Negative Split Calculator: Race Pacing Plan
THE DRYDEN / RUNNING TOOLS EVERY STRIDE COUNTS
NEGATIVE SPLIT CALCULATOR
Hold back.
Finish faster.
Plan a race where the second half is faster than the first. See the times and paces for each half and every split.
Prefer even pacing? Generate even, negative or faster-start splits.
Race split calculatorBEHIND YOUR NUMBER
A little understanding
goes a long way.
How much faster should the second half be?
1–3% is typical. For a 2-hour half marathon, a 2% negative split means about 1:00:36 then 59:24.
Why does it work?
Starting slightly slower saves glycogen and keeps lactate under control, so you can push harder when it matters.
Is this calculator for me?
It suits anyone who runs, from beginners to club runners. Results are estimates based on standard formulas. Heat, hills, wind and how you feel on the day all change real performance.
YOUR RUN. A CLEARER PLAN.Calculations happen on your device.