Swim Training & Pace Calculators
Free, practical calculators for the numbers behind swimming — pace and SWOLF efficiency, lap distance, calorie burn, interval sets, and yard-to-meter course conversion. Educational tools for training and planning, not coaching or medical advice.
Swim Pace Calculator
Turn a swim time and distance into pace per 100 m, per 100 yd, and per 50 m, plus your speed in metres per second — and convert a pace between metres and yards
SWOLF Score Calculator
Add strokes and seconds per length into a SWOLF efficiency score, normalised to 25 m so a 50 m or 25 yd pool reads on the same scale — track a longer, quieter stroke
Swim Distance & Lap Counter
Convert lengths into total distance in metres and yards for a 25 m, 50 m, or 25 yd pool, or work out how many lengths a target distance takes
Swim Calorie Burn Calculator
Estimate the calories you burn from stroke, effort, body weight, and time in the water, using the standard MET energy model for freestyle, backstroke, breaststroke, and butterfly
Swim Interval & Set Builder
Build a set from reps, distance, target pace, and rest — with swim time per rep, total distance and time, and a send-off interval rounded to the pace clock
Yard ↔ Meter Pool Converter
Convert distances and times between short-course yards, short-course meters, and long-course meters using the exact 1 yard = 0.9144 m factor