Running pace calculator
Enter any two of distance, time and pace — the third is worked out live, with your speed and a per-km splits table. Nothing is uploaded.
Distance
Time
h
min
s
Pace
min
s
—Distance
—Time
—Pace
—Speed
Splits
Everything runs in your browser. No upload, no sign-up.
How it works
STEP 1
Enter what you know
Fill any two of distance, time and pace — pick a race preset for distance if you like.
STEP 2
Get the third
The missing value is calculated live, along with your speed in km/h and mph.
STEP 3
Read your splits
See the elapsed time at each kilometre or mile. All private, nothing leaves your device.