Use this race split calculator to plan target split times for a 5K, 10K, 10-mile, half marathon or marathon. Enter your goal finish time to see how an even-pace strategy adds up across the distance.
Race split planner
Create cumulative even-pace splits for your target finish time.
Why this calculator is useful
Translate a target finish time into checkpoint targets so you can plan an even, controlled race.
How to use it
- Enter a recent, representative result or your planned race details, using the units shown beside each field.
- Select Calculate and review the result, including the assumptions and limitations shown.
- Use the result as a planning aid, compare it with how you feel, and recalculate when your inputs change.
Results are estimates, not guarantees. Fitness, recovery, weather, terrain, elevation and course conditions can all change the outcome.
Related running resources
All running calculators · Running guides · Training plans · UK race calendar · Triathlon and Ironman guide
Frequently asked questions
What are race splits?
Splits are your elapsed times at checkpoints such as each kilometre or mile. Cumulative splits show the total time reached at each checkpoint.
Are these splits suitable for every course?
They provide an even-pace starting point. Hills, turns, congestion, weather and aid stations may require a different strategy.
Should I start faster to bank time?
Usually it is safer to begin under control and adjust gradually than to start too fast and fade.
How to use a race split planner
Choose a realistic target based on recent training or racing. Even splits are a useful starting point, but hills, wind, turns, crowding and temperature may change the pace you can sustain. For many runners, starting under control is more useful than trying to bank time early.
Related race preparation tools
Estimate a target with the race time predictor, calculate your pace with the running pace calculator, and read the guide for your goal distance in the running goal hubs.