Volumetric flow rate.
Liter per Seconds to Imperial gallons per Millisecond Converter — L/s to imp gal/ms
Convert Liter per Seconds (L/s) to Imperial gallon per Millisecond (imp gal/ms) using the exact conversion factor (1 liter per seconds = 0.0002199692 imperial gallon per millisecond). See the formula, worked examples, conversion table, and common uses.
Liter 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 0.001 / 4.54609.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Liter per Seconds to Imperial gallons per Millisecond
Liter 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. Liter per Seconds is most often used for municipal water supply and treatment plant flow rates.
Formula
imperial gallons per millisecond = liter per seconds × 0.000219969248299
This factor comes from each unit's defined relationship to the category's base unit: 1 liter per seconds equals 0.001 base units, and 1 imperial gallon per millisecond equals 4.54609 base units, so dividing one by the other gives the direct liter per seconds-to-imperial gallon per millisecond factor of 0.000219969248299.
Simple example
1 L/s × 0.0002199692483 = 0.0002199692 imp gal/ms
1 liter per seconds = 0.0002199692 imperial gallons per millisecond.
Real-world example
60 L/s × 0.0002199692483 = 0.0131981549 imp gal/ms
60 liter per seconds = 0.0131981549 imperial gallons per millisecond.
Conversion table
| Liter per Seconds (L/s) | Imperial gallon per Millisecond (imp gal/ms) |
|---|---|
| 0.1 L/s | 0.0000219969 imp gal/ms |
| 1 L/s | 0.0002199692 imp gal/ms |
| 10 L/s | 0.0021996925 imp gal/ms |
| 60 L/s | 0.0131981549 imp gal/ms |
| 100 L/s | 0.0219969248 imp gal/ms |
| 1,000 L/s | 0.2199692483 imp gal/ms |
Reverse conversion: Imperial gallon per Millisecond to Liter per Seconds
0.0002199692 imp gal/ms × 4546.09 = 0.9999997804 L/s
0.0002199692 imperial gallons per millisecond = 0.9999997804 liter per seconds.
liter per seconds = imperial gallons per millisecond × 4546.09
For a page dedicated to this direction, see Imperial gallon per Millisecond to Liter per Seconds.
Understanding the Liter per Seconds
Liter per Seconds (L/s) measures volumetric flow rate. One liter of volume passing a point every second — used for larger flows than liter-per-minute conveniently describes. It is classified as a metric derived flow-rate unit.
Where it's used: Common in municipal water-utility and industrial flow specifications internationally
L/s vs. L/min. Both measure the same quantity at different time scales; 1 L/s equals 60 L/min. L/s is typically used for larger, continuous industrial or utility flows, while L/min suits smaller household-scale flows.
Uses of the Liter per Seconds today
- Municipal water supply and treatment plant flow rates
- Industrial process flow specifications
- Stream and river discharge measurement at moderate scales
Understanding the Imperial gallon per Millisecond (imp gal/ms)
Volumetric flow rate.
Liter per Seconds — sources
- BIPM SI Brochure — Litre and second as accepted units used together to express 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 liter per seconds?
1 liter per seconds equals 0.0002199692 imperial gallons per millisecond, using the exact defined conversion factor rather than an estimate.
How do I convert liter per seconds to imperial gallon per millisecond?
Multiply the liter per seconds value by 0.0002199692483. The converter above does this instantly to whatever precision you set.
How do I convert imperial gallon per millisecond back to liter per seconds?
Use the reverse factor: 1 imperial gallon per millisecond equals 4,546.09 liter per seconds. You can also use the swap control in the converter above to flip the direction instantly.
What is a liter per seconds?
Liter per Seconds (L/s) measures volumetric flow rate. One liter of volume passing a point every second — used for larger flows than liter-per-minute conveniently describes. It is classified as a metric derived flow-rate unit.
What is a imperial gallon per millisecond?
Imperial gallon per Millisecond (imp gal/ms) is a unit of flow rate.
Is the liter per seconds to imperial gallon per millisecond conversion exact?
Yes. Both liter per seconds and imperial gallon per millisecond are defined by fixed standards rather than physical artifacts, so the factor of 0.0002199692483 used above is exact to as many digits as you choose to display.
What is the difference between l/s vs. l/min?
Both measure the same quantity at different time scales; 1 L/s equals 60 L/min. L/s is typically used for larger, continuous industrial or utility flows, while L/min suits smaller household-scale flows.
Where is the liter per seconds still used today?
Common in municipal water-utility and industrial flow specifications internationally