Volumetric flow rate.
Imperial gallon per Seconds to Liters per Millisecond Converter — imp gal/s to L/ms
Convert Imperial gallon per Seconds (imp gal/s) to Liter per Millisecond (L/ms) using the exact conversion factor (1 imperial gallon per seconds = 0.00454609 liter per millisecond). See the formula, worked examples, and conversion table.
Imperial gallon per Seconds to Liters 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 0.00454609 / 1.
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 Seconds to Liters per Millisecond
Imperial gallon per Seconds and Liter 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
liters per millisecond = imperial gallon per seconds × 0.00454609
This factor comes from each unit's defined relationship to the category's base unit: 1 imperial gallon per seconds equals 0.00454609 base units, and 1 liter per millisecond equals 1 base unit, so dividing one by the other gives the direct imperial gallon per seconds-to-liter per millisecond factor of 0.00454609.
Simple example
1 imp gal/s × 0.00454609 = 0.00454609 L/ms
1 imperial gallon per seconds = 0.00454609 liters per millisecond.
Real-world example
60 imp gal/s × 0.00454609 = 0.2727654 L/ms
60 imperial gallon per seconds = 0.2727654 liters per millisecond.
Conversion table
| Imperial gallon per Seconds (imp gal/s) | Liter per Millisecond (L/ms) |
|---|---|
| 0.1 imp gal/s | 0.000454609 L/ms |
| 1 imp gal/s | 0.00454609 L/ms |
| 10 imp gal/s | 0.0454609 L/ms |
| 60 imp gal/s | 0.2727654 L/ms |
| 100 imp gal/s | 0.454609 L/ms |
| 1,000 imp gal/s | 4.54609 L/ms |
Reverse conversion: Liter per Millisecond to Imperial gallon per Seconds
0.00454609 L/ms × 219.9692483 = 1 imp gal/s
0.00454609 liters per millisecond = 1 imperial gallon per seconds.
imperial gallon per seconds = liters per millisecond × 219.969248299
For a page dedicated to this direction, see Liter per Millisecond to Imperial gallon per Seconds.
Understanding the Imperial gallon per Seconds (imp gal/s)
Volumetric flow rate.
Understanding the Liter per Millisecond (L/ms)
Volumetric flow rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many liters per millisecond are in 1 imperial gallon per seconds?
1 imperial gallon per seconds equals 0.00454609 liters per millisecond, using the exact defined conversion factor rather than an estimate.
How do I convert imperial gallon per seconds to liter per millisecond?
Multiply the imperial gallon per seconds value by 0.00454609. The converter above does this instantly to whatever precision you set.
How do I convert liter per millisecond back to imperial gallon per seconds?
Use the reverse factor: 1 liter per millisecond equals 219.9692483 imperial gallon per seconds. You can also use the swap control in the converter above to flip the direction instantly.
What is a imperial gallon per seconds?
Imperial gallon per Seconds (imp gal/s) is a unit of flow rate.
What is a liter per millisecond?
Liter per Millisecond (L/ms) is a unit of flow rate.
Is the imperial gallon per seconds to liter per millisecond conversion exact?
Yes. Both imperial gallon per seconds and liter per millisecond are defined by fixed standards rather than physical artifacts, so the factor of 0.00454609 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.