From liters per minute (L/min)
- Liters per minute to Liters per secondL/min → L/s
- Liters per minute to Cubic meters per hourL/min → m³/h
- Liters per minute to US gallons per minuteL/min → gpm
- Liters per minute to Cubic feet per minuteL/min → cfm
Flow Rate conversion family
Flow Rate unit conversions
Volumetric flow rate is volume divided by time. This family uses litre per minute as its calculation base while retaining exact SI and defined customary volume relationships.
Five named units
Unit and factor reference
| Unit | Symbol | Factor to base | Relationship | Definition and variant |
|---|---|---|---|---|
| liter per minute | L/min | 1 | defined | A litre per minute is a volumetric flow of one litre during one minute. Named variant: Volumetric flow; no standard-condition normalization. The base factor is exactly 1 by the family base-unit choice. |
| liter per second | L/s | 60 | exact | Because one minute is exactly 60 seconds, 1 L/s = 60 L/min exactly. Named variant: Volumetric flow; no standard-condition normalization. The time relationship is exact. |
| cubic meter per hour | m³/h | 16.6666666667 | approximate | One cubic metre is exactly 1000 litres and one hour is exactly 60 minutes, so 1 m³/h = 1000/60 L/min. Named variant: Volumetric flow; no standard-condition normalization. The preserved base factor is a rounded decimal representation of the exact ratio 50/3 L/min. |
| US gallon per minute | gpm | 3.785411784 | defined | One U.S. liquid gallon per minute equals exactly 3.785411784 litres per minute because the U.S. gallon is exactly 231 international cubic inches. Named variant: U.S. liquid gallon only; not Imperial gallon. The terminating base factor is exact for the U.S. liquid gallon and international inch. |
| cubic foot per minute | cfm | 28.316846592 | defined | One cubic international foot per minute equals exactly 28.316846592 litres per minute. Named variant: International-foot volume; actual volumetric flow unless another condition is explicitly stated. The terminating factor is exact because the international foot is exactly 0.3048 m and the litre is exactly 10^-3 m³. |
Every ordered pair
All 20 flow rate calculators
From liters per second (L/s)
From cubic meters per hour (m³/h)
From us gallons per minute (gpm)
From cubic feet per minute (cfm)
Evidence and review status
This family is machine-reviewed-pending-human. Automated checks verify structure, factor parity and source references; they do not constitute human or specialist approval.
Family assumptions and limits
- This family converts non-negative volumetric flow only; it does not convert mass flow, velocity, or total delivered volume without a duration.
- US gallon per minute means the U.S. liquid gallon of exactly 231 cubic inches, not the Imperial gallon.
- Cubic foot per minute uses the international foot, not a legacy survey-foot volume.
- Gas flows quoted at standard or actual conditions require temperature and pressure normalization that this unit-only converter does not perform.
- A conversion does not add significant figures to the source measurement.
Authoritative references
- The International System of Units (SI), 9th edition, version 4.01; Bureau International des Poids et Mesures; Cover (V4.01, June 2026); Table 8 on p. 140 defines 1 L = 1 dm³ = 10^-3 m³ and 1 min = 60 s; chapter 3 defines decimal multiples.; accessed 2026-08-07
- 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; Volume Divided by Time table: ft³/min = 4.719474 E-01 L/s and U.S. gal/min = 6.309020 E-02 L/s at displayed precision.; accessed 2026-08-07
- NIST Handbook 44 (2026), Appendix C: General Tables of Units of Measurement; National Institute of Standards and Technology; Pages C-5, C-9 to C-10, and C-13 to C-16: U.S. gallon = 231 in³, international foot/inch definitions, 1 ft³ = 28.316846592 L, and 1 U.S. gal = 3.785411784 L.; accessed 2026-08-07