Meters per second (m/s)
The SI unit used in physics, engineering, wind measurements, and athletic analysis.
Everyday converter
Speed Converter
Compare driving, running, cycling, aviation, maritime, and scientific speeds across km/h, mph, m/s, ft/s, and knots.
- Instant results
- Private & secureNo data is uploaded
- Works on all devices
Common speed units
- Meters per second (m/s)The unit this converter works in
- Kilometers per hour (km/h)1 m/s = 3.6 km/h
- Miles per hour (mph)1 m/s = 2.236936 mph
- Feet per second (ft/s)1 m/s = 3.28084 ft/s
- Knots (kn)1 m/s = 1.943844 kn
Conversion formula
Every conversion here uses the published factor, not a rounded one.
Example: Kilometers per hour to Miles per hour
1 km/h = 0.6213712 mph
To convert kilometers per hour to miles per hour, multiply by 0.6213712:
100 km/h = 62.13712 mph
Figures on this page are shown to seven significant digits. The converter keeps the full precision and rounds only what it displays.
Did you know?
60 mph works out at exactly 88 feet per second, which is why that figure turns up in stopping-distance rules of thumb.
A knot is one nautical mile per hour, or exactly 1.852 km/h — it is defined from the metre, not from the statute mile.
How to use this converter
- Choose unitsSelect the source and destination units for the measurement.
- Enter a valueThe converted result updates from the maintained unit formula.
- Copy and verifyCopy the result and check the units and rounding required by the destination.
Processing and privacy
Conversion math runs locally in the browser without a calculation API. This category converter can store selected units and values in the page URL so a state can be restored or shared; avoid sharing a URL that contains a value you consider sensitive. Ordinary hosting and analytics are separate from the conversion logic.
Unit guide
Road, scientific, and nautical speed units
Speed describes distance traveled per unit of time. Conversions compare both the distance unit and the time interval, although the common units here all use seconds or hours.
Kilometers per hour (km/h)
Used on roads and vehicle displays in most countries.
Miles per hour (mph)
Used for road speeds in the United States and United Kingdom.
Knot (kn)
One nautical mile per hour, used in maritime and aviation contexts.
Feet per second (ft/s)
An imperial rate that appears in engineering, ballistics, and some flow calculations.
How the math works
Speed conversion formulas
- Kilometers per hour to mphmph = km/h ÷ 1.609344Example: 100 km/h ≈ 62.1371 mph
- Miles per hour to km/hkm/h = mph × 1.609344Example: 60 mph = 96.56064 km/h
- Meters per second to km/hkm/h = m/s × 3.6Example: 10 m/s = 36 km/h
- Knots to km/hkm/h = knots × 1.852Example: 20 kn = 37.04 km/h
Quick reference
Road speed conversion reference
Common road speeds converted from kilometers per hour to miles per hour.
Kilometers per hour to miles per hour
| Kilometers per hour (km/h) | Miles per hour (mph) |
|---|---|
| 10 km/h | 6.213712 mph |
| 20 km/h | 12.427424 mph |
| 30 km/h | 18.641136 mph |
| 50 km/h | 31.06856 mph |
| 60 km/h | 37.282272 mph |
| 80 km/h | 49.709695 mph |
| 90 km/h | 55.923407 mph |
| 100 km/h | 62.137119 mph |
| 110 km/h | 68.350831 mph |
| 120 km/h | 74.564543 mph |
| 130 km/h | 80.778255 mph |
Everyday use
Practical speed conversion examples
Driving abroad
Compare a speed limit in km/h with a vehicle or road system that uses mph.
Running and cycling
Translate training speed between km/h, mph, and m/s; pace is related but uses time per distance instead.
Aviation and maritime travel
Convert knots to km/h or mph when reading aircraft and vessel speeds.
Context
Where speed units are used
Road signs use mph in the United States and United Kingdom, while most countries use km/h. Runners and cyclists may use either speed unit depending on their equipment and location.
Meters per second is standard in science and wind reporting. Knots are nautical miles per hour and remain standard for ships, aircraft, and marine weather.
Frequently asked questions
How many km/h is 60 mph?
60 mph is 96.5606 km/h. Multiply miles per hour by 1.609344 for km/h. 70 mph is 112.654 km/h.
How many mph is 100 km/h?
100 km/h is 62.1371 mph. Divide km/h by 1.609344 for mph. Highway limits often sit near this range.
How many mph is 1 knot?
1 knot is 1.15078 mph. Multiply knots by 1.150779448 for mph. Knots are common for boats and aircraft.
How many mph is 10 meters per second?
10 m/s is 22.3694 mph. Multiply m/s by 2.236936292 for mph. 1 m/s is 2.23694 mph.
Is this speed converter free with no sign-up?
Yes. This converter is free with no sign-up and no account. Use it as often as you need in your browser.