Running Pace Calculator
Convert between pace, time, and distance for running, cycling, or walking. Enter any two of the three and get the third — plus splits for common race distances.
Inputs
Pace per kilometer
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Pace per mile
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Speed (km/h)
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Speed (mph)
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Equivalent 5K
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Equivalent 10K
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Equivalent half (21.1 km)
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Equivalent marathon (42.2 km)
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About Running Pace Calculator
Pace vs speed
Pace is time per distance (slower = higher number). Speed is distance per time (faster = higher number). Runners usually think in pace ("six-minute miles"); cyclists think in speed.
Race-equivalent estimates
The splits assume you can hold your current pace for the full longer distance — usually false for marathons (most runners slow down 5-15% from 10K pace). Use it as an upper-bound target.
Famous benchmarks
Sub-3-hour marathon: 6:52/mile (4:16/km). World record marathon: ~4:35/mi (~2:51/km), held under 2:01 since 2018. 5-minute mile: 3:06/km, a milestone for recreational runners.