Volumetric flow rate.
Gallon per Days to Cubic feet per Millisecond Converter — gal/d to ft3/ms
Convert Gallon per Days (gal/d) to Cubic foot per Millisecond (ft3/ms) using the exact conversion factor (1 gallon per days = 1.547229e-9 cubic foot per millisecond). See the formula, worked examples, and conversion table.
Gallon per Days to Cubic feet per Millisecond 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 / 28.31684659.
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 feet per Millisecond
Gallon per Days and Cubic foot per Millisecond 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 feet per millisecond = gallon per days × 1.547229e-9
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 foot per millisecond equals 28.316846592 base units, so dividing one by the other gives the direct gallon per days-to-cubic foot per millisecond factor of 1.547229e-9.
Simple example
1 gal/d × 1.547229e-9 = 1.547229e-9 ft3/ms
1 gallon per days = 1.547229e-9 cubic feet per millisecond.
Real-world example
60 gal/d × 1.547229e-9 = 9.283372e-8 ft3/ms
60 gallon per days = 9.283372e-8 cubic feet per millisecond.
Conversion table
| Gallon per Days (gal/d) | Cubic foot per Millisecond (ft3/ms) |
|---|---|
| 0.1 gal/d | 1.547229e-10 ft3/ms |
| 1 gal/d | 1.547229e-9 ft3/ms |
| 10 gal/d | 1.547229e-8 ft3/ms |
| 60 gal/d | 9.283372e-8 ft3/ms |
| 100 gal/d | 1.547229e-7 ft3/ms |
| 1,000 gal/d | 0.0000015472 ft3/ms |
Reverse conversion: Cubic foot per Millisecond to Gallon per Days
1.547229e-9 ft3/ms × 646316883.1 = 1.000000225 gal/d
1.547229e-9 cubic feet per millisecond = 1.000000225 gallon per days.
gallon per days = cubic feet per millisecond × 646316883.117
For a page dedicated to this direction, see Cubic foot per Millisecond to Gallon per Days.
Understanding the Gallon per Days (gal/d)
Volumetric flow rate.
Understanding the Cubic foot per Millisecond (ft3/ms)
Volumetric flow rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many cubic feet per millisecond are in 1 gallon per days?
1 gallon per days equals 1.547229e-9 cubic feet per millisecond, using the exact defined conversion factor rather than an estimate.
How do I convert gallon per days to cubic foot per millisecond?
Multiply the gallon per days value by 1.547229e-9. The converter above does this instantly to whatever precision you set.
How do I convert cubic foot per millisecond back to gallon per days?
Use the reverse factor: 1 cubic foot per millisecond equals 646,316,883.1 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 foot per millisecond?
Cubic foot per Millisecond (ft3/ms) is a unit of flow rate.
Is the gallon per days to cubic foot per millisecond conversion exact?
Yes. Both gallon per days and cubic foot per millisecond are defined by fixed standards rather than physical artifacts, so the factor of 1.547229e-9 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.