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Converter

Kilometres per hour a Miles per hour

Knots are nautical miles per hour. mph and knots are not interchangeable imperial speeds.

Unit console

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De1 km/h
Resultado0,62137119 mph
Factor1 km/h = 0,6213711922 mph
Source basisBIPM SI Brochure · NIST Guide to SI Appendix B

Examples

0130 km/h = 18,64113577 mph

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

02Erro comum

Knots are nautical miles per hour. mph and knots are not interchangeable imperial speeds.

03Unidade base: m/s

1 km/h = 0.277777... m/s. Then the value is converted through the base unit m/s into Miles per hour.

Tabela

Kilometres per hourMiles per hour
3018,64113577
5031,06855961
10062,13711922
13080,77825499

Fórmula

1 km/h = 0.277777... m/s. Then the value is converted through the base unit m/s into Miles per hour.

Fontes

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

Conversões relacionadas

Knot a Kilometres per hourkn → km/hVelocidadeKilometres per hour a Knotkm/h → knVelocidadeMiles per hour a Kilometres per hourmph → km/hVelocidadeMetres per second a Kilometres per hourm/s → km/hVelocidade

Search and practice paths

Search and practice paths

FórmulaTabelaExamplesErro comumEveryday/engineeringExcel/CSVConversor em lotePrint view
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 current as of May 2026. Velocidade. Source basis: BIPM SI Brochure · NIST Guide to SI Appendix B.

Common questions

What is the factor for Kilometres per hour a Miles per hour?

1 km/h = 0,6213711922 mph

Which formula does Kilometres per hour a Miles per hour use?

1 km/h = 0.277777... m/s. Then the value is converted through the base unit m/s into Miles per hour.

When should I verify the result?

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