Free Calculators For Lifters, Coaches& Gyms
High-precision workout, nutrition, endurance, and gym business calculators. No paywalls, no email gates, and no nonsense.
HYROX Race Time & Pacing Calculator
Predict your total HYROX race finish time, station split times, Roxzone transitions, and official weights for Open, Pro, and Doubles.
1RM & Strength Calculator
Find your maximum 1-rep lift (1RM) and see exact weights to lift for building muscle, raw strength, or endurance in your workout sets.
Daily Calories & Macro Calculator
Find how many calories you burn per day and get exact daily protein, carbohydrate, and healthy fat targets for weight loss or muscle gain.
Zone 2 & HYROX Heart Rate Pacing
Find your fat-burning Zone 2 heart rate and calculate 5 stamina pacing zones using your age and resting heart rate.
U.S. Navy Body Fat Calculator
Estimate your body fat percentage and lean muscle mass using simple tape measurements (neck, waist, and hips).
Olympic Barbell Plate Loader
Visual diagram showing exactly which weight plates to load on each side of the barbell for any target weight in KG or LBS.
IPF DOTS Powerlifting Score
Calculate your official powerlifting score to compare your strength pound-for-pound across different bodyweights.
Personal Trainer Income Calculator
Calculate monthly trainer income, client capacity, and revenue lost to missed sessions in Indian Rupees (₹) or USD ($).
Gym Member Churn & LTV Calculator
Find member lifetime value (LTV), monthly dropout loss, and how much money your gym saves by improving retention.
Fitness Tools & Calculators FAQ
Everything you need to know about our evidence-based athletic calculators and formulas.
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FitSchool combines strength tracking, macro calculations, and coach periodization in a single app.