Speed Converter
Convert mph to km/h, m/s to km/h, knots and feet per second — and see the matching running pace.
About this tool
Enter a speed, pick the unit you have and the unit you want. You get the exact conversion, the same speed in every unit at once, and the pace in minutes per kilometre and per mile. Uses the exact definitions: 1 mph = 1.609344 km/h and 1 knot = 1.852 km/h.
Frequently asked questions
Multiply by 1.609344, because a mile is exactly 1,609.344 m. So 60 mph = 96.56 km/h and 70 mph = 112.65 km/h. To go back, divide km/h by 1.609344: 100 km/h = 62.14 mph.
Multiply by 3.6, since an hour has 3,600 seconds and a kilometre 1,000 metres. A wind of 10 m/s is 36 km/h (22.37 mph); to go from km/h to m/s divide by 3.6, so 90 km/h = 25 m/s.
One nautical mile (exactly 1,852 m) per hour, so 1 knot = 1.852 km/h = 0.514 m/s = 1.151 mph. Knots are used at sea and in aviation; 20 knots is 37.04 km/h.
Pace is time per distance: minutes per km = 60 ÷ km/h. At 12 km/h you run 5:00 min/km (8:03 min/mile); at 10 km/h it is 6:00 min/km. The converter shows the pace for any speed you enter.
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