Convert

Miles per hour to Knot

Exact answer: 1 mph = 0.868976241901 kn (exact defined factor)

Miles per hour and Knot 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

Result0.868976 kn

Factor1 mph = 0.868976241901 kn

Source basisBIPM SI Brochure · NIST Guide to SI Appendix B

Examples

011 mph = 0.868976 kn

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 Knot.

Table

Miles per hour to Knot
Miles per hour	Knot
1	0.868976
10	8.689762
50	43.448812
100	86.897624
200	173.795248
500	434.488121

Formula

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

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

Knot to Kilometres per hourkn → km/hSpeed Kilometres per hour to Knotkm/h → knSpeed Miles per hour to Kilometres per hourmph → km/hSpeed Kilometres per hour to Miles per hourkm/h → mphSpeed

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 Knot?

1 mph = 0.868976241901 kn

Which formula does Miles per hour to Knot use?

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

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.