Speed Converter
Free speed converter — km/h, mph, m/s, knots, ft/s. Driving, running, sailing, aviation. Instant, accurate, runs entirely in your browser.
Runs in your browserUpdated Apr 27, 2026
Speed converter
All speed conversions
Meter / second
33.33333333 m/s
Mile / hour
74.56454307 mph
Foot / second
109.3613298 ft/s
Knot
64.79487239 kn
Mach (sea level)
0.09718172983 Mach
Frequently asked questions
›How do I convert mph to km/h?
Multiply mph by 1.609. So 60 mph ≈ 96.6 km/h. Or just type it in.
›What is a knot?
A knot is one nautical mile per hour, equal to 1.852 km/h or 1.151 mph. Used in marine and aviation contexts.
›How fast is the speed of light?
Light in vacuum travels at exactly 299,792,458 m/s — that's about 670 million mph or 1.08 billion km/h.
›Are running paces supported?
You can convert between any speed units, but for pace conversions (e.g. min/km ↔ min/mile) use a dedicated running pace tool.
›Is the converter free?
Yes — free, no ads, runs in your browser.