Watshoo Tools
Tools for your run
Free pace, race time and treadmill calculators, plus a running shoe size guide. No account needed.
Shoe size guide
Compare a size that fits you with another brand. Free, without an account.
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Race Pace Calculator
Turn a target finish time into pace, speed and useful race splits.
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Race Time Predictor
Estimate race potential and training paces from a recent result.
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Treadmill Pace Converter
Convert between km/h and min/km and see your min/mile pace. Use the calculator or the pace chart below.
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100% freeNo sign-in required.