Volumetric flow rate.
Quarts per Millisecond to Imperial gallon per Seconds Converter — qt/ms to imp gal/s
Convert Quart per Millisecond (qt/ms) to Imperial gallon per Seconds (imp gal/s) using the exact conversion factor (1 quart per millisecond = 208.1685462 imperial gallon per seconds). See the formula, worked examples, and conversion table.
Quarts per Millisecond to Imperial gallon per Seconds 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 0.946352946 / 0.00454609.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Quarts per Millisecond to Imperial gallon per Seconds
Quart per Millisecond and Imperial gallon per Seconds 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 gallon per seconds = quarts per millisecond × 208.168546157
This factor comes from each unit's defined relationship to the category's base unit: 1 quart per millisecond equals 0.946352946 base units, and 1 imperial gallon per seconds equals 0.00454609 base units, so dividing one by the other gives the direct quart per millisecond-to-imperial gallon per seconds factor of 208.168546157.
Simple example
1 qt/ms × 208.1685462 = 208.1685462 imp gal/s
1 quart per millisecond = 208.1685462 imperial gallon per seconds.
Real-world example
60 qt/ms × 208.1685462 = 12,490.11277 imp gal/s
60 quarts per millisecond = 12,490.11277 imperial gallon per seconds.
Conversion table
| Quart per Millisecond (qt/ms) | Imperial gallon per Seconds (imp gal/s) |
|---|---|
| 0.1 qt/ms | 20.81685462 imp gal/s |
| 1 qt/ms | 208.1685462 imp gal/s |
| 10 qt/ms | 2,081.685462 imp gal/s |
| 60 qt/ms | 12,490.11277 imp gal/s |
| 100 qt/ms | 20,816.85462 imp gal/s |
| 1,000 qt/ms | 208,168.5462 imp gal/s |
Reverse conversion: Imperial gallon per Seconds to Quart per Millisecond
208.1685462 imp gal/s × 0.004803799702 = 1 qt/ms
208.1685462 imperial gallon per seconds = 1 quarts per millisecond.
quarts per millisecond = imperial gallon per seconds × 0.00480379970202
For a page dedicated to this direction, see Imperial gallon per Seconds to Quart per Millisecond.
Understanding the Quart per Millisecond (qt/ms)
Volumetric flow rate.
Understanding the Imperial gallon per Seconds (imp gal/s)
Volumetric flow rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many imperial gallon per seconds are in 1 quart per millisecond?
1 quart per millisecond equals 208.1685462 imperial gallon per seconds, using the exact defined conversion factor rather than an estimate.
How do I convert quart per millisecond to imperial gallon per seconds?
Multiply the quart per millisecond value by 208.1685462. The converter above does this instantly to whatever precision you set.
How do I convert imperial gallon per seconds back to quart per millisecond?
Use the reverse factor: 1 imperial gallon per seconds equals 0.0048037997 quarts per millisecond. You can also use the swap control in the converter above to flip the direction instantly.
What is a quart per millisecond?
Quart per Millisecond (qt/ms) is a unit of flow rate.
What is a imperial gallon per seconds?
Imperial gallon per Seconds (imp gal/s) is a unit of flow rate.
Is the quart per millisecond to imperial gallon per seconds conversion exact?
Yes. Both quart per millisecond and imperial gallon per seconds are defined by fixed standards rather than physical artifacts, so the factor of 208.1685462 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.