Volumetric flow rate.
Cubic inches per Millisecond to Gallon per Minutes Converter — in3/ms to gal/min
Convert Cubic inch per Millisecond (in3/ms) to Gallon per Minutes (gal/min) using the exact conversion factor (1 cubic inch per millisecond = 259.7402597 gallon per minutes). See the formula, worked examples, conversion table, and common uses.
Cubic inches per Millisecond to Gallon per Minutes 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 0.016387064 / 6.30901964e-5.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Cubic inches per Millisecond to Gallon per Minutes
Cubic inch per Millisecond and Gallon per Minutes 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
gallon per minutes = cubic inches per millisecond × 259.74025974
This factor comes from each unit's defined relationship to the category's base unit: 1 cubic inch per millisecond equals 0.016387064 base units, and 1 gallon per minutes equals 0.0000630901964 base units, so dividing one by the other gives the direct cubic inch per millisecond-to-gallon per minutes factor of 259.74025974.
Simple example
1 in3/ms × 259.7402597 = 259.7402597 gal/min
1 cubic inch per millisecond = 259.7402597 gallon per minutes.
Real-world example
60 in3/ms × 259.7402597 = 15,584.41558 gal/min
60 cubic inches per millisecond = 15,584.41558 gallon per minutes.
Conversion table
| Cubic inch per Millisecond (in3/ms) | Gallon per Minutes (gal/min) |
|---|---|
| 0.1 in3/ms | 25.97402597 gal/min |
| 1 in3/ms | 259.7402597 gal/min |
| 10 in3/ms | 2,597.402597 gal/min |
| 60 in3/ms | 15,584.41558 gal/min |
| 100 in3/ms | 25,974.02597 gal/min |
| 1,000 in3/ms | 259,740.2597 gal/min |
Reverse conversion: Gallon per Minutes to Cubic inch per Millisecond
259.7402597 gal/min × 0.00385 = 0.9999999998 in3/ms
259.7402597 gallon per minutes = 0.9999999998 cubic inches per millisecond.
cubic inches per millisecond = gallon per minutes × 0.00385
For a page dedicated to this direction, see Gallon per Minutes to Cubic inch per Millisecond.
Understanding the Cubic inch per Millisecond (in3/ms)
Volumetric flow rate.
Understanding the Gallon per Minutes
Gallon per Minutes (gal/min) measures volumetric flow rate. The standard US unit for pump, plumbing, and irrigation flow-rate specifications. It is classified as a US customary flow-rate unit.
Where it's used: United States (plumbing, pump, and irrigation industry standard)
Uses of the Gallon per Minutes today
- US residential and commercial plumbing fixture flow ratings
- US pump and irrigation system specifications
- US pool and spa filtration system sizing
Gallon per Minutes — sources
- NIST Handbook 44 — General tables of units including US customary flow-rate measures.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many gallon per minutes are in 1 cubic inch per millisecond?
1 cubic inch per millisecond equals 259.7402597 gallon per minutes, using the exact defined conversion factor rather than an estimate.
How do I convert cubic inch per millisecond to gallon per minutes?
Multiply the cubic inch per millisecond value by 259.7402597. The converter above does this instantly to whatever precision you set.
How do I convert gallon per minutes back to cubic inch per millisecond?
Use the reverse factor: 1 gallon per minutes equals 0.00385 cubic inches per millisecond. You can also use the swap control in the converter above to flip the direction instantly.
What is a cubic inch per millisecond?
Cubic inch per Millisecond (in3/ms) is a unit of flow rate.
What is a gallon per minutes?
Gallon per Minutes (gal/min) measures volumetric flow rate. The standard US unit for pump, plumbing, and irrigation flow-rate specifications. It is classified as a US customary flow-rate unit.
Is the cubic inch per millisecond to gallon per minutes conversion exact?
Yes. Both cubic inch per millisecond and gallon per minutes are defined by fixed standards rather than physical artifacts, so the factor of 259.7402597 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.