Race Pace & Split Calculator
Enter a goal race time—or your personal best and training effort—to calculate even-pace splits, cumulative checkpoints, and pace per kilometer or mile. Built for athletes and coaches planning workouts and race targets.
Build your split plan.
Select a race distance and goal. The tool assumes a constant average speed, so every split adds up to the calculated finishing time.
Set your pace
Choose how you want the finishing time calculated.
Your pacing plan
Calculated from your selected distance and time.
Split-by-split checkpoints
| # | Checkpoint | Segment | Split time | Elapsed | Remaining |
|---|
Times are mathematical even-pace checkpoints shown to hundredths. The final partial split is included. Rounded split labels may not sum exactly; cumulative times use unrounded values.
Two ways to set a pace.
Race goals and training efforts solve different problems. This calculator separates them so an athlete can plan both without confusing percent-of-speed with percent-of-time.
Race-target splits
Choose a distance and target finish. The tool divides total time proportionally across your checkpoints to calculate even splits.
PB-speed efforts
Enter your personal best at that same distance. At 90% PB speed, projected time equals PB time Ă· 0.90, not PB time Ă— 0.90.
Checkpoints, not promises
These calculations assume constant average speed. Real races, hills, tactical moves, and acceleration can produce uneven splits.
What are the splits for a 4:30 1500m?
A 4:30.00 finish equals 270 seconds over 1500 meters. At constant speed, each 400m takes 72 seconds and the final 300m takes 54 seconds. The cumulative checkpoints are 1:12, 2:24, 3:36, and 4:30. You can print or export the exact split chart using the calculator above.
Race pace calculator FAQs
Can I calculate 800m, 1500m, mile, 3200m and 5K splits?
Yes. Choose one of the standard distance presets or enter a custom distance. Use any supported checkpoint interval, including partial final segments.
Is a 1600m race the same distance as a mile?
No. A mile is exactly 1609.344 meters, which is 9.344 meters longer than 1600m. This calculator treats those as separate events. See NIST's defined mile conversion.
How do I calculate 90% of personal-best speed?
Divide your PB time by 0.90. For example, a 4:00 PB at 1500m corresponds to 4:26.67 at 90% of the same average speed. This is a mathematical training pace, not an individual physiological threshold or guaranteed workout prescription.
Do the split times include a final shorter section?
Yes. For a 1500m race with 400m checkpoints, the final segment is 300m. Mile races use the full 1609.344m distance.
Is this an NCAA altitude or track-size conversion tool?
No. This page calculates even pacing and time-based training checkpoints. It does not apply NCAA qualifying adjustments, altitude corrections, banked-track conversions, or wind estimates. Use the dedicated tools when those questions arise.
Related tools and resources
Use the right tool for the next question—without guessing at race equivalents or official qualifying adjustments.