ucUnitCloudInternational unit matrix

Mistake guide

Confusing l/min and m³/h

A flow rate of 10 l/min corresponds to 10 m³/h.

01Assumption

A flow rate of 10 l/min corresponds to 10 m³/h.

02Actually

10 l/min is 0.6 m³/h. In an hour 600 litres flow, and 600 litres is 0.6 cubic metres. The conversion factor is 0.06.

03Why

Both units describe the same thing, just with a different time unit and a different volume measure. Pump and heating datasheets mostly use m³/h, fittings and flow meters l/min. The factors 60 and 1000 act together and are easily applied only halfway.

04Check

Convert the time first, then the volume: l/min times 60 gives l/h, divided by 1000 gives m³/h. For rough estimates divide l/min by 16.67 to get m³/h.

Matching conversions

Litre per minute to Cubic metre per hourl/min → m³/hFlow rateCubic metre per hour to Litre per minutem³/h → l/minFlow rateLitre per second to Cubic metre per hourl/s → m³/hFlow rateLitre per minute to Litre per secondl/min → l/sFlow rate

Matching tables

TableFlow rate: m³/h, l/min and l/s

Unit family: Flow rate

Sources

BIPM SI BrochureSI base units, prefixes and official SI context.NIST Guide to SI Appendix BNIST conversion-factor method and non-SI factors.
When not to use

Do not use as the sole basis for official, medical, safety-critical or contractual decisions.

Citation

Citation note: UnitCloud, mistake guide, sources reviewed: September 2026. Source basis: BIPM SI Brochure · NIST Guide to SI Appendix B.