Heart Rate Zones Calculator
Compute the five classic training heart-rate zones from your estimated max heart rate so you can target the right intens...
Calculators and explainers tagged under Fitness.
Compute the five classic training heart-rate zones from your estimated max heart rate so you can target the right intens...
Estimates VO₂max from the 20m multistage fitness (beep) test level and shuttle reached: VO₂max ≈ level × 1.73 + shuttle...
Estimate calories burned during an activity from your weight, the MET value, and the duration.
Estimates VO₂max (mL/kg/min) from the distance covered in the Cooper 12-minute run test using the standard regression fo...
Estimates lower-body peak power in watts from standing broad jump distance and body mass using a simplified biomechanica...
Cycling (and running) power-to-weight ratio in W/kg — the single strongest predictor of climbing performance.
Estimate body fat percentage from circumference measurements using the US Navy tape-measure method.
Estimate age-predicted maximum heart rate via the Gellish equation HR_max = 207 − 0.7 · age, derived from a longitudinal...
Convert between pace, distance, and time for any run.
Convert running pace between minutes-per-kilometre and minutes-per-mile, plus matching speed in km/h and mph and project...
Estimate daily calorie needs (TDEE) from BMR and an activity multiplier.
Use the Karvonen formula to compute a target heart rate that respects your resting heart rate, not just your age.
Estimate calories burned walking, using your body weight, duration, and an intensity-based MET multiplier.
Estimate VO₂ max from resting and maximum heart rate — a 30-second screening estimate, not a clinical measurement.
Estimate one-rep max from weight lifted and reps using the Epley formula.
Estimate your maximum heart rate using the Tanaka formula, an accurate refinement of the classic 220 − age rule.
Estimate age-predicted maximum heart rate using the Tanaka equation HR_max = 208 − 0.7 · age, considered more accurate t...
Translate a step count into kilometres and miles using your stride length, with sensible defaults derived from height.
Pace, splits, and goal times talk about the same thing from three different angles. A short guide to keeping them straight mid-race.