Volumetric flow rate.
Gallon per Days to Cubic inch per Days Converter — gal/d to in3/d
Convert Gallon per Days (gal/d) to Cubic inch per Days (in3/d) using the exact conversion factor (1 gallon per days = 231 cubic inch per days). See the formula, worked examples, and conversion table.
Gallon per Days to Cubic inch per Days 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 4.38126364e-8 / 1.89665093e-10.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Gallon per Days to Cubic inch per Days
Gallon per Days and Cubic inch per Days 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 days = gallon per days × 231
This factor comes from each unit's defined relationship to the category's base unit: 1 gallon per days equals 4.381264e-8 base units, and 1 cubic inch per days equals 1.896651e-10 base units, so dividing one by the other gives the direct gallon per days-to-cubic inch per days factor of 231.
Simple example
1 gal/d × 231 = 231 in3/d
1 gallon per days = 231 cubic inch per days.
Real-world example
60 gal/d × 231 = 13,860 in3/d
60 gallon per days = 13,860 cubic inch per days.
Conversion table
| Gallon per Days (gal/d) | Cubic inch per Days (in3/d) |
|---|---|
| 0.1 gal/d | 23.1 in3/d |
| 1 gal/d | 231 in3/d |
| 10 gal/d | 2,310 in3/d |
| 60 gal/d | 13,860 in3/d |
| 100 gal/d | 23,100 in3/d |
| 1,000 gal/d | 231,000 in3/d |
Reverse conversion: Cubic inch per Days to Gallon per Days
231 in3/d × 0.004329004329 = 1 gal/d
231 cubic inch per days = 1 gallon per days.
gallon per days = cubic inch per days × 0.004329004329
For a page dedicated to this direction, see Cubic inch per Days to Gallon per Days.
Understanding the Gallon per Days (gal/d)
Volumetric flow rate.
Understanding the Cubic inch per Days (in3/d)
Volumetric flow rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many cubic inch per days are in 1 gallon per days?
1 gallon per days equals 231 cubic inch per days, using the exact defined conversion factor rather than an estimate.
How do I convert gallon per days to cubic inch per days?
Multiply the gallon per days value by 231. The converter above does this instantly to whatever precision you set.
How do I convert cubic inch per days back to gallon per days?
Use the reverse factor: 1 cubic inch per days equals 0.0043290043 gallon per days. You can also use the swap control in the converter above to flip the direction instantly.
What is a gallon per days?
Gallon per Days (gal/d) is a unit of flow rate.
What is a cubic inch per days?
Cubic inch per Days (in3/d) is a unit of flow rate.
Is the gallon per days to cubic inch per days conversion exact?
Yes. Both gallon per days and cubic inch per days 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.