Volumetric flow rate.
Gallon per Hours to Cubic Millimeter per Seconds Converter — gal/h to mm3/s
Convert Gallon per Hours (gal/h) to Cubic Millimeter per Seconds (mm3/s) using the exact conversion factor (1 gallon per hours = 1,051.503273 cubic millimeter per seconds). See the formula, worked examples, and conversion table.
Gallon per Hours to Cubic Millimeter 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 1.05150327e-6 / 1e-9.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Gallon per Hours to Cubic Millimeter per Seconds
Gallon per Hours and Cubic Millimeter 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 millimeter per seconds = gallon per hours × 1051.50327333
This factor comes from each unit's defined relationship to the category's base unit: 1 gallon per hours equals 0.00000105150327333 base units, and 1 cubic millimeter per seconds equals 1e-9 base units, so dividing one by the other gives the direct gallon per hours-to-cubic millimeter per seconds factor of 1051.50327333.
Simple example
1 gal/h × 1051.503273 = 1,051.503273 mm3/s
1 gallon per hours = 1,051.503273 cubic millimeter per seconds.
Real-world example
60 gal/h × 1051.503273 = 63,090.1964 mm3/s
60 gallon per hours = 63,090.1964 cubic millimeter per seconds.
Conversion table
| Gallon per Hours (gal/h) | Cubic Millimeter per Seconds (mm3/s) |
|---|---|
| 0.1 gal/h | 105.1503273 mm3/s |
| 1 gal/h | 1,051.503273 mm3/s |
| 10 gal/h | 10,515.03273 mm3/s |
| 60 gal/h | 63,090.1964 mm3/s |
| 100 gal/h | 105,150.3273 mm3/s |
| 1,000 gal/h | 1,051,503.273 mm3/s |
Reverse conversion: Cubic Millimeter per Seconds to Gallon per Hours
1 mm3/s × 0.0009510193885 = 0.0009510194 gal/h
1 cubic millimeter per seconds = 0.0009510194 gallon per hours.
gallon per hours = cubic millimeter per seconds × 0.000951019388489
For a page dedicated to this direction, see Cubic Millimeter per Seconds to Gallon per Hours.
Understanding the Gallon per Hours (gal/h)
Volumetric flow rate.
Understanding the Cubic Millimeter per Seconds (mm3/s)
Volumetric flow rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many cubic millimeter per seconds are in 1 gallon per hours?
1 gallon per hours equals 1,051.503273 cubic millimeter per seconds, using the exact defined conversion factor rather than an estimate.
How do I convert gallon per hours to cubic millimeter per seconds?
Multiply the gallon per hours value by 1051.503273. The converter above does this instantly to whatever precision you set.
How do I convert cubic millimeter per seconds back to gallon per hours?
Use the reverse factor: 1 cubic millimeter per seconds equals 0.0009510194 gallon per hours. You can also use the swap control in the converter above to flip the direction instantly.
What is a gallon per hours?
Gallon per Hours (gal/h) is a unit of flow rate.
What is a cubic millimeter per seconds?
Cubic Millimeter per Seconds (mm3/s) is a unit of flow rate.
Is the gallon per hours to cubic millimeter per seconds conversion exact?
Yes. Both gallon per hours and cubic millimeter per seconds are defined by fixed standards rather than physical artifacts, so the factor of 1051.503273 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.