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Free tools

1. 6:00/km

   Running Pace Calculator

   Free running pace calculator: work out pace, finish time or distance in km or miles, with race times and even splits for 5K, 10K, half and marathon.

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2. 184bpm

   Heart Rate Zone Calculator

   Find your 5 heart rate training zones from your age or measured max HR. Uses the Karvonen method with resting heart rate, or simple % of max. Free.

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3. 69.0kg

   One Rep Max Calculator (1RM)

   Estimate your one rep max from any set of 1–12 reps with the Epley and Brzycki formulas, in kg or lb, plus a training percentage chart. Free, no sign-up.

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4. 2,220kcal

   TDEE Calculator: Daily Calorie Needs

   Estimate your maintenance calories (TDEE) and BMR with the Mifflin-St Jeor formula, in metric or imperial, with example targets to lose or gain weight.

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