Volumetric flow rate.
Gallon per Seconds to Cubic inch per Seconds Converter — gal/s to in3/s
Convert Gallon per Seconds (gal/s) to Cubic inch per Seconds (in3/s) using the exact conversion factor (1 gallon per seconds = 231 cubic inch per seconds). See the formula, worked examples, and conversion table.
Gallon per Seconds to Cubic inch 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 / 1.6387064e-5.
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 inch per Seconds
Gallon per Seconds and Cubic inch 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 inch per seconds = gallon per seconds × 231
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 inch per seconds equals 0.000016387064 base units, so dividing one by the other gives the direct gallon per seconds-to-cubic inch per seconds factor of 231.
Simple example
1 gal/s × 231 = 231 in3/s
1 gallon per seconds = 231 cubic inch per seconds.
Real-world example
60 gal/s × 231 = 13,860 in3/s
60 gallon per seconds = 13,860 cubic inch per seconds.
Conversion table
| Gallon per Seconds (gal/s) | Cubic inch per Seconds (in3/s) |
|---|---|
| 0.1 gal/s | 23.1 in3/s |
| 1 gal/s | 231 in3/s |
| 10 gal/s | 2,310 in3/s |
| 60 gal/s | 13,860 in3/s |
| 100 gal/s | 23,100 in3/s |
| 1,000 gal/s | 231,000 in3/s |
Reverse conversion: Cubic inch per Seconds to Gallon per Seconds
231 in3/s × 0.004329004329 = 1 gal/s
231 cubic inch per seconds = 1 gallon per seconds.
gallon per seconds = cubic inch per seconds × 0.004329004329
For a page dedicated to this direction, see Cubic inch per Seconds to Gallon per Seconds.
Understanding the Gallon per Seconds (gal/s)
Volumetric flow rate.
Understanding the Cubic inch per Seconds (in3/s)
Volumetric flow rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many cubic inch per seconds are in 1 gallon per seconds?
1 gallon per seconds equals 231 cubic inch per seconds, using the exact defined conversion factor rather than an estimate.
How do I convert gallon per seconds to cubic inch per seconds?
Multiply the gallon per seconds value by 231. The converter above does this instantly to whatever precision you set.
How do I convert cubic inch per seconds back to gallon per seconds?
Use the reverse factor: 1 cubic inch per seconds equals 0.0043290043 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 inch per seconds?
Cubic inch per Seconds (in3/s) is a unit of flow rate.
Is the gallon per seconds to cubic inch per seconds conversion exact?
Yes. Both gallon per seconds and cubic inch per seconds 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.
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.