SWOLF Calculator
SWOLF measures swim efficiency: how few strokes and how little time it takes to cross a pool length. Lower is better.
What is SWOLF?
SWOLF ("swim golf") adds your stroke count for one pool length to your time in seconds for that length. Like golf, a lower score means you covered the distance more efficiently. For freestyle in a 25m pool, a normalized score under 36 is excellent, 36–42 is good, and above 50 usually means there's real room to improve technique rather than just swimming harder.
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