Tools

Free fitness calculators

Five free calculators that use the exact formulas inside the Kynetix app: daily calories, protein, macros, one rep max and BMI. Nothing is sent anywhere; the maths runs in your browser.

Calorie calculatorYour daily calories start from your BMR (Mifflin-St Jeor), multiplied by an activity factor for how often you...
Protein calculatorMost people who lift do well on 1.7 to 2.2 g of protein per kg a day: the top of that range while losing fat,...
Macro calculatorSet protein first from your weight and goal, give fat 30% of the remaining calories (never under 0.6 g per...
One rep max calculatorYour estimated one rep max is the weight times one plus the reps divided by 30 (the Epley formula). It is...
BMI calculatorBMI is your weight in kg divided by your height in metres squared. For Asian adults, including Indians, a WHO...