Convert

Cubic metre per hour to Litre per second

Exact answer: 1 m³/h = 0.277777777778 l/s (exact defined factor)

Cubic metre per hour and Litre per second describe the same quantity from the Flow rate family but come from different systems of units. The factor is defined exactly. Flow rate is used in heating, plumbing, process engineering and irrigation.

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UnitCloud is a local measurement lab for everyday work, engineering, IT, energy, mobility and design. Every conversion shows result, formula, base unit, rounding and the common mistake.

What do you want to convert?

From1 m³/h

Result0.277778 l/s

Factor1 m³/h = 0.277777777778 l/s

Source basisBIPM SI Brochure · NIST Guide to SI Appendix B

Examples

011 m³/h = 0.277778 l/s

Example value from the reference table. Internal calculation uses stored factors; display output is rounded.

02Common mistake

Flow rate is volume per time, not volume. A pipe volume in litres cannot be converted into l/min directly; the time base is required.

03Base unit: m³/s

1 m³/h = 0.000277777777778 m³/s. Then the value is converted through the base unit m³/s into Litre per second.

Table

Cubic metre per hour to Litre per second
Cubic metre per hour	Litre per second
1	0.277778
10	2.777778
36	10
100	27.777778
360	100
1,000	277.777778

Formula

1 m³/h = 0.000277777777778 m³/s. Then the value is converted through the base unit m³/s into Litre per second.

Sources

BIPM SI BrochureSI base units, prefixes and official SI context.NIST Guide to SI Appendix BNIST conversion-factor method and non-SI factors.

Related conversions

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

Search and practice paths

FormulaTableExamplesCommon mistakeEveryday/engineeringExcel/CSVBatch converterPrint view

Flow rateFlow rate in heating and plumbing Data rateReading internet speed correctly

Factor origin

Factors come from the stored source family and are not derived from rounded display values.

Rounding rule

UnitCloud keeps calculating with stored factors and rounds only the displayed output by selected precision.

When not to use

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

Citation

Citation note: UnitCloud, conversion with formula, sources reviewed: September 2026. Flow rate. Source basis: BIPM SI Brochure · NIST Guide to SI Appendix B.

Common questions

What is the factor for Cubic metre per hour to Litre per second?

1 m³/h = 0.277777777778 l/s

Which formula does Cubic metre per hour to Litre per second use?

1 m³/h = 0.000277777778 m³/s. Then the value is converted through the base unit m³/s into Litre per second.

What is the most common mistake?

Flow rate is volume per time, not volume. A pipe volume in litres cannot be converted into l/min directly; the time base is required.

When should I verify the result?

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