Tools you might need next
Calculate swimming pace per 100m or 100yd from split times and distance. Convert between pace formats for pool and open water training plans.
Calculate pool laps, lengths, and distance from swim count. Convert between 25m, 25yd, and 50m pools for accurate distance tracking.
Calculate critical swim speed (CSS) threshold pace from 400m and 200m time trial results. Set aerobic training zones for swimmers and triathletes.
Divide target finish time equally across laps or 100m segments. Even pacing minimizes energy waste from early surging.
Split = Total time ÷ Number of splitsSlightly slower first half (51%) and faster second half (49%) is the classic negative split. Adjust ratio based on event distance and personal tendency.
First half = Total × 0.51 | Second half = Total × 0.49Sum individual splits for checkpoint times at each 100m or lap. Compare actual cumulative times during the race to stay on pace.
Cumulative(n) = Σ split(1..n)Updated: July 2026
Target 18:00 total with even 100m splits of 1:12. Check cumulative times at 500m (6:00), 1000m (12:00), and finish at 18:00.
Plan 5:20 total with first 200m in 2:44 and second 200m in 2:36 — building speed through back and breast while saving legs for freestyle.
Generate 1:25 per 100 even splits for a 14:00 1000m set, holding consistent pace across all repetitions.
Proper race pacing starts with a split plan. Enter target total time and distance to generate even splits per lap or per 100, or specify negative split strategy where the second half is faster than the first for optimal performance.