Volumetric flow rate.
Imperial gallon per Seconds to Cubic Millimeter per Seconds Converter — imp gal/s to mm3/s
Convert Imperial gallon per Seconds (imp gal/s) to Cubic Millimeter per Seconds (mm3/s) using the exact conversion factor (1 imperial gallon per seconds = 4,546,090 cubic millimeter per seconds). See the formula, worked examples, and conversion table.
Imperial 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 0.00454609 / 1e-9.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Imperial gallon per Seconds to Cubic Millimeter per Seconds
Imperial 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 = imperial gallon per seconds × 4546090
This factor comes from each unit's defined relationship to the category's base unit: 1 imperial gallon per seconds equals 0.00454609 base units, and 1 cubic millimeter per seconds equals 1e-9 base units, so dividing one by the other gives the direct imperial gallon per seconds-to-cubic millimeter per seconds factor of 4546090.
Simple example
1 imp gal/s × 4546090 = 4,546,090 mm3/s
1 imperial gallon per seconds = 4,546,090 cubic millimeter per seconds.
Real-world example
60 imp gal/s × 4546090 = 272,765,400 mm3/s
60 imperial gallon per seconds = 272,765,400 cubic millimeter per seconds.
Conversion table
| Imperial gallon per Seconds (imp gal/s) | Cubic Millimeter per Seconds (mm3/s) |
|---|---|
| 0.1 imp gal/s | 454,609 mm3/s |
| 1 imp gal/s | 4,546,090 mm3/s |
| 10 imp gal/s | 45,460,900 mm3/s |
| 60 imp gal/s | 272,765,400 mm3/s |
| 100 imp gal/s | 454,609,000 mm3/s |
| 1,000 imp gal/s | 4,546,090,000 mm3/s |
Reverse conversion: Cubic Millimeter per Seconds to Imperial gallon per Seconds
1 mm3/s × 2.199692e-7 = 2.199692e-7 imp gal/s
1 cubic millimeter per seconds = 2.199692e-7 imperial gallon per seconds.
imperial gallon per seconds = cubic millimeter per seconds × 2.199692e-7
For a page dedicated to this direction, see Cubic Millimeter per Seconds to Imperial gallon per Seconds.
Understanding the Imperial gallon per Seconds (imp 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 imperial gallon per seconds?
1 imperial gallon per seconds equals 4,546,090 cubic millimeter per seconds, using the exact defined conversion factor rather than an estimate.
How do I convert imperial gallon per seconds to cubic millimeter per seconds?
Multiply the imperial gallon per seconds value by 4546090. The converter above does this instantly to whatever precision you set.
How do I convert cubic millimeter per seconds back to imperial gallon per seconds?
Use the reverse factor: 1 cubic millimeter per seconds equals 2.199692e-7 imperial gallon per seconds. You can also use the swap control in the converter above to flip the direction instantly.
What is a imperial gallon per seconds?
Imperial gallon per Seconds (imp 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 imperial gallon per seconds to cubic millimeter per seconds conversion exact?
Yes. Both imperial gallon per seconds and cubic millimeter per seconds are defined by fixed standards rather than physical artifacts, so the factor of 4546090 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.