Volumetric flow rate.
Gallon per Seconds to Liters per Millisecond Converter — gal/s to L/ms
Convert Gallon per Seconds (gal/s) to Liter per Millisecond (L/ms) using the exact conversion factor (1 gallon per seconds = 0.0037854118 liter per millisecond). See the formula, worked examples, and conversion table.
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 0.003785411784 / 1.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Gallon per Seconds to Liters per Millisecond
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 = gallon per seconds × 0.003785411784
This factor comes from each unit's defined relationship to the category's base unit: 1 gallon per seconds equals 0.003785411784 base units, and 1 liter per millisecond equals 1 base unit, so dividing one by the other gives the direct gallon per seconds-to-liter per millisecond factor of 0.003785411784.
Simple example
1 gal/s × 0.003785411784 = 0.0037854118 L/ms
1 gallon per seconds = 0.0037854118 liters per millisecond.
Real-world example
60 gal/s × 0.003785411784 = 0.227124707 L/ms
60 gallon per seconds = 0.227124707 liters per millisecond.
Conversion table
| Gallon per Seconds (gal/s) | Liter per Millisecond (L/ms) |
|---|---|
| 0.1 gal/s | 0.0003785412 L/ms |
| 1 gal/s | 0.0037854118 L/ms |
| 10 gal/s | 0.0378541178 L/ms |
| 60 gal/s | 0.227124707 L/ms |
| 100 gal/s | 0.3785411784 L/ms |
| 1,000 gal/s | 3.785411784 L/ms |
Reverse conversion: Liter per Millisecond to Gallon per Seconds
0.0037854118 L/ms × 264.1720524 = 1.000000004 gal/s
0.0037854118 liters per millisecond = 1.000000004 gallon per seconds.
gallon per seconds = liters per millisecond × 264.172052358
For a page dedicated to this direction, see Liter per Millisecond to Gallon per Seconds.
Understanding the Gallon per Seconds (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 gallon per seconds?
1 gallon per seconds equals 0.0037854118 liters per millisecond, using the exact defined conversion factor rather than an estimate.
How do I convert gallon per seconds to liter per millisecond?
Multiply the gallon per seconds value by 0.003785411784. The converter above does this instantly to whatever precision you set.
How do I convert liter per millisecond back to gallon per seconds?
Use the reverse factor: 1 liter per millisecond equals 264.1720524 gallon per seconds. You can also use the swap control in the converter above to flip the direction instantly.
What is a gallon per seconds?
Gallon per Seconds (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 gallon per seconds to liter per millisecond conversion exact?
Yes. Both gallon per seconds and liter per millisecond are defined by fixed standards rather than physical artifacts, so the factor of 0.003785411784 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.