Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Race Time Predictor

Predict your finish time at any race distance using a recent result from a different distance. Ideal for setting realistic goals when stepping up from a 5K to a half marathon or full marathon.

Known Race Distance

Known Time (Hours) (hr)

Known Time (Minutes) (min)

Target Race Distance

Fill in the required fields to see your result.

Running

Race Split Calculator

Plan your race pace by calculating per-mile or per-km splits from your goal finish time. Use it when targeting a specific finishing time for any race distance from 5K to marathon.

Race Distance

Goal Time (Hours) (hrs)

Goal Time (Minutes) (mins)

Goal Time (Seconds) (secs)

Pacing Strategy

Fill in the required fields to see your result.

Key differences

	Race Time Predictor	Race Split Calculator
Category	Running	Running
Inputs required	4	5
Result	Predicted Time (minutes)	Average Pace per Kilometer (seconds)
What it does	Predict your finish time at any race distance using a recent result from a different distance. Ideal for setting realistic goals when stepping up from a 5K to a half marathon or full marathon.	Plan your race pace by calculating per-mile or per-km splits from your goal finish time. Use it when targeting a specific finishing time for any race distance from 5K to marathon.