Speed Converter
Enter one speed and instantly see useful equivalents for driving, running, boating, aviation, weather, and science.
Browse conversion tools
This page uses HandyCalcHub's shared conversion engine. Visit the Converters hub to see current and future converter categories.
What this converter does
The Speed Converter changes one entered speed into several common units at the same time. It supports miles per hour, kilometers per hour, meters per second, feet per second, and knots.
How speed conversion works
Each unit is converted through a shared base unit: meters per second. For example, miles per hour convert to meters per second using the exact relationship 1 mph = 0.44704 m/s. The result is then converted from meters per second into each target unit.
Knots are nautical miles per hour. They are common in boating, aviation, and weather reports, especially for wind speed and travel over water.
Worked example
If you enter 60 mph, the converter shows 96.56064 km/h, 26.8224 m/s, 88 ft/s, and about 52.1385745 knots.
Useful conversion relationships
| Relationship | Value |
|---|---|
| 1 mph | 1.609344 km/h |
| 1 mph | 0.44704 m/s |
| 1 mph | about 1.4666666667 ft/s |
| 1 knot | 1.852 km/h |
| 1 knot | about 0.5144444444 m/s |
| 1 m/s | 3.6 km/h |
| 1 m/s | about 2.2369362921 mph |
When speed conversions are useful
Speed conversions are useful for driving, running and cycling pace checks, aviation, boating, weather and wind speed, science classes, engineering problems, and comparing speed limits or specifications written in another unit system.
Frequently asked questions
How many kilometers per hour are in 1 mph?
One mile per hour is exactly 1.609344 kilometers per hour.
How many meters per second are in 1 mph?
One mile per hour is exactly 0.44704 meters per second.
What is a knot?
A knot is one nautical mile per hour, commonly used for boating, aviation, and wind speed.
Can this converter handle decimal or negative values?
Yes. Decimal and negative values calculate normally, which can be useful for math checks, differences, or directional velocities.