ArchSupply Utilities

Miles Per Hour to Knot Converter

Instant, two-way conversion across common engineering units.

Free

1 mph = 0.86897624 kn(Miles per hour → Knot)

Recent conversions
Your last five conversions will appear here.

Converting miles per hour to knots

To convert miles per hour to knots, multiply the value by 0.86897624. Speed conversions appear in wind loading, air velocity in ducts and transport analysis, where codes mix metric and imperial units.

Miles Per Hour (mph)

Miles per hour (mph) is the road and wind speed unit in the US and UK.

Origin
Derived from the statute mile of 1,609.344 m.
Where it is used
Used for design wind speeds in US codes and for traffic and transport data.
Relation to SI
1 mph = 0.44704 m/s exactly.

Knot (kn)

The knot (kn) is one nautical mile per hour.

Origin
A marine and aviation unit based on the nautical mile of 1,852 m.
Where it is used
Used in marine works, aviation and meteorological wind data.
Relation to SI
1 kn = 0.514444 m/s.

Frequently asked questions

How many knots are in one mile per hour?

1 mph equals 0.86897624 kn.

How do I convert miles per hour to knots?

Multiply the value by 0.86897624. For example, 10 mph equals 8.6897624 kn.

How do I convert back from knots to miles per hour?

1 kn equals 1.1507794 mph. The converter above works in both directions, so you can type into either field.

Which speed unit do wind load codes use?

Eurocode and most metric standards state basic wind speed in meters per second, while US standards such as ASCE 7 use miles per hour. Check the averaging period as well as the unit.

What is a knot?

One knot is one nautical mile per hour, about 0.514 m/s. It is standard in marine works, aviation and meteorological data.

Is this speed converter free to use?

Yes. Every unit conversion runs in your browser, needs no account and is free for professional use.

Related conversions