// multi-utility computation suite · offline · instant · precise
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sport.swimming-stroke-efficiency Calculator
Calculates swimming stroke efficiency as distance per stroke (DPS) and stroke index (speed × DPS), the key metrics coaches use to diagnose whether a swimmer is pulling enough water per stroke. Elite open-water swimmers maintain a stroke index above 3.0.
Inputs
Pool Length M
Linear measurement. Ensure consistent units: 1 m = 1,000 mm = 3.281 ft.
Lap Time S
Duration of the process. Make sure units match the rate inputs (seconds, minutes, or hours).
Stroke Count Per Lap
Reference formula or conversion factor shown for context.
Results
SWOLF score
A numerical rating from the scoring model in use.
stroke length (m)
The computed linear length.
stroke rate (cycles/min)
The value at the specified point or condition.
velocity (m/s)
Reference formula or conversion factor shown for context.
SWOLF lower = better
Reference formula or conversion factor shown for context.
SL × SR = velocity
Reference formula or conversion factor shown for context.