Speed Converter
Convert between miles per hour, kilometers per hour, meters per second, feet per second, knots and Mach, with a full table for every unit. Runs in your browser.
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Convert Any Speed Instantly
This free speed converter changes a speed from one unit to another, right in your browser. Enter a value, pick the unit you have and the unit you want, and see the answer instantly along with a full table of the same speed in every unit. It covers mph, km/h, m/s, feet per second, knots and Mach.
Everything runs in your browser, with no signup. It is handy for travel, driving abroad, physics homework, running and cycling pace, boating and aviation.
How to Use the Speed Converter
- 1Type the speed value.
- 2Choose the unit you are converting from.
- 3Choose the unit you want to.
- 4Read the answer, or open the table to see every unit.
Why Use MakeToolz's Speed Converter?
All common units
mph, km/h, m/s, ft/s, knots and Mach in one place.
Full conversion table
See your speed in every unit at once, not just the one you picked.
Instant and accurate
Uses exact conversion factors and updates as you type.
Both directions
Convert from or to any unit by swapping the selectors.
100% in your browser
No signup and nothing uploaded; it runs locally.
Free and simple
A clean speed converter, free with no limits.
Why Convert Speed Units
Speed is measured differently around the world, so converting between units is a daily need. Drivers use mph in the US and UK but km/h almost everywhere else, so travelers convert to read speed limits. Students convert to m/s for physics. Runners and cyclists switch between pace and speed, and sailors and pilots use knots. This converter handles all of them with exact factors, and it shows the same speed in every unit at once so you never have to convert twice.
Because it runs entirely in your browser, it is fast and private, with no signup and no limit.
Common Speed Conversions
| From | To | Multiply by |
|---|---|---|
| mph | km/h | 1.609 |
| km/h | m/s | 0.2778 |
| knots | km/h | 1.852 |
| m/s | mph | 2.237 |
People Also Ask
How do I convert km/h to mph?
Enter the value, set from to kilometers per hour and to to miles per hour. One km/h is about 0.621 mph.
How many m/s is 100 km/h?
100 km/h is about 27.78 m/s. Enter 100 and convert from km/h to m/s.
What is Mach 1?
Mach 1 is the speed of sound, about 343 m/s or 1,235 km/h at sea level. It varies with air temperature and altitude.
How fast is a knot in mph?
One knot is about 1.151 mph. Convert from knots to mph for any value.
Is the speed converter accurate?
Yes. It uses exact conversion factors, so the results are precise to several decimal places.
Does it work offline?
Once the page loads, the conversion runs locally with no server, so it keeps working on a flaky connection.