Convert

Miles per hour to Metres per second

Exact answer: 1 mph = 0.44704 m/s (exact defined factor)

Miles per hour and Metres per second describe the same quantity from the Speed family but come from different systems of units. The factor is defined exactly. Speed appears in vehicle data, sports figures, weather reports and shipping.

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What do you want to convert?

From1 mph

Result0.44704 m/s

Factor1 mph = 0.44704 m/s

Source basisBIPM SI Brochure · NIST Guide to SI Appendix B

Examples

011 mph = 0.44704 m/s

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

02Common mistake

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

03Base unit: m/s

1 mph = 0.44704 m/s. Then the value is converted through the base unit m/s into Metres per second.

Table

Miles per hour to Metres per second
Miles per hour	Metres per second
1	0.44704
10	4.4704
30	13.4112
60	26.8224
100	44.704
200	89.408

Formula

1 mph = 0.44704 m/s. Then the value is converted through the base unit m/s into Metres 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

Miles per hour to Kilometres per hourmph → km/hSpeed Kilometres per hour to Miles per hourkm/h → mphSpeed Metres per second to Kilometres per hourm/s → km/hSpeed Kilometres per hour to Metres per secondkm/h → m/sSpeed

Search and practice paths

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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. Speed. Source basis: BIPM SI Brochure · NIST Guide to SI Appendix B.

Common questions

What is the factor for Miles per hour to Metres per second?

1 mph = 0.44704 m/s

Which formula does Miles per hour to Metres per second use?

1 mph = 0.44704 m/s. Then the value is converted through the base unit m/s into Metres per second.

What is the most common mistake?

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

When should I verify the result?

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