Free fitness tools and calculators
Quick, ad-free calculators built by the Fitly team. Use them on their own, or save your numbers to a Fitly account to track them over time.
Frequently asked questions
Yes. Every Fitly calculator is free to use, with no ads and no email gate. Create a free account to save your numbers and track them over time.
Our 1RM calculator uses the Epley and Brzycki formulas, the TDEE and calorie calculators use the Mifflin-St Jeor BMR equation with an activity multiplier, the BMI calculator follows the WHO category bands, and the macro calculator splits your calorie target into protein, carbs, and fat based on your goal.
Yes — sign in or create a free Fitly account and save your 1RM, TDEE, BMI, calorie, and macro results to your profile so you can revisit them as your training and nutrition change.
No. These calculators provide informational estimates only and are not a substitute for advice from a qualified physician, registered dietitian, or certified coach.
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