Cardio & Endurance
Pace, heart rate zones, VO2 max and calories burned.
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Calories Burned Calculator
Calories burned for 60+ activities from your weight and time.
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Cycling Speed Calculator
Work out average speed, ride time or distance from the other two.
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Heart Rate Zone Calculator
Your five heart rate training zones in beats per minute.
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Rowing Split Calculator
Convert between 500 m split, watts and finish time on a rowing machine.
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Running Pace Calculator
Your pace per km and per mile from any distance and time.
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Running Time Predictor
Predict your 5K to marathon times from a recent race result.
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Steps to Calories Calculator
Turn a step count into distance, walking time and calories.
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Target Heart Rate Calculator
Your heart rate range for light, moderate and vigorous exercise.
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Treadmill Pace Converter
Turn treadmill speed into pace per km or mile, and back.
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VO2 Max Calculator
Estimate your VO2 max from a run, a walk or your heart rate.
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Zone 2 Calculator
Your zone 2 heart rate range from max or threshold heart rate.