Authoritative definitions of the International System of Units and SI prefixes.
Unit conversion
US gallons per minute to Litres per second Converter
1 gpm = 0.0630901964 L/s. Enter a value to convert gpm to L/s, then use the formula and table below. Displayed digits may be rounded.
Flow rateInstant result
Decimals
Formula result = input × 0.0000630901964 ÷ 0.001. 1 gpm ≈ 0.0631 L/s
Nonzero results too small for the selected decimal places use scientific notation.
Nonzero results too small for the selected decimal places use scientific notation.
Common examples
One value, several units
Cubic metres per second0.0001 m³/s
Litres per second0.0631 L/s
Litres per minute3.7854 L/min
Cubic metres per hour0.2271 m³/h
Cubic feet per minute0.1337 cfm
Conversion table
| gpm | L/s |
|---|---|
| 1 gpm | 0.0631 L/s |
| 2 gpm | 0.1262 L/s |
| 5 gpm | 0.3155 L/s |
| 10 gpm | 0.6309 L/s |
| 25 gpm | 1.5773 L/s |
| 50 gpm | 3.1545 L/s |
| 100 gpm | 6.309 L/s |
Conversion chart
1 gpm0.0631 L/s
5 gpm0.3155 L/s
10 gpm0.6309 L/s
25 gpm1.5773 L/s
50 gpm3.1545 L/s
Worked example
1 gpm = 0.0630901964 L/s. Apply the selected conversion formula to other input values.
Unit definition
US gallons per minute (gpm) One us gallons per minute equals 0.0000630901964 cubic metre per second.
Unit history
US gallons per minute is represented here using its modern SI definition or an internationally accepted relationship to an SI base unit.
Step by step
1. Parse the value, including fractions.
2. Convert gpm to cubic metre per second.
3. Convert the base value to L/s and apply your display precision.
Understand the result before using it
US gallons per minute to Litres per second converts a value measured in US gallons per minute (gpm) into the equivalent value in Litres per second (L/s). The numerical value changes because the size and definition of the selected unit changes; the underlying quantity does not.
Calculated result
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.
Formula, assumptions, and example
Formula
result = input × 0.0000630901964 ÷ 0.001
Assumptions
- US gallons per minute and Litres per second represent the same flow rate quantity.
- The input is expressed in gpm; the output is expressed in L/s.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 gpm = 0.0630901964 L/s. For another value, apply the same relationship and round only to the precision your source measurement supports.
When to use it
Good uses
- Read a gpm measurement in a document that expects L/s.
- Compare a us gallons per minute value with a value reported in litres per second.
- Check the gpm to L/s arithmetic before copying the result into another calculation.
Limitations
Common mistakes to avoid
- Do not confuse gpm with another unit that has a similar name or symbol.
- Round the output to a precision justified by the original measurement.
- Verify safety-critical, regulated, laboratory, and contractual conversions against the controlling standard.
Sources and further reading
These references explain the underlying standards or provide authoritative context. Your own contract, institution, clinician, product documentation, local code, or governing standard may be the controlling source.
Guidance on unit names, symbols, conversions, and numerical presentation.
Questions about this calculation
How do I convert US gallons per minute to Litres per second?
result = input × 0.0000630901964 ÷ 0.001. Input is in gpm; result is in L/s. 1 gpm = 0.0630901964 L/s. The displayed digits may be rounded.
What is 1 gpm in L/s?
1 gpm = 0.0630901964 L/s. The displayed digits may be rounded.
Can I reverse the gpm to L/s conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts L/s back to gpm.
Is the US gallons per minute to Litres per second result exact?
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.