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Convert mph, km/h, knots, m/s, and ft/s for driving, aviation, and sports.
Speed Converter instantly converts values between different units of measurement using precise conversion factors. It supports metric and imperial systems with real-time calculations as you type.
Convert speed and velocity units instantly. Supports miles per hour (mph), kilometers per hour (km/h), meters per second (m/s), feet per second (ft/s), and knots (nautical miles per hour). Perfect for driving, running, cycling, aviation, and maritime applications.
Enter your speed value in the input field.
Select the speed unit you're converting from.
All other speed units display automatically.
Use for pace calculations by inverting the value.
Conversions use internationally standardized conversion factors (e.g., 1 inch = 2.54 cm exactly). Calculations are performed client-side in your browser using JavaScript's high-precision arithmetic for instant results without server calls.
Multiply mph by 1.60934. For example, 60 mph × 1.60934 = 96.56 km/h.
One knot equals one nautical mile per hour, approximately 1.15078 mph or 1.852 km/h.
Divide time by distance. For example, a 5-minute mile = 12 mph. Use the inverted value for minutes per mile/km.