Volumetric flow rate.
Imperial quart per Seconds to Imperial gallons per Millisecond Converter — imp qt/s to imp gal/ms
Convert Imperial quart per Seconds (imp qt/s) to Imperial gallon per Millisecond (imp gal/ms) using the exact conversion factor (1 imperial quart per seconds = 0.00025 imperial gallon per millisecond). See the formula, worked examples, and conversion table.
Imperial quart per Seconds 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 0.0011365225 / 4.54609.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Imperial quart per Seconds to Imperial gallons per Millisecond
Imperial quart per Seconds 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 = imperial quart per seconds × 0.00025
This factor comes from each unit's defined relationship to the category's base unit: 1 imperial quart per seconds equals 0.0011365225 base units, and 1 imperial gallon per millisecond equals 4.54609 base units, so dividing one by the other gives the direct imperial quart per seconds-to-imperial gallon per millisecond factor of 0.00025.
Simple example
1 imp qt/s × 0.00025 = 0.00025 imp gal/ms
1 imperial quart per seconds = 0.00025 imperial gallons per millisecond.
Real-world example
60 imp qt/s × 0.00025 = 0.015 imp gal/ms
60 imperial quart per seconds = 0.015 imperial gallons per millisecond.
Conversion table
| Imperial quart per Seconds (imp qt/s) | Imperial gallon per Millisecond (imp gal/ms) |
|---|---|
| 0.1 imp qt/s | 0.000025 imp gal/ms |
| 1 imp qt/s | 0.00025 imp gal/ms |
| 10 imp qt/s | 0.0025 imp gal/ms |
| 60 imp qt/s | 0.015 imp gal/ms |
| 100 imp qt/s | 0.025 imp gal/ms |
| 1,000 imp qt/s | 0.25 imp gal/ms |
Reverse conversion: Imperial gallon per Millisecond to Imperial quart per Seconds
0.00025 imp gal/ms × 4000 = 1 imp qt/s
0.00025 imperial gallons per millisecond = 1 imperial quart per seconds.
imperial quart per seconds = imperial gallons per millisecond × 4000
For a page dedicated to this direction, see Imperial gallon per Millisecond to Imperial quart per Seconds.
Understanding the Imperial quart per Seconds (imp qt/s)
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 imperial quart per seconds?
1 imperial quart per seconds equals 0.00025 imperial gallons per millisecond, using the exact defined conversion factor rather than an estimate.
How do I convert imperial quart per seconds to imperial gallon per millisecond?
Multiply the imperial quart per seconds value by 0.00025. The converter above does this instantly to whatever precision you set.
How do I convert imperial gallon per millisecond back to imperial quart per seconds?
Use the reverse factor: 1 imperial gallon per millisecond equals 4,000 imperial quart per seconds. You can also use the swap control in the converter above to flip the direction instantly.
What is a imperial quart per seconds?
Imperial quart per Seconds (imp qt/s) 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 imperial quart per seconds to imperial gallon per millisecond conversion exact?
Yes. Both imperial quart per seconds and imperial gallon per millisecond are defined by fixed standards rather than physical artifacts, so the factor of 0.00025 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.