Volumetric flow rate.
Imperial gallons per Millisecond to Cubic Meter per Seconds Converter — imp gal/ms to m3/s
Convert Imperial gallon per Millisecond (imp gal/ms) to Cubic Meter per Seconds (m3/s) using the exact conversion factor (1 imperial gallon per millisecond = 4.54609 cubic meter per seconds). See the formula, worked examples, conversion table, and common uses.
Imperial gallons per Millisecond to Cubic Meter 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 4.54609 / 1.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Imperial gallons per Millisecond to Cubic Meter per Seconds
Imperial gallon per Millisecond and Cubic Meter 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 meter per seconds = imperial gallons per millisecond × 4.54609
This factor comes from each unit's defined relationship to the category's base unit: 1 imperial gallon per millisecond equals 4.54609 base units, and 1 cubic meter per seconds equals 1 base unit, so dividing one by the other gives the direct imperial gallon per millisecond-to-cubic meter per seconds factor of 4.54609.
Simple example
1 imp gal/ms × 4.54609 = 4.54609 m3/s
1 imperial gallon per millisecond = 4.54609 cubic meter per seconds.
Real-world example
60 imp gal/ms × 4.54609 = 272.7654 m3/s
60 imperial gallons per millisecond = 272.7654 cubic meter per seconds.
Conversion table
| Imperial gallon per Millisecond (imp gal/ms) | Cubic Meter per Seconds (m3/s) |
|---|---|
| 0.1 imp gal/ms | 0.454609 m3/s |
| 1 imp gal/ms | 4.54609 m3/s |
| 10 imp gal/ms | 45.4609 m3/s |
| 60 imp gal/ms | 272.7654 m3/s |
| 100 imp gal/ms | 454.609 m3/s |
| 1,000 imp gal/ms | 4,546.09 m3/s |
Reverse conversion: Cubic Meter per Seconds to Imperial gallon per Millisecond
4.54609 m3/s × 0.2199692483 = 1 imp gal/ms
4.54609 cubic meter per seconds = 1 imperial gallons per millisecond.
imperial gallons per millisecond = cubic meter per seconds × 0.219969248299
For a page dedicated to this direction, see Cubic Meter per Seconds to Imperial gallon per Millisecond.
Understanding the Imperial gallon per Millisecond (imp gal/ms)
Volumetric flow rate.
Understanding the Cubic Meter per Seconds
Cubic Meter per Seconds (m3/s) measures volumetric flow rate. The SI coherent unit for volumetric flow rate — one cubic meter of volume passing a point every second. It is classified as a SI coherent derived unit.
Where it's used: Used internationally in hydrology and large-scale water-resource engineering
Uses of the Cubic Meter per Seconds today
- Used by hydrologists and water-resource engineers internationally to report river and reservoir discharge at large scales
Cubic Meter per Seconds — sources
- BIPM SI Brochure — Cubic meter per second as the SI coherent derived unit for volumetric flow rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many cubic meter per seconds are in 1 imperial gallon per millisecond?
1 imperial gallon per millisecond equals 4.54609 cubic meter per seconds, using the exact defined conversion factor rather than an estimate.
How do I convert imperial gallon per millisecond to cubic meter per seconds?
Multiply the imperial gallon per millisecond value by 4.54609. The converter above does this instantly to whatever precision you set.
How do I convert cubic meter per seconds back to imperial gallon per millisecond?
Use the reverse factor: 1 cubic meter per seconds equals 0.2199692483 imperial gallons per millisecond. You can also use the swap control in the converter above to flip the direction instantly.
What is a imperial gallon per millisecond?
Imperial gallon per Millisecond (imp gal/ms) is a unit of flow rate.
What is a cubic meter per seconds?
Cubic Meter per Seconds (m3/s) measures volumetric flow rate. The SI coherent unit for volumetric flow rate — one cubic meter of volume passing a point every second. It is classified as a SI coherent derived unit.
Is the imperial gallon per millisecond to cubic meter per seconds conversion exact?
Yes. Both imperial gallon per millisecond and cubic meter per seconds are defined by fixed standards rather than physical artifacts, so the factor of 4.54609 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.