Liters per second to Cubic feet per minute Calculator

Direct answer

Multiply the entered liters per second value by 2.11888000328932 to express it in cubic feet per minute (cfm). This converts liter per second (L/s) to cubic foot per minute (cfm) within the documented flow rate family.

Variables and formula

• Liters per second (L/s): the source value measured in liter per second.
• Cubic feet per minute (cfm): the same quantity expressed in cubic foot per minute.
• Conversion factor: 2.11888000328932 cubic feet per minute per liter per second.

Cubic feet per minute = Liters per second × 2.11888000328932

The generator emits numeric factors with at most 15 significant digits. Calculator results keep up to 10 significant digits for display; this formatting does not increase the precision of the measurement.

Unit definitions and named variants

Source unit: liter per second (L/s). Because one minute is exactly 60 seconds, 1 L/s = 60 L/min exactly. Named variant used: Volumetric flow; no standard-condition normalization. Reference: Bureau International des Poids et Mesures: The International System of Units (SI), 9th edition, version 4.01.

Target unit: cubic foot per minute (cfm). One cubic international foot per minute equals exactly 28.316846592 litres per minute. Named variant used: International-foot volume; actual volumetric flow unless another condition is explicitly stated. Reference: National Institute of Standards and Technology: NIST Guide to the SI, Appendix B.9: Factors for Units Listed by Kind of Quantity or Field of Science; National Institute of Standards and Technology: NIST Handbook 44 (2026), Appendix C: General Tables of Units of Measurement.

The L/s-to-cfm direction remains inside the flow rate quantity; it changes the unit label and numerical scale, not the kind of quantity being measured.

Relationship and precision

The named unit relationships are defined or exact, so the conversion is exact before display rounding and source-measurement uncertainty.

• L/s relationship: The time relationship is exact.
• cfm relationship: The terminating factor is exact because the international foot is exactly 0.3048 m and the litre is exactly 10^-3 m³.

To audit the factor through the family base unit, divide the raw dataset factors 60 by 28.316846592. The generator emits that quotient once at 15 significant digits as the canonical direct factor 2.11888000328932; runtime calculations do not divide the already-emitted base factors again.

Reproducible example

For 10 liters per second, 10 × 2.11888000328932 = 21.1888000328932 cubic feet per minute. Repeating the same multiplication with the stated factor reproduces the displayed conversion before interface rounding.

Directional scale check

Because one liter per second contains 2.11888000328932 cubic feet per minute, the target number is larger than the source number for every positive input. Zero maps to zero, while negative inputs are rejected because this family models non-negative magnitudes.

Interpretation

Read the result as cubic feet per minute, not liters per second. A value entered as L/s leaves the calculator labelled cfm; this directional distinction matters even when the two units describe the same flow rate quantity.

Assumptions and limitations

• Only non-negative flow magnitudes are accepted; direction is outside this family.
• A conversion does not add significant figures to the source measurement.
• This family converts non-negative volumetric flow only; it does not convert mass flow, velocity, or total delivered volume without a duration.

Common mistakes

• This is volumetric flow, not mass flow in kg/s.
• SCFM and ACFM include gas-condition conventions that plain cfm does not encode.

Continue within the Flow Rate family

See the Flow Rate conversion hub for its five-unit reference table and all 20 directed routes.

• Reverse the direction: Cubic feet per minute to Liters per second
• Compare another flow rate route: Liters per second to Liters per minute
• Compare another flow rate route: Liters per second to Cubic meters per hour
• Compare another flow rate route: Liters per second to US gallons per minute
• Compare another flow rate route: Cubic feet per minute to Liters per minute

Assumptions

• The entered value uses liters per second exactly as labelled.
• Only non-negative flow magnitudes are accepted; direction is outside this family.
• Rounding and measurement uncertainty remain the user's responsibility.

Sources and methodology

CalcMotive publishes the formula and assumptions so you can decide whether the estimate fits your use case. See our methodology standards.

• The International System of Units (SI), 9th edition, version 4.01; Bureau International des Poids et Mesures; accessed Aug 7, 2026
• NIST Guide to the SI, Appendix B.9: Factors for Units Listed by Kind of Quantity or Field of Science; National Institute of Standards and Technology; accessed Aug 7, 2026
• NIST Handbook 44 (2026), Appendix C: General Tables of Units of Measurement; National Institute of Standards and Technology; accessed Aug 7, 2026