Your running & triathlon toolbox
Pace calculators, time charts, race estimates — everything you need to prepare your next race.
Swim Pace Calculator
Pace per 100m, speed and times for all distances
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Cycling Speed Calculator
Speed, time and distance from 10 km to 180 km
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Running Pace Calculator
Pace, speed and time from 5K to marathon
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Triathlon Calculator
Estimated total time from Sprint to Ironman
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Triathlon Checklist
Don't forget a thing on race day — gear, nutrition, prep
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Race Time Predictor
Estimate your times at every distance from a known result
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Race Nutrition
Carbs, fluid and sodium per hour from your weight and pace
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Heart Rate Zones
Training zones Z1 to Z5 from your age or max heart rate
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Also available
Detailed statistics and results of major marathons