Endurance Training Calculators for Athletes
Instantly convert Max Heart Rate, Lactate Threshold Heart Rate, Functional Threshold Power, Threshold Running Pace and Critical Swim Speed into precise training zones for swim, bike and run. Control intensity and make every session purposeful with simple tools built for practical training.-
![People running a race on a city street lined with palm trees.]()
Swim Calculators
Swim Calculators brings together the key tools swimmers and triathletes need to train with clarity and consistency. From Critical Swim Speed to personalised training zones, you'll find practical calculators designed to simplify pacing, guide intensity and support structured swim training. Everything is built to help you make informed decisions and get more from every session in the water.
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![Four male runners participating in a race on a bridge at sunset, wearing athletic gear and numbered bibs.]()
Bike Calculators
Bike Calculators brings together the key tools cyclists and triathletes need to train with clarity and consistency. From Functional Threshold Power and Lactate Threshold Heart Rate to maximum heart rate training zones, you'll find practical calculators designed to guide intensity, structure workouts and support smarter cycling. Everything is built to help you make informed decisions and get more from every ride.
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![A woman jogging on a paved road in a hilly, dry landscape with yellow flowers in the foreground.]()
Run Calculators
Run Calculators brings together the key tools runners need to train with clarity and consistency. From maximum heart rate and lactate threshold heart rate to personalised running pace zones, you'll find practical calculators designed to guide intensity, structure workouts and support smarter running. Everything is built to help you make informed decisions and get more from every training session.
