Volumetric flow rate.
Imperial gallon per Days to Cubic feet per Millisecond Converter — imp gal/d to ft3/ms
Convert Imperial gallon per Days (imp gal/d) to Cubic foot per Millisecond (ft3/ms) using the exact conversion factor (1 imperial gallon per days = 1.858144e-9 cubic foot per millisecond). See the formula, worked examples, and conversion table.
Imperial 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 5.26167824e-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 Imperial gallon per Days to Cubic feet per Millisecond
Imperial 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 = imperial gallon per days × 1.858144e-9
This factor comes from each unit's defined relationship to the category's base unit: 1 imperial gallon per days equals 5.261678e-8 base units, and 1 cubic foot per millisecond equals 28.316846592 base units, so dividing one by the other gives the direct imperial gallon per days-to-cubic foot per millisecond factor of 1.858144e-9.
Simple example
1 imp gal/d × 1.858144e-9 = 1.858144e-9 ft3/ms
1 imperial gallon per days = 1.858144e-9 cubic feet per millisecond.
Real-world example
60 imp gal/d × 1.858144e-9 = 1.114886e-7 ft3/ms
60 imperial gallon per days = 1.114886e-7 cubic feet per millisecond.
Conversion table
| Imperial gallon per Days (imp gal/d) | Cubic foot per Millisecond (ft3/ms) |
|---|---|
| 0.1 imp gal/d | 1.858144e-10 ft3/ms |
| 1 imp gal/d | 1.858144e-9 ft3/ms |
| 10 imp gal/d | 1.858144e-8 ft3/ms |
| 60 imp gal/d | 1.114886e-7 ft3/ms |
| 100 imp gal/d | 1.858144e-7 ft3/ms |
| 1,000 imp gal/d | 0.0000018581 ft3/ms |
Reverse conversion: Cubic foot per Millisecond to Imperial gallon per Days
1.858144e-9 ft3/ms × 538171383.7 = 0.9999999275 imp gal/d
1.858144e-9 cubic feet per millisecond = 0.9999999275 imperial gallon per days.
imperial gallon per days = cubic feet per millisecond × 538171383.661
For a page dedicated to this direction, see Cubic foot per Millisecond to Imperial gallon per Days.
Understanding the Imperial gallon per Days (imp 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 imperial gallon per days?
1 imperial gallon per days equals 1.858144e-9 cubic feet per millisecond, using the exact defined conversion factor rather than an estimate.
How do I convert imperial gallon per days to cubic foot per millisecond?
Multiply the imperial gallon per days value by 1.858144e-9. The converter above does this instantly to whatever precision you set.
How do I convert cubic foot per millisecond back to imperial gallon per days?
Use the reverse factor: 1 cubic foot per millisecond equals 538,171,383.7 imperial gallon per days. You can also use the swap control in the converter above to flip the direction instantly.
What is a imperial gallon per days?
Imperial gallon per Days (imp 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 imperial gallon per days to cubic foot per millisecond conversion exact?
Yes. Both imperial gallon per days and cubic foot per millisecond are defined by fixed standards rather than physical artifacts, so the factor of 1.858144e-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.