Free body calculators
Quick answers to the questions people ask about their bodies: how much fat, how much muscle, how much protein, how many calories. Every tool shows its formula, its limits and its sources.
Body fat calculatorEstimate your body fat percentage with a tape measure — Navy or one-site Army method.Open →Body fat percentage picturesSee what different body fat levels look like for men and women, side by side.Open →Protein calculatorHow much protein you need per day and per meal, for your goal and activity.Open →FFMI calculatorFat-free mass index and lean body mass — a better muscle measure than BMI.Open →Waist-to-height ratio calculatorIs your waist less than half your height? The simple check guidelines now use.Open →Calorie deficit calculatorYour maintenance calories (TDEE) and a sensible deficit, with safe minimums.Open →
Trainr is a wellness tool, not a medical device. These calculators give estimates for self-tracking, not a diagnosis. For medical questions, talk to a professional.