Fitness Calculator

  • Cycling Power Zones Calculator
    Calculate your 7 cycling power training zones from FTP using the Coggan model. Get watt ranges for endurance, tempo, threshold, VO2 max and more.
  • Training Pace Calculator
    Turn a recent race time into easy, tempo, threshold and long-run training paces. Free running pace calculator showing seconds per km for each zone.
  • Running Split Calculator
    Calculate your per-split time and total finish time from your target running pace and distance. Plan even splits for races and training runs.
  • Steps to Km Calculator
    Convert steps to kilometers instantly. Enter your step count and height to estimate distance walked in km, meters, and miles using stride length.
  • Steps to Miles Calculator
    Convert your step count to miles using your height. Estimate walking distance from steps with an accurate, height-based stride length formula.
  • Race Time Improvement Calculator
    Calculate how much faster your new race time is versus your old time. See the percent improvement and seconds saved instantly.
  • Race Time Predictor Calculator
    Predict your race finish time at any distance using Riegel's formula. Enter a known time and distance to forecast 5K, 10K, half & full marathon times.
  • Magic Mile Calculator
    Use Jeff Galloway's Magic Mile time trial to predict your 5K, 10K, half marathon and marathon race pace and finish times.
  • MET Minutes Calculator
    Calculate MET-minutes from any activity's MET value and duration. Find per-session and weekly physical activity totals to track exercise intensity.
  • Marathon Pace Calculator
    Calculate your required marathon pace per mile and per kilometer from your goal finish time. Free, fast marathon pace calculator for runners.
  • Max Heart Rate Calculator
    Estimate your maximum heart rate (HRmax) from age using the Fox (220 − age) or Tanaka (208 − 0.7 × age) formula, plus training heart-rate zones.
  • Heart Rate Zone Calculator
    Calculate your 5 heart rate training zones from age or HRmax. Find target bpm ranges for fat burn, endurance, and peak performance.
  • Heart Rate Recovery Calculator
    Calculate your heart rate recovery (HRR) — the bpm drop one minute after peak exercise. Enter peak and recovery heart rate to gauge fitness.
  • Bruce Protocol METs Calculator
    Estimate METs and VO2 max from your Bruce treadmill protocol exercise time. Enter total minutes and gender to gauge cardiorespiratory fitness.
  • Anaerobic Threshold Calculator
    Estimate your anaerobic threshold (AT) heart rate from age and intensity percentage. Uses AT_HR = % × (220 − age) for training zone targeting.
  • Music Activity Calorie Burn Calculator
    Estimate calories burned playing an instrument, marching band, singing or conducting using the METs formula: METs x kg x hours x 1.05. Free and instant.
  • Half Marathon Pace Calculator
    Calculate your half marathon pace per km and per mile from your finish time. Get average pace, speed in km/h and mph for the 21.0975 km distance.
  • Calories Burned Weight Lifting Calculator
    Estimate calories burned weight lifting using the MET formula. Enter your body weight, workout duration, and intensity to get instant kcal results.
  • 5K Pace Calculator
    Calculate your 5K running pace per kilometer and per mile from your finish time. See pace, speed in km/h and mph instantly.
  • Calories Burned Biking Calculator
    Estimate calories burned cycling from your weight, speed and time. Uses MET values to give accurate kcal totals for any bike ride.
  • Jump Rope Calorie Calculator
    Estimate calories burned jumping rope by weight, duration and intensity. Uses the standard MET formula (MET 8.8–12.3) for fast, accurate results.
  • Horseback Riding Calorie Burn Calculator
    Estimate calories burned horseback riding by gait (walk, trot, canter, jump), duration and body weight using the MET-based energy formula.
  • Weight Loss Calculator
    Estimate how fast you'll lose weight from your daily calorie deficit. Enter your TDEE and intake to get kg and lb lost per week and month.
  • Walking Calorie Calculator
    Estimate calories burned walking from your weight, speed and time. Uses MET values to give kcal burned, calories per minute and distance covered.

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