Volumetric flow rate.
Hectoliter per Seconds to Imperial gallons per Millisecond Converter — hL/s to imp gal/ms
Convert Hectoliter per Seconds (hL/s) to Imperial gallon per Millisecond (imp gal/ms) using the exact conversion factor (1 hectoliter per seconds = 0.0219969248 imperial gallon per millisecond). See the formula, worked examples, and conversion table.
Hectoliter 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 0.1 / 4.54609.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Hectoliter per Seconds to Imperial gallons per Millisecond
Hectoliter 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 = hectoliter per seconds × 0.0219969248299
This factor comes from each unit's defined relationship to the category's base unit: 1 hectoliter per seconds equals 0.1 base units, and 1 imperial gallon per millisecond equals 4.54609 base units, so dividing one by the other gives the direct hectoliter per seconds-to-imperial gallon per millisecond factor of 0.0219969248299.
Simple example
1 hL/s × 0.02199692483 = 0.0219969248 imp gal/ms
1 hectoliter per seconds = 0.0219969248 imperial gallons per millisecond.
Real-world example
60 hL/s × 0.02199692483 = 1.31981549 imp gal/ms
60 hectoliter per seconds = 1.31981549 imperial gallons per millisecond.
Conversion table
| Hectoliter per Seconds (hL/s) | Imperial gallon per Millisecond (imp gal/ms) |
|---|---|
| 0.1 hL/s | 0.0021996925 imp gal/ms |
| 1 hL/s | 0.0219969248 imp gal/ms |
| 10 hL/s | 0.2199692483 imp gal/ms |
| 60 hL/s | 1.31981549 imp gal/ms |
| 100 hL/s | 2.199692483 imp gal/ms |
| 1,000 hL/s | 21.99692483 imp gal/ms |
Reverse conversion: Imperial gallon per Millisecond to Hectoliter per Seconds
0.0219969248 imp gal/ms × 45.4609 = 0.9999999986 hL/s
0.0219969248 imperial gallons per millisecond = 0.9999999986 hectoliter per seconds.
hectoliter per seconds = imperial gallons per millisecond × 45.4609
For a page dedicated to this direction, see Imperial gallon per Millisecond to Hectoliter per Seconds.
Understanding the Hectoliter per Seconds (hL/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 hectoliter per seconds?
1 hectoliter per seconds equals 0.0219969248 imperial gallons per millisecond, using the exact defined conversion factor rather than an estimate.
How do I convert hectoliter per seconds to imperial gallon per millisecond?
Multiply the hectoliter per seconds value by 0.02199692483. The converter above does this instantly to whatever precision you set.
How do I convert imperial gallon per millisecond back to hectoliter per seconds?
Use the reverse factor: 1 imperial gallon per millisecond equals 45.4609 hectoliter per seconds. You can also use the swap control in the converter above to flip the direction instantly.
What is a hectoliter per seconds?
Hectoliter per Seconds (hL/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 hectoliter per seconds to imperial gallon per millisecond conversion exact?
Yes. Both hectoliter per seconds and imperial gallon per millisecond are defined by fixed standards rather than physical artifacts, so the factor of 0.02199692483 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.