Speed Converter
Convert between mph, km/h, m/s, and knots.
About this converter
Speed limits, wind speeds, and vehicle specs are quoted in different units depending on where you are — mph in the US, km/h almost everywhere else, and knots for anything nautical or aviation-related. This converts between all of them plus the SI base unit, meters per second.
Frequently asked questions
- What's a knot, exactly?
- One nautical mile per hour — about 1.15 mph. Used in maritime and aviation contexts specifically because it relates directly to a minute of latitude.