Target Heart Rate Calculator (Karvonen)
Use the Karvonen formula to compute a target heart rate that respects your resting heart rate, not just your age.
Calculators and explainers tagged under Fitness.
Use the Karvonen formula to compute a target heart rate that respects your resting heart rate, not just your age.
Estimate BMI from height and weight in either metric or imperial units, with WHO classification.
Convert running pace between minutes-per-kilometre and minutes-per-mile, plus matching speed in km/h and mph and project...
Estimate calories burned during an activity from your weight, the MET value, and the duration.
Estimate VO₂ max from resting and maximum heart rate — a 30-second screening estimate, not a clinical measurement.
Translate a step count into kilometres and miles using your stride length, with sensible defaults derived from height.
Compute the Wilks score for a powerlifting total to compare lifters across body-weight categories on a single scale.
Estimate your maximum heart rate using the Tanaka formula, an accurate refinement of the classic 220 − age rule.
Estimate calories burned walking, using your body weight, duration, and an intensity-based MET multiplier.
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.
Convert between pace, distance, and time for any run.
Estimate age-predicted maximum heart rate using the Tanaka equation HR_max = 208 − 0.7 · age, considered more accurate t...
Estimate age-predicted maximum heart rate via the Gellish equation HR_max = 207 − 0.7 · age, derived from a longitudinal...
Estimate one-rep max from weight lifted and reps using the Epley formula.
Estimates VO₂max from the 20m multistage fitness (beep) test level and shuttle reached: VO₂max ≈ level × 1.73 + shuttle...
Estimates body fat percentage using the US Navy circumference method from waist, neck, (hip for women), and height measu...
Compute the five classic training heart-rate zones from your estimated max heart rate so you can target the right intens...
Pace, splits, and goal times talk about the same thing from three different angles. A short guide to keeping them straight mid-race.