Volumetric flow rate.
Gallon per Minutes to Cubic inch per Minutes Converter — gal/min to in3/min
Convert Gallon per Minutes (gal/min) to Cubic inch per Minutes (in3/min) using the exact conversion factor (1 gallon per minutes = 231 cubic inch per minutes). See the formula, worked examples, conversion table, and common uses.
Gallon per Minutes to Cubic inch 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 6.30901964e-5 / 2.73117733e-7.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Gallon per Minutes to Cubic inch per Minutes
Gallon per Minutes and Cubic inch 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. Gallon per Minutes is most often used for us residential and commercial plumbing fixture flow ratings.
Formula
cubic inch per minutes = gallon per minutes × 231
This factor comes from each unit's defined relationship to the category's base unit: 1 gallon per minutes equals 0.0000630901964 base units, and 1 cubic inch per minutes equals 2.731177e-7 base units, so dividing one by the other gives the direct gallon per minutes-to-cubic inch per minutes factor of 231.
Simple example
1 gal/min × 231 = 231 in3/min
1 gallon per minutes = 231 cubic inch per minutes.
Real-world example
60 gal/min × 231 = 13,860 in3/min
60 gallon per minutes = 13,860 cubic inch per minutes.
Conversion table
| Gallon per Minutes (gal/min) | Cubic inch per Minutes (in3/min) |
|---|---|
| 0.1 gal/min | 23.1 in3/min |
| 1 gal/min | 231 in3/min |
| 10 gal/min | 2,310 in3/min |
| 60 gal/min | 13,860 in3/min |
| 100 gal/min | 23,100 in3/min |
| 1,000 gal/min | 231,000 in3/min |
Reverse conversion: Cubic inch per Minutes to Gallon per Minutes
231 in3/min × 0.004329004329 = 1 gal/min
231 cubic inch per minutes = 1 gallon per minutes.
gallon per minutes = cubic inch per minutes × 0.004329004329
For a page dedicated to this direction, see Cubic inch per Minutes to Gallon per Minutes.
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
Understanding the Cubic inch per Minutes (in3/min)
Volumetric flow rate.
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 cubic inch per minutes are in 1 gallon per minutes?
1 gallon per minutes equals 231 cubic inch per minutes, using the exact defined conversion factor rather than an estimate.
How do I convert gallon per minutes to cubic inch per minutes?
Multiply the gallon per minutes value by 231. The converter above does this instantly to whatever precision you set.
How do I convert cubic inch per minutes back to gallon per minutes?
Use the reverse factor: 1 cubic inch per minutes equals 0.0043290043 gallon per minutes. You can also use the swap control in the converter above to flip the direction instantly.
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.
What is a cubic inch per minutes?
Cubic inch per Minutes (in3/min) is a unit of flow rate.
Is the gallon per minutes to cubic inch per minutes conversion exact?
Yes. Both gallon per minutes and cubic inch per minutes are defined by fixed standards rather than physical artifacts, so the factor of 231 used above is exact to as many digits as you choose to display.
Where is the gallon per minutes still used today?
United States (plumbing, pump, and irrigation industry standard)
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.