How to use the pace and speed calculator
Convert running pace per kilometre to speed and finish times. Enter pace in the field above; the speed, 5 km time, 10 km time, marathon time are computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “minutes per km to km/h”, “5k time”, “marathon pace”, “calculate pace and speed”, “find speed”.
Formula
Variables
- pace — Pace (min/km)
Worked example
With pace = 5 min/km, the calculator gives speed ≈ 12 km/h; speed ≈ 7.456452 mph; 5 km time ≈ 25 min; 10 km time ≈ 50 min; marathon time ≈ 3.51625 h.
Frequently asked questions
What is the pace and speed calculator used for?
Convert running pace per kilometre to speed and finish times. It helps with questions such as “minutes per km to km/h”, “5k time”, “marathon pace”.
What is the formula for the pace and speed calculation?
Speed (km/h) = 60 / pace. Speed (mph) = [Speed] × 0.621371. 5 km time (min) = 5 × pace. 10 km time (min) = 10 × pace. Marathon time (h) = 42.195 × pace / 60. Here pace is pace (min/km).
What inputs do I need for the pace and speed converter calculator?
You need pace in min/km. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the pace and speed calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the pace and speed result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.