Free Tool
SWOLF Calculator | Sports Calculator
SWOLF Calculator - SWOLF = time (sec) + strokes per length
Built by an engineer who chases finish lines and is obsessed with data. Thomas Prommer — technology executive who has worked with Google, Apple, Nike, Adidas, Netflix and other global brands. Also an Ironman finisher, HYROX Pro Division competitor, and marathon runner. These tools combine engineering rigor with real race experience.
SWOLF Calculator
SWOLF = time (sec) + strokes per length.
Methodology
SWOLF = time (sec) + strokes per length. Lower is more efficient. Good SWOLF: 35-45 for 25m pool. Measures swim efficiency.
FAQ
How does this calculator work?
SWOLF = time (sec) + strokes per length. Lower is more efficient. Good SWOLF: 35-45 for 25m pool. Measures swim efficiency.
How accurate is this?
Based on established sports science formulas and research.
Who should use this?
Athletes, coaches, and fitness enthusiasts of all levels.
Should I consult a professional?
Yes, especially before major changes to training or for health conditions.
Results are estimates. Consult a professional for personalized guidance.