Convert between all speed and velocity units including km/h, mph, m/s, knots, and mach. Perfect for automotive, aviation, maritime, and scientific speed calculations.
Enter a speed value and select units to convert between different velocity measurements
Follow these simple steps to convert between different speed measurements
Input the speed value you want to convert in the speed value field.
Choose your source speed unit and target unit from the dropdown menus.
Click convert to see the instant conversion result with precision.
Professional-grade features for accurate speed unit conversions
Get immediate conversion results with real-time calculation as you enter values.
All conversions performed locally - your speed data never leaves your device.
Accurate conversions using standard velocity factors for scientific precision.
Supports metric, imperial, aviation, maritime, and scientific speed units.
Fully responsive design works perfectly on smartphones, tablets, and desktops.
No registration required, no hidden fees - completely free forever.
Quick reference for frequently used speed unit conversions
| Speed | km/h | mph | Usage |
|---|---|---|---|
| City driving | 50 km/h | 31 mph | Urban speed limits |
| Highway driving | 120 km/h | 75 mph | Highway speed limits |
| Commercial flight | 900 km/h | 559 mph | Aviation cruising speed |
Get answers to common questions about speed conversion and velocity calculations
Our speed converter uses precise conversion factors and provides highly accurate results for all speed units from scientific measurements to everyday velocities with high precision.
You can convert between m/s, km/h, mph, feet per second, knots, mach, and many other speed units including scientific and aviation measurements with instant calculations.
Simply select 'Kilometers per Hour' as your 'from' unit and 'Miles per Hour' as your 'to' unit, then enter your speed value for instant conversion.
Yes, this converter supports knots for maritime and aviation use, mach for supersonic speeds, and other specialized units for professional applications.
No, all conversions are performed locally in your browser. Your speed data is completely private and not stored on our servers.
Explore more unit converters for comprehensive measurement conversions