99553 = 0.9999997783 gal/min
0.0000138779 imperial gallons per millisecond = 0.9999997783 gallon per minutes.
gallon per minutes = imperial gallons per millisecond × 72056.9955303
For a page dedicated to this direction, see Imperial gallon per Millisecond to Gallon per Minutes.
Understanding the Gallon per Minutes
Gallon per Minutes (gal/min) measures volumetric flow rate. The standard US unit for pump, plumbing, and irrigation flow-rate specifications. It is classified as a US customary flow-rate unit.
Where it's used: United States (plumbing, pump, and irrigation industry standard)
Uses of the Gallon per Minutes today
- US residential and commercial plumbing fixture flow ratings
- US pump and irrigation system specifications
- US pool and spa filtration system sizing
Understanding the Imperial gallon per Millisecond (imp gal/ms)
Volumetric flow rate.
Gallon per Minutes — sources
- NIST Handbook 44 — General tables of units including US customary flow-rate measures.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many imperial gallons per millisecond are in 1 gallon per minutes?
1 gallon per minutes equals 0.0000138779 imperial gallons per millisecond, using the exact defined conversion factor rather than an estimate.
How do I convert gallon per minutes to imperial gallon per millisecond?
Multiply the gallon per minutes value by 0.00001387790308. The converter above does this instantly to whatever precision you set.
How do I convert imperial gallon per millisecond back to gallon per minutes?
Use the reverse factor: 1 imperial gallon per millisecond equals 72,056.99553 gallon per minutes. You can also use the swap control in the converter above to flip the direction instantly.
What is a gallon per minutes?
Gallon per Minutes (gal/min) measures volumetric flow rate. The standard US unit for pump, plumbing, and irrigation flow-rate specifications. It is classified as a US customary flow-rate unit.
What is a imperial gallon per millisecond?
Imperial gallon per Millisecond (imp gal/ms) is a unit of flow rate.
Is the gallon per minutes to imperial gallon per millisecond conversion exact?
Yes. Both gallon per minutes and imperial gallon per millisecond are defined by fixed standards rather than physical artifacts, so the factor of 0.00001387790308 used above is exact to as many digits as you choose to display.
Where is the gallon per minutes still used today?
United States (plumbing, pump, and irrigation industry standard)
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.