Swimming Efficiency Calculator
Calculate your swimming efficiency (SWOLF score)
About this calculator
A Swimming Efficiency Calculator determines your SWOLF score, a key metric that combines stroke count and swimming time to measure your efficiency in the water. SWOLF (swimming + golf) works like golf scoring - lower numbers indicate better performance. This tool helps swimmers optimize their technique by finding the ideal balance between speed and stroke efficiency, making it essential for competitive swimmers, triathletes, and fitness enthusiasts looking to improve their swimming performance and reduce energy waste.
How to use
Enter the distance you swam (typically 25 or 50 meters/yards), your time for that distance in seconds, and your total stroke count for the swim. The calculator will add your time and stroke count together to give you your SWOLF score. Track this score over time to monitor improvements in your swimming efficiency.
Frequently asked questions
What is a good SWOLF score?
SWOLF scores vary by stroke and distance. For freestyle, scores under 40 for 25m are excellent, 40-50 are good, and above 50 need improvement.
How do I count strokes accurately?
Count each arm stroke (one arm = one stroke) from start to finish. Use underwater stroke counting or have someone count for you.
Can I use SWOLF for all swimming strokes?
Yes, but compare scores only within the same stroke type, as different strokes have naturally different stroke counts and speeds.