Volumetric flow rate.
Quart per Hours to Imperial gallons per Millisecond Converter — qt/h to imp gal/ms
Convert Quart per Hours (qt/h) to Imperial gallon per Millisecond (imp gal/ms) using the exact conversion factor (1 quart per hours = 5.78246e-8 imperial gallon per millisecond). See the formula, worked examples, and conversion table.
Quart per Hours to Imperial gallons 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 2.62875818e-7 / 4.54609.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Quart per Hours to Imperial gallons per Millisecond
Quart per Hours and Imperial gallon 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
imperial gallons per millisecond = quart per hours × 5.78246e-8
This factor comes from each unit's defined relationship to the category's base unit: 1 quart per hours equals 2.628758e-7 base units, and 1 imperial gallon per millisecond equals 4.54609 base units, so dividing one by the other gives the direct quart per hours-to-imperial gallon per millisecond factor of 5.78246e-8.
Simple example
1 qt/h × 5.78246e-8 = 5.78246e-8 imp gal/ms
1 quart per hours = 5.78246e-8 imperial gallons per millisecond.
Real-world example
60 qt/h × 5.78246e-8 = 0.0000034695 imp gal/ms
60 quart per hours = 0.0000034695 imperial gallons per millisecond.
Conversion table
| Quart per Hours (qt/h) | Imperial gallon per Millisecond (imp gal/ms) |
|---|---|
| 0.1 qt/h | 5.78246e-9 imp gal/ms |
| 1 qt/h | 5.78246e-8 imp gal/ms |
| 10 qt/h | 5.78246e-7 imp gal/ms |
| 60 qt/h | 0.0000034695 imp gal/ms |
| 100 qt/h | 0.0000057825 imp gal/ms |
| 1,000 qt/h | 0.0000578246 imp gal/ms |
Reverse conversion: Imperial gallon per Millisecond to Quart per Hours
5.78246e-8 imp gal/ms × 17293678.93 = 1.000000066 qt/h
5.78246e-8 imperial gallons per millisecond = 1.000000066 quart per hours.
quart per hours = imperial gallons per millisecond × 17293678.9273
For a page dedicated to this direction, see Imperial gallon per Millisecond to Quart per Hours.
Understanding the Quart per Hours (qt/h)
Volumetric flow rate.
Understanding the Imperial gallon per Millisecond (imp gal/ms)
Volumetric flow rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many imperial gallons per millisecond are in 1 quart per hours?
1 quart per hours equals 5.78246e-8 imperial gallons per millisecond, using the exact defined conversion factor rather than an estimate.
How do I convert quart per hours to imperial gallon per millisecond?
Multiply the quart per hours value by 5.78246e-8. The converter above does this instantly to whatever precision you set.
How do I convert imperial gallon per millisecond back to quart per hours?
Use the reverse factor: 1 imperial gallon per millisecond equals 17,293,678.93 quart per hours. You can also use the swap control in the converter above to flip the direction instantly.
What is a quart per hours?
Quart per Hours (qt/h) is a unit of flow rate.
What is a imperial gallon per millisecond?
Imperial gallon per Millisecond (imp gal/ms) is a unit of flow rate.
Is the quart per hours to imperial gallon per millisecond conversion exact?
Yes. Both quart per hours and imperial gallon per millisecond are defined by fixed standards rather than physical artifacts, so the factor of 5.78246e-8 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.