About Speed Converter
The Speed Converter converts between kilometers per hour, miles per hour, meters per second, feet per second and knots. It's perfect for comparing speed limits abroad, converting running paces, or making sense of wind speeds given in knots.
Enter any value and switch units freely — the tool uses exact definitions (1 mph = 0.44704 m/s, 1 knot = 1.852 km/h) so results hold up for engineering and navigation use, not just rough estimates.
All math happens client-side, so conversions are instantaneous.
How to Use the Speed Converter
- Type the speed you want to convert.
- Choose the source unit (say km/h) and the target unit (say mph).
- Read the converted speed instantly, or swap the direction with one click.
Features
- Five speed units: m/s, km/h, mph, ft/s and knots
- Exact conversion factors used in aviation and engineering
- Instant results with one-click unit swap
- Free, offline-capable and mobile friendly
Frequently Asked Questions
How fast is 100 km/h in mph?
100 km/h is about 62.14 mph. One mile is 1.609344 kilometers exactly.
What is a knot?
One knot is one nautical mile per hour — exactly 1.852 km/h or about 1.15 mph. Knots are the standard speed unit in shipping and aviation.
Is the Speed Converter free?
Yes, the Speed Converter is completely free with no usage limits. No signup, no account and no installation required.
Does the Speed Converter work on mobile?
Yes. The Speed Converter is fully responsive and works in any modern browser on phones, tablets and desktops.
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