Volumetric flow rate.
Gallons per Millisecond to Cubic Meter per Seconds Converter — gal/ms to m3/s
Convert Gallon per Millisecond (gal/ms) to Cubic Meter per Seconds (m3/s) using the exact conversion factor (1 gallon per millisecond = 3.785411784 cubic meter per seconds). See the formula, worked examples, conversion table, and common uses.
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 3.785411784 / 1.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Gallons per Millisecond to Cubic Meter per Seconds
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 = gallons per millisecond × 3.785411784
This factor comes from each unit's defined relationship to the category's base unit: 1 gallon per millisecond equals 3.785411784 base units, and 1 cubic meter per seconds equals 1 base unit, so dividing one by the other gives the direct gallon per millisecond-to-cubic meter per seconds factor of 3.785411784.
Simple example
1 gal/ms × 3.785411784 = 3.785411784 m3/s
1 gallon per millisecond = 3.785411784 cubic meter per seconds.
Real-world example
60 gal/ms × 3.785411784 = 227.124707 m3/s
60 gallons per millisecond = 227.124707 cubic meter per seconds.
Conversion table
| Gallon per Millisecond (gal/ms) | Cubic Meter per Seconds (m3/s) |
|---|---|
| 0.1 gal/ms | 0.3785411784 m3/s |
| 1 gal/ms | 3.785411784 m3/s |
| 10 gal/ms | 37.85411784 m3/s |
| 60 gal/ms | 227.124707 m3/s |
| 100 gal/ms | 378.5411784 m3/s |
| 1,000 gal/ms | 3,785.411784 m3/s |
Reverse conversion: Cubic Meter per Seconds to Gallon per Millisecond
3.785411784 m3/s × 0.2641720524 = 1 gal/ms
3.785411784 cubic meter per seconds = 1 gallon per millisecond.
gallons per millisecond = cubic meter per seconds × 0.264172052358
For a page dedicated to this direction, see Cubic Meter per Seconds to Gallon per Millisecond.
Understanding the Gallon per Millisecond (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 gallon per millisecond?
1 gallon per millisecond equals 3.785411784 cubic meter per seconds, using the exact defined conversion factor rather than an estimate.
How do I convert gallon per millisecond to cubic meter per seconds?
Multiply the gallon per millisecond value by 3.785411784. The converter above does this instantly to whatever precision you set.
How do I convert cubic meter per seconds back to gallon per millisecond?
Use the reverse factor: 1 cubic meter per seconds equals 0.2641720524 gallons per millisecond. You can also use the swap control in the converter above to flip the direction instantly.
What is a gallon per millisecond?
Gallon per Millisecond (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 gallon per millisecond to cubic meter per seconds conversion exact?
Yes. Both gallon per millisecond and cubic meter per seconds are defined by fixed standards rather than physical artifacts, so the factor of 3.785411784 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.