Fitness Calculators
12 free, accurate fitness calculators — calories, body composition, strength and cardio. Each works in metric or US units and updates as you type.
TDEE CalculatorDaily calories to lose, maintain or gainBMR CalculatorCalories you burn at complete restBMI CalculatorBody Mass Index & categoryOne-Rep Max CalculatorEstimate your 1RM & training percentagesBody Fat % CalculatorBody fat % from tape measurementsCalories Burned CalculatorCalories burned by activityIdeal Weight CalculatorIdeal body weight for your heightHealthy Weight CalculatorHealthy weight range for your heightLean Body Mass CalculatorYour fat-free body massPace CalculatorRunning & walking paceHeart Rate Zones CalculatorTarget training heart-rate zonesArmy Body Fat CalculatorTape-test body fat vs standards
Every FORMA calculator uses a recognised, published formula — Mifflin–St Jeor for BMR and daily calories, Epley for one-rep max, the U.S. Navy method for body fat, Boer for lean mass and more. Pick a calculator above to run it and read how it works, with a worked example and answers to common questions.