How to use this converter

Enter speed, from, to.
Select Calculate to view the result.
Check the method and assumptions below before using the result.

Input reference and sample values

Use the units and choices shown for each field. Sample values are provided for practice, not as recommendations.

Input	Format and units	Sample
Speed	Numeric value. Zero or positive.	`100`
From	Choose Kilometers per hour / Miles per hour / Meters per second / Knots.	`Kilometers per hour`
To	Choose Kilometers per hour / Miles per hour / Meters per second / Knots.	`Miles per hour`

Result for these sample inputs

62.1371192 mph

Conversion factor: 0.621371192

Select Try the example in the form to load these values and calculate them again. This replaces the current form inputs. Compare the result with the method and worked explanation below.

The method, explained

Convert the input to meters per second, then divide by the target unit’s factor. One mph is 0.44704 m/s, and one knot is 1,852 meters per hour.

A WORKED EXAMPLE

100 km/h is approximately 62.137119 mph. A speed of 10 m/s equals 36 km/h.

What to keep in mind

This converts nonnegative scalar speed, not direction or acceleration. Knots use nautical miles per hour, which differ from ordinary statute miles.

Common questions

Is a knot the same as one mile per hour?

No. A knot is one nautical mile per hour. A nautical mile is 1,852 meters.

Can I convert running speed into pace?

Use Running Pace Calculator with your distance and duration. Pace is time per distance, so its relationship to speed is reciprocal.

Methodology maintained by ClarityKit. How these tools are built and checked.

Speed Converter

Choose units and a value