Free tools
Free fitness calculators
Five quick calculators for the numbers lifters actually ask about. They run in your browser, need no account and keep nothing you type.
One-rep max calculator
Estimate your 1RM from any set, plus training loads from 50% to 95%.Calorie calculator (TDEE)
Your maintenance calories plus targets for cutting and bulking.Macro calculator
Protein, fat and carbs in grams for your goal.Body fat calculator
Estimate body fat with a tape measure (US Navy method).Plate calculator
Which plates to load on each side of the bar.Turn the number into a plan
GymiaFit logs every set, tracks your lifts, macros and body measurements over time, and builds your next workout with an AI coach. Free, no ads, no paywall.