Swim Pace Calculator — calculate swim pace for training and performance. Evidence-based formula and benchmarks.
Pace per 100m = (Race time in seconds / Distance in metres) × 100
SWOLF = Stroke count per length + Time (seconds) per length — measures efficiency (lower = more efficient)
Pool conversion (SCY to LCM): LCM time ≈ SCY time × 1.11 (rule of thumb; varies by swimmer)
CSS (Critical Swim Speed) = (distance2 − distance1) / (time2 − time1) — anaerobic threshold pace estimated from two timed swims