Volumetric flow rate.
Gallon per Seconds to Cubic Millimeter per Seconds Converter — gal/s to mm3/s
Convert Gallon per Seconds (gal/s) to Cubic Millimeter per Seconds (mm3/s) using the exact conversion factor (1 gallon per seconds = 3,785,411.784 cubic millimeter per seconds). See the formula, worked examples, and conversion table.
Gallon per Seconds 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 0.003785411784 / 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 Seconds to Cubic Millimeter per Seconds
Gallon per Seconds 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 seconds × 3785411.784
This factor comes from each unit's defined relationship to the category's base unit: 1 gallon per seconds equals 0.003785411784 base units, and 1 cubic millimeter per seconds equals 1e-9 base units, so dividing one by the other gives the direct gallon per seconds-to-cubic millimeter per seconds factor of 3785411.784.
Simple example
1 gal/s × 3785411.784 = 3,785,411.784 mm3/s
1 gallon per seconds = 3,785,411.784 cubic millimeter per seconds.
Real-world example
60 gal/s × 3785411.784 = 227,124,707 mm3/s
60 gallon per seconds = 227,124,707 cubic millimeter per seconds.
Conversion table
| Gallon per Seconds (gal/s) | Cubic Millimeter per Seconds (mm3/s) |
|---|---|
| 0.1 gal/s | 378,541.1784 mm3/s |
| 1 gal/s | 3,785,411.784 mm3/s |
| 10 gal/s | 37,854,117.84 mm3/s |
| 60 gal/s | 227,124,707 mm3/s |
| 100 gal/s | 378,541,178.4 mm3/s |
| 1,000 gal/s | 3,785,411,784 mm3/s |
Reverse conversion: Cubic Millimeter per Seconds to Gallon per Seconds
1 mm3/s × 2.641721e-7 = 2.641721e-7 gal/s
1 cubic millimeter per seconds = 2.641721e-7 gallon per seconds.
gallon per seconds = cubic millimeter per seconds × 2.641721e-7
For a page dedicated to this direction, see Cubic Millimeter per Seconds to Gallon per Seconds.
Understanding the Gallon per Seconds (gal/s)
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 seconds?
1 gallon per seconds equals 3,785,411.784 cubic millimeter per seconds, using the exact defined conversion factor rather than an estimate.
How do I convert gallon per seconds to cubic millimeter per seconds?
Multiply the gallon per seconds value by 3785411.784. The converter above does this instantly to whatever precision you set.
How do I convert cubic millimeter per seconds back to gallon per seconds?
Use the reverse factor: 1 cubic millimeter per seconds equals 2.641721e-7 gallon per seconds. You can also use the swap control in the converter above to flip the direction instantly.
What is a gallon per seconds?
Gallon per Seconds (gal/s) 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 seconds to cubic millimeter per seconds conversion exact?
Yes. Both gallon per seconds and cubic millimeter per seconds are defined by fixed standards rather than physical artifacts, so the factor of 3785411.784 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.