Volumetric flow rate.
Cubic Meter per Seconds to Gallons per Millisecond Converter — m3/s to gal/ms
Convert Cubic Meter per Seconds (m3/s) to Gallon per Millisecond (gal/ms) using the exact conversion factor (1 cubic meter per seconds = 0.2641720524 gallon per millisecond). See the formula, worked examples, conversion table, and common uses.
Cubic Meter 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 1 / 3.785411784.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Cubic Meter per Seconds to Gallons per Millisecond
Cubic Meter 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. Cubic Meter per Seconds is most often used for used by hydrologists and water-resource engineers internationally to report river and reservoir discharge at large scales.
Formula
gallons per millisecond = cubic meter per seconds × 0.264172052358
This factor comes from each unit's defined relationship to the category's base unit: 1 cubic meter per seconds equals 1 base unit, and 1 gallon per millisecond equals 3.785411784 base units, so dividing one by the other gives the direct cubic meter per seconds-to-gallon per millisecond factor of 0.264172052358.
Simple example
1 m3/s × 0.2641720524 = 0.2641720524 gal/ms
1 cubic meter per seconds = 0.2641720524 gallons per millisecond.
Real-world example
60 m3/s × 0.2641720524 = 15.85032314 gal/ms
60 cubic meter per seconds = 15.85032314 gallons per millisecond.
Conversion table
| Cubic Meter per Seconds (m3/s) | Gallon per Millisecond (gal/ms) |
|---|---|
| 0.1 m3/s | 0.0264172052 gal/ms |
| 1 m3/s | 0.2641720524 gal/ms |
| 10 m3/s | 2.641720524 gal/ms |
| 60 m3/s | 15.85032314 gal/ms |
| 100 m3/s | 26.41720524 gal/ms |
| 1,000 m3/s | 264.1720524 gal/ms |
Reverse conversion: Gallon per Millisecond to Cubic Meter per Seconds
0.2641720524 gal/ms × 3.785411784 = 1 m3/s
0.2641720524 gallons per millisecond = 1 cubic meter per seconds.
cubic meter per seconds = gallons per millisecond × 3.785411784
For a page dedicated to this direction, see Gallon per Millisecond to Cubic Meter per Seconds.
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
Understanding the Gallon per Millisecond (gal/ms)
Volumetric flow rate.
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 gallons per millisecond are in 1 cubic meter per seconds?
1 cubic meter per seconds equals 0.2641720524 gallons per millisecond, using the exact defined conversion factor rather than an estimate.
How do I convert cubic meter per seconds to gallon per millisecond?
Multiply the cubic meter per seconds value by 0.2641720524. The converter above does this instantly to whatever precision you set.
How do I convert gallon per millisecond back to cubic meter per seconds?
Use the reverse factor: 1 gallon per millisecond equals 3.785411784 cubic meter per seconds. You can also use the swap control in the converter above to flip the direction instantly.
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.
What is a gallon per millisecond?
Gallon per Millisecond (gal/ms) is a unit of flow rate.
Is the cubic meter per seconds to gallon per millisecond conversion exact?
Yes. Both cubic meter per seconds and gallon per millisecond are defined by fixed standards rather than physical artifacts, so the factor of 0.2641720524 used above is exact to as many digits as you choose to display.
Where is the cubic meter per seconds still used today?
Used internationally in hydrology and large-scale water-resource engineering
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.