What SWOLF measures
SWOLF (swim + golf) is a simple score of swimming efficiency. Like golf, lower is better:
SWOLF = time for one length (seconds) + number of strokes for that length
You can lower it by swimming faster, by taking fewer strokes, or both. Most swim watches compute it automatically for each length.
Example
In a 25-yard pool, a length in 22 seconds with 16 strokes gives a SWOLF of 38. Each stroke covers 1.56 yards, the stroke rate is about 44 strokes per minute, and the pace is 1:28 per 100 yards.
Counting strokes
Most apps count every arm pull, so one full freestyle cycle (left plus right) counts as two strokes. Some coaches count cycles instead. Use the same method every time, and count from the push-off to the wall.
Comparing scores
SWOLF depends on the pool length and on your height, so compare your own scores over time rather than with other swimmers.
| SWOLF in a 25 m or 25 yd pool | Typical level |
|---|---|
| Under 35 | Very efficient, often competitive swimmers |
| 35 to 45 | Trained recreational swimmers |
| Over 45 | Beginners or relaxed swimming |
In a 50 m pool, scores are roughly double.
How to improve
- Body position: keep hips high and head neutral to reduce drag.
- Glide and catch: an early vertical forearm moves more water per stroke.
- Kick: a steady, compact kick helps balance without wasting energy.
- Drills: catch-up, single-arm and “golf” sets where you try to lower SWOLF at a given effort.
Don’t chase it blindly
You can lower stroke count by gliding a lot, but if your time rises the score may not improve, and an overly long glide is slow in open water. Distance per stroke and stroke rate together tell the full story: elite swimmers combine both. Use SWOLF alongside pace and effort.