0:00 min/km
Estimated pace
Estimated 5K Finish
0:00:00
Estimated 10K Finish
0:00:00
Estimated Half Marathon Finish
0:00:00
Estimated Marathon Finish
0:00:00
Tip: Use the estimated splits to plan pacing strategy and practice run segments at your target pace.
Inputs: Enter race distance and your target finish time. The calculator divides the total time by distance to compute pace per unit (time per kilometer or mile).
Unit conversions: Results show pace per kilometer and per mile, plus speed in km/h. Toggle distance units to convert and recalculate automatically.
Estimated splits: The tool extrapolates your target pace to give estimated split times for common race distances (5K, 10K, half marathon, marathon).
Rounding options: Choose rounding preferences (no rounding, nearest second, 5s, 10s) to match how you prefer to pace your runs.
Live updates: Results update as you change inputs so you can experiment with different race plans and goals.
- Select distance unit: Choose kilometers or miles depending on your event or training plan.
- Pick a preset or enter a custom distance: Use the preset buttons for common races or type your exact distance in the custom field.
- Set your target finish time: Use the hours/minutes/seconds controls to specify the goal time you want to achieve.
- Choose output and rounding: Select whether you want pace per kilometer or per mile and your rounding preference.
- Review results: See pace per unit, equivalent pace conversions, speed (km/h), and estimated race finish times for common distances. Use the splits to plan how fast to run each segment.
Example: For a 10K target of 50:00, the calculator will show an average pace of 5:00 per km (~8:03 per mile) and estimate your 5K split and half-marathon equivalent times.
What is running pace?
Running pace is the average time it takes you to run a unit of distance, commonly expressed as minutes per mile or minutes per kilometer.
How accurate are the estimated splits?
Splits are calculated directly from your average target pace. They are estimates and don’t account for terrain, weather, or fatigue—use them as planning guides.
Should I use per-mile or per-kilometer pace?
Use the unit that matches your training or race. U.S. races commonly use miles, while many international events use kilometers. This tool supports both and provides conversions.
Is my data saved?
No — calculations happen in your browser; inputs are not stored or transmitted to a server.
How do I use splits for race strategy?
Use the splits to plan even pacing (consistent pace), negative splits (run second half faster), or target-specific segments for training. Adjust your target time and practice those paces in workouts.