Sports & Fitness Tools & Calculators
Free, practical tools for every athlete — dial in your running pace, estimate your one-rep max, train by heart rate, check your body composition, plan your hydration, and count the calories you burn.
Running Pace Calculator
Turn a distance and finishing time into your pace per kilometre and per mile, plus average speed in km/h and mph — plan training runs and pace your next race with confidence
One-Rep Max Calculator
Estimate your one-rep max from a submaximal set with the Epley and Brzycki formulas, and get a percentage table for loading every set — no risky true-max attempts required
Heart Rate Zone Calculator
Find your maximum heart rate and five training zones from your age, with optional Karvonen zones when you add a resting heart rate — so every session hits the intensity you intend
BMI & Body Fat Calculator
Calculate your Body Mass Index and category plus an estimated body-fat percentage from the Deurenberg equation, using your weight, height, age, and sex — a quick body-composition snapshot
Sports Hydration Calculator
Estimate your daily fluid target — a bodyweight baseline plus fluid to replace the sweat you lose training, scaled by intensity, in millilitres and litres so you train well hydrated
Calorie Burn Calculator
Estimate the calories you burn using the MET model — pick a sport, enter your bodyweight and duration, and see total calories and calories per minute to balance training with nutrition