Free · No signup required

Fitness Calculators

Science-backed tools for training and nutrition. Get a result in under a minute.

Protein Intake Calculator
How many grams of protein you need per day based on your weight, goal, and activity level.
Try it →
Body Fat Estimator
Estimate body fat % using the U.S. Navy circumference method — tape measure only, no calipers.
Try it →
Alcohol Recovery Calculator
Estimated BAC, workout readiness score (0–100), and hours until you're safe to train.
Try it →
Bench Press Percentile
See how your bench press compares by age and sex. Includes 1RM estimate, strength tier, and next milestone.
Try it →

Track your results in FitMagic

Log workouts, nutrition, and body stats — and let your AI coach build a plan around the numbers.

Start Free Trial