Speed Converter
Convert between km/h, mph, m/s, knots, and feet per second.
Try it with this example
Enter 100 km/h and convert to mph, m/s, or knots. Useful for travel and sports.
What is this tool?
The Speed Converter converts between kilometers per hour (km/h), miles per hour (mph), meters per second (m/s), knots, and feet per second. Enter 100 km/h and get 62.14 mph, 27.78 m/s, 53.99 knots, or 91.13 ft/s. Travelers comparing speed limits, athletes tracking performance, and engineers working with velocity all need quick conversions. Enter a value in one unit and see it in all the others. All processing runs in your browser.
Speed limits vary by country: 120 km/h in Europe vs 75 mph in the US. Runners think in min/km or min/mile; pilots in knots. Physics problems often use m/s. The tool covers the common units with standard conversion factors. 1 mph = 1.609344 km/h; 1 knot = 1.852 km/h. Results update in real time as you type. No server calls, no stored data.
Use it when renting a car abroad, when interpreting fitness app stats, when solving physics homework, or when comparing vehicle specs. The tool handles typical ranges—from walking speed to supersonic. For extremely precise work (e.g. geodesy), consult authoritative sources; for everyday use, the conversions are accurate.
Bookmark it for travel, sports, and quick speed checks. Simple and fast.
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