Authoritative definitions of the International System of Units and SI prefixes.
Dedicated unit pair
Litres per second to Cubic feet per minute
Convert L/s to cfm instantly, then review the formula, assumptions, and rounding guidance.
Flow rateInstant result
Decimals
Formula result = input × 0.001 ÷ 0.0004719474432. 1 L/s = 2.1189 cfm
Common examples
One value, several units
Cubic metres per second0.001 m³/s
Litres per minute60 L/min
Cubic metres per hour3.6 m³/h
US gallons per minute15.8503 gpm
Cubic feet per minute2.1189 cfm
Conversion table
| L/s | cfm |
|---|---|
| 1 L/s | 2.1189 cfm |
| 2 L/s | 4.2378 cfm |
| 5 L/s | 10.5944 cfm |
| 10 L/s | 21.1888 cfm |
| 25 L/s | 52.972 cfm |
| 50 L/s | 105.944 cfm |
| 100 L/s | 211.888 cfm |
Conversion chart
1 L/s2.1189 cfm
5 L/s10.5944 cfm
10 L/s21.1888 cfm
25 L/s52.972 cfm
50 L/s105.944 cfm
Worked example
60 litres per minute equals 1 litre per second.
Unit definition
Litres per second (L/s) One litres per second equals 0.001 cubic metre per second.
Unit history
Litres per second 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 L/s to cubic metre per second.
3. Convert the base value to cfm and apply your display precision.
Understand the result before using it
Litres per second to Cubic feet per minute converts a value measured in Litres per second (L/s) into the equivalent value in Cubic feet per minute (cfm). 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 × 0.001 ÷ 0.0004719474432
Assumptions
- Litres per second and Cubic feet per minute represent the same flow rate quantity.
- The input is expressed in L/s; the output is expressed in cfm.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 L/s = 2.11888000329 cfm. 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 L/s measurement in a document that expects cfm.
- Compare a litres per second value with a value reported in cubic feet per minute.
- Check the L/s-to-cfm arithmetic before copying the result into another calculation.
Limitations
Common mistakes to avoid
- Do not confuse L/s 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 Litres per second to Cubic feet per minute?
result = input × 0.001 ÷ 0.0004719474432 Using the displayed relationship, 1 L/s equals 2.11888000329 cfm.
How many Cubic feet per minute are in one Litres per second?
One Litres per second is 2.11888000329 Cubic feet per minute. The displayed digits may be rounded.
Can I reverse the L/s to cfm conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts cfm back to L/s.
Is the Litres per second to Cubic feet per minute 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.