Convert between all speed and velocity units instantly: miles per hour, kilometers per hour, meters per second, knots, feet per second, mach, and more. Real-time conversion with formulas and reference table.
Our free Speed Converter supports instant conversion between all common speed units — metric, imperial, nautical, and scientific. All calculations happen in your browser — no data is sent to any server. Perfect for driving, aviation, maritime, sports, physics, and everyday speed conversions.
Our converter uses exact conversion factors based on international standards (NIST/ISO). Results are accurate to 10 decimal places for all supported units.
Yes! You can convert between any two units — metric to imperial, imperial to metric, nautical to metric, or within the same system.
A knot (kn) is a nautical unit of speed equal to one nautical mile per hour, or approximately 1.852 km/h (1.151 mph). It is commonly used in maritime and aviation navigation.
Absolutely. All conversions happen entirely in your browser. No data is ever sent to our servers or stored anywhere.