Sports Tools Hub

Sports Tools Hub is a collection of free calculators for training, nutrition, and performance. The pitch is that the math behind training (VO2 max, one-rep max, pace zones, calorie burn) is not complicated, but it is annoying to do by hand, and most existing calculators are buried under ads.\n\n\n\n## What the calculators cover\n\n\n\nCommon fitness metrics: pace and splits, heart-rate zones, one-rep max estimates, calorie burn by activity, body composition. The formulas are standard ones from exercise science; the site lists which formula each calculator uses.\n\n\n\n## Notes\n\n\n\n- Free, no account required.\n\n- Mobile-friendly, which matters because most of these calculations happen at the gym or on the track.\n\n- The site is run as a utility. There is no training program, no coaching, no upsell to a paid plan.