MPH to KPH Speed Converter
Convert between miles per hour, kilometers per hour, meters per second, knots, and feet per second.
100% client-side · no upload
How to use
- Enter the speed value you want to convert.
- Select the source unit: mph, km/h, m/s, knots, or ft/s.
- Click Convert to see the speed in all units simultaneously.
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よくある質問
- Is this mph to kph converter free?
- Yes, completely free with no signup and no usage limits.
- Does my data leave my device?
- No. All calculations run in JavaScript inside your browser. Nothing is sent to any server.
- Does it work on mobile?
- Yes. The converter is mobile-first and works on iPhone Safari and Android Chrome.