Volumetric flow rate.
Liter per Seconds to Gallons per Millisecond Converter — L/s to gal/ms
Convert Liter per Seconds (L/s) to Gallon per Millisecond (gal/ms) using the exact conversion factor (1 liter per seconds = 0.0002641721 gallon per millisecond). See the formula, worked examples, conversion table, and common uses.
Liter per Seconds to 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 / 3.785411784.
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 Gallons per Millisecond
Liter per Seconds and 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
gallons per millisecond = liter per seconds × 0.000264172052358
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 gallon per millisecond equals 3.785411784 base units, so dividing one by the other gives the direct liter per seconds-to-gallon per millisecond factor of 0.000264172052358.
Simple example
1 L/s × 0.0002641720524 = 0.0002641721 gal/ms
1 liter per seconds = 0.0002641721 gallons per millisecond.
Real-world example
60 L/s × 0.0002641720524 = 0.0158503231 gal/ms
60 liter per seconds = 0.0158503231 gallons per millisecond.
Conversion table
| Liter per Seconds (L/s) | Gallon per Millisecond (gal/ms) |
|---|---|
| 0.1 L/s | 0.0000264172 gal/ms |
| 1 L/s | 0.0002641721 gal/ms |
| 10 L/s | 0.0026417205 gal/ms |
| 60 L/s | 0.0158503231 gal/ms |
| 100 L/s | 0.0264172052 gal/ms |
| 1,000 L/s | 0.2641720524 gal/ms |
Reverse conversion: Gallon per Millisecond to Liter per Seconds
0.0002641721 gal/ms × 3785.411784 = 1.00000018 L/s
0.0002641721 gallons per millisecond = 1.00000018 liter per seconds.
liter per seconds = gallons per millisecond × 3785.411784
For a page dedicated to this direction, see 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 Gallon per Millisecond (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 gallons per millisecond are in 1 liter per seconds?
1 liter per seconds equals 0.0002641721 gallons per millisecond, using the exact defined conversion factor rather than an estimate.
How do I convert liter per seconds to gallon per millisecond?
Multiply the liter per seconds value by 0.0002641720524. The converter above does this instantly to whatever precision you set.
How do I convert gallon per millisecond back to liter per seconds?
Use the reverse factor: 1 gallon per millisecond equals 3,785.411784 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 gallon per millisecond?
Gallon per Millisecond (gal/ms) is a unit of flow rate.
Is the liter per seconds to gallon per millisecond conversion exact?
Yes. Both liter per seconds and gallon per millisecond are defined by fixed standards rather than physical artifacts, so the factor of 0.0002641720524 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