Fitness Metrics
Heart-rate zones, Ruffier index and TRIMP training-load calculators
Heart Rate Zone Calculator
Calculate five heart-rate training zones from age, resting heart rate, HRmax formula and either %HRmax or Karvonen HRR method.
Ruffier Test Calculator
Calculate Ruffier and Ruffier-Dickson index from 15-second pulse counts before squats, after squats and after one minute of recovery.
TRIMP Calculator
Calculate training impulse using Banister, Edwards or Lucia TRIMP and review weekly load, monotony and strain.
Cadence Calculator
Calculate running cadence, pace and stride length or cycling RPM, speed and gear development with reverse target-speed modes.
Calories Burned by Activity Calculator
Estimate calories burned for common activities using MET values, body weight and duration, with a ranked activity comparison table.
MET Calculator
Calculate MET, calories, MET-minutes and VO2 from an activity, manual MET value or oxygen uptake input.