Speed Converter
Convert between speed units including mph, km/h, m/s, knots, and feet per second. Perfect for travel, sports, and science calculations.
Convert between different speed and velocity units instantly. Supports km/h, mph, m/s, knots, and more for travel, sports, and science. All calculations happen in your browser — no data is sent to any server.
All Conversions
Common Conversions
- • 1 mph = 1.609 km/h
- • 1 knot = 1.852 km/h = 1.151 mph
- • 100 km/h = 62.14 mph
- • Mach 1 (at sea level) = 1,235 km/h = 767 mph
- • Speed of light = 299,792 km/s
How to Use
- Enter a speed value in the input field
- Select the unit you're converting from
- Select the unit you're converting to
- See instant results and all other unit conversions
Frequently Asked Questions
❓ Is this tool free?
Yes! All our tools are completely free. No registration, no hidden charges, no ads. Just open and use.
🔒 Is my data safe?
Absolutely. All calculations happen in your browser. We don't store, send, or track any of your data. Everything is processed locally on your device.
📱 Can I use this on mobile?
Yes! All our tools are fully responsive and work perfectly on smartphones, tablets, and desktops.
🌐 Do I need internet?
No! Once the page loads, you can use the tool completely offline. All calculations happen in your browser without any server connection.