Free Tool
Running Split Calculator | Running
Running Split Calculator - Generates per-kilometer split times for any distance
Built by an engineer who chases finish lines and is obsessed with data. Thomas Prommer — technology executive who has worked with Google, Apple, Nike, Adidas, Netflix and other global brands. Also an Ironman finisher, HYROX Pro Division competitor, and marathon runner. These tools combine engineering rigor with real race experience.
Running Split Calculator
Generates per-kilometer split times for any distance.
Methodology
Generates per-kilometer split times for any distance. Even splits maintain consistent pace throughout. Useful for race planning and pacing strategy.
FAQ
How does this calculator work?
Generates per-kilometer split times for any distance. Even splits maintain consistent pace throughout. Useful for race planning and pacing strategy.
What units are supported?
km, miles, min/km, min/mi, km/h, mph. Toggle between metric and imperial.
How accurate is this?
Mathematically exact for pace/speed/time conversions. Real-world performance varies with conditions.
Can I use this for race planning?
Yes, use the split times and pace bands for race day execution strategy.