Volumetric flow rate.
Cubic Meter per Hours to Gallons per Millisecond Converter — m3/h to gal/ms
Convert Cubic Meter per Hours (m3/h) to Gallon per Millisecond (gal/ms) using the exact conversion factor (1 cubic meter per hours = 0.0000733811 gallon per millisecond). See the formula, worked examples, conversion table, and common uses.
Cubic Meter per Hours 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 0.0002777777778 / 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 Hours to Gallons per Millisecond
Cubic Meter per Hours 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 Hours is most often used for hvac equipment airflow and liquid-flow ratings.
Formula
gallons per millisecond = cubic meter per hours × 0.000073381125655
This factor comes from each unit's defined relationship to the category's base unit: 1 cubic meter per hours equals 0.000277777777778 base units, and 1 gallon per millisecond equals 3.785411784 base units, so dividing one by the other gives the direct cubic meter per hours-to-gallon per millisecond factor of 0.000073381125655.
Simple example
1 m3/h × 0.00007338112566 = 0.0000733811 gal/ms
1 cubic meter per hours = 0.0000733811 gallons per millisecond.
Real-world example
60 m3/h × 0.00007338112566 = 0.0044028675 gal/ms
60 cubic meter per hours = 0.0044028675 gallons per millisecond.
Conversion table
| Cubic Meter per Hours (m3/h) | Gallon per Millisecond (gal/ms) |
|---|---|
| 0.1 m3/h | 0.0000073381 gal/ms |
| 1 m3/h | 0.0000733811 gal/ms |
| 10 m3/h | 0.0007338113 gal/ms |
| 60 m3/h | 0.0044028675 gal/ms |
| 100 m3/h | 0.0073381126 gal/ms |
| 1,000 m3/h | 0.0733811257 gal/ms |
Reverse conversion: Gallon per Millisecond to Cubic Meter per Hours
0.0000733811 gal/ms × 13627.48242 = 0.9999996504 m3/h
0.0000733811 gallons per millisecond = 0.9999996504 cubic meter per hours.
cubic meter per hours = gallons per millisecond × 13627.4824224
For a page dedicated to this direction, see Gallon per Millisecond to Cubic Meter per Hours.
Understanding the Cubic Meter per Hours
Cubic Meter per Hours (m3/h) measures volumetric flow rate. One cubic meter of volume passing a point every hour — a common scale for equipment and system flow ratings. It is classified as a metric derived flow-rate unit.
Where it's used: Standard flow-rate unit for HVAC and industrial equipment ratings internationally, outside the US
Uses of the Cubic Meter per Hours today
- HVAC equipment airflow and liquid-flow ratings
- Industrial pump and system flow specifications
- Building ventilation system design
Understanding the Gallon per Millisecond (gal/ms)
Volumetric flow rate.
Cubic Meter per Hours — sources
- ISO 5167 (flow measurement standards) — Cubic meters per hour as a standard industrial flow-rate unit.
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 hours?
1 cubic meter per hours equals 0.0000733811 gallons per millisecond, using the exact defined conversion factor rather than an estimate.
How do I convert cubic meter per hours to gallon per millisecond?
Multiply the cubic meter per hours value by 0.00007338112566. The converter above does this instantly to whatever precision you set.
How do I convert gallon per millisecond back to cubic meter per hours?
Use the reverse factor: 1 gallon per millisecond equals 13,627.48242 cubic meter per hours. You can also use the swap control in the converter above to flip the direction instantly.
What is a cubic meter per hours?
Cubic Meter per Hours (m3/h) measures volumetric flow rate. One cubic meter of volume passing a point every hour — a common scale for equipment and system flow ratings. It is classified as a metric derived flow-rate unit.
What is a gallon per millisecond?
Gallon per Millisecond (gal/ms) is a unit of flow rate.
Is the cubic meter per hours to gallon per millisecond conversion exact?
Yes. Both cubic meter per hours and gallon per millisecond are defined by fixed standards rather than physical artifacts, so the factor of 0.00007338112566 used above is exact to as many digits as you choose to display.
Where is the cubic meter per hours still used today?
Standard flow-rate unit for HVAC and industrial equipment ratings internationally, outside the US
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.