Running Pace Splits Calculator

It converts your goal time to total seconds, then divides by the distance to get seconds per kilometre or mile. That pace is shown in minutes and seconds rounded to the nearest second.

Even pacing means running every kilometre or mile in the same time. Each cumulative split is the pace multiplied by the mark number, so the plan assumes a steady effort from gun to finish.

A marathon is 42.195 km, not a whole number. The table lists the 42 whole-kilometre splits, then adds one final row at 42.195 km showing your exact goal finish time.

Yes. Switch the unit selector to Miles and every split shows the cumulative clock time at each mile marker, with the pace shown per mile.

Each cumulative time is rounded to the nearest whole second before formatting. Times of an hour or more read as h:mm:ss, and shorter times read as m:ss.

Many runners run the second half slightly faster than the first, which is a negative split. Use this even-pace plan as a baseline, then bank a little time by easing the early marks if you prefer.

No. It spreads your goal time evenly over the distance and assumes flat, steady conditions. On a hilly course you will need to run some marks faster or slower than the even split.

Any positive distance works. Enter something like 7.5 km or 3.2 mi and the tool builds whole-mark splits up to the last full unit, plus a final row at your exact distance.

Yes. Every split is computed in your browser and nothing is uploaded. Your distance and goal time stay on your device, and the Copy button just puts the table on your clipboard.