How it works
lap split = goal time × (400 m ÷ race distance)
An even effort covers each metre in the same time, so the time per metre is your goal time divided by the race distance. Multiply that by 400 to get the lap split, by 200 for a half-lap, and by 1000 or 1609.344 for per-kilometre and per-mile pace. For a 1500 m in 4:00, the time per metre is 240 ÷ 1500 = 0.16 s, giving a 64-second (1:04) lap, a 32-second 200 m, and 2:40/km. When the distance is not an exact number of laps — like the 1500 m, which is three full laps plus 300 m — the final partial segment carries the remaining time so the lap-by-lap cumulative lands exactly on your goal. Real races are rarely perfectly even, but even-pace splits are the benchmark to aim for and the simplest way to stay on schedule.
Sources
- Even pacing on the track Even-pace splitting (constant time per unit distance) is the standard reference strategy for time-trial and championship track racing.
- Standard track geometry World Athletics — a standard outdoor track lap is 400 m; the 200 m is a half lap.
- Cumulative split integrity Splits are computed so the final lap’s cumulative time equals the goal exactly, with any partial lap absorbing rounding.
FAQ
How do I calculate track splits?
Divide your goal time by the race distance to get time per metre, then multiply by 400 for each lap. This calculator does it for you and lays out every lap, plus 200 m, per-km and per-mile pace.
How many laps is each race?
On a 400 m track: the 800 m is two laps, the 1500 m is three and three-quarter laps, the mile is just over four, the 3000 m is seven and a half, 3200 m is eight, the 5000 m is twelve and a half, and the 10,000 m is twenty-five.
Why is the 1500 m not a whole number of laps?
Because 1500 m is 300 m short of four full laps — it is three laps plus 300 m. The calculator shows the three full lap splits and a final 300 m segment, with the cumulative time landing exactly on your goal.
Should I run perfectly even splits?
Even splitting is the efficient benchmark and a great way to avoid going out too fast. In championship racing tactics can vary, but for a time trial or a personal best, holding steady lap splits is usually the smartest plan.
What is a good 400 m split for my goal?
It is simply your goal time divided by the number of laps. For a 20:00 5000 m (12.5 laps) that is about 96 seconds (1:36) per lap. Enter your distance and goal and the calculator gives your exact lap target.
Does this work for indoor 200 m tracks?
The pace and 200 m split apply anywhere, but the lap table assumes a 400 m outdoor track. On a 200 m indoor track, each lap is half the 400 m split shown.
Splits are an even-pace plan, not a prediction of what you can run. Tactics, wind and fatigue shift real splits. General information for training and racing, not medical or coaching advice.