Free health and fitness tools
11 free health & fitness tools — instant, private, no sign-up
Blood Alcohol Concentration (BAC) Calculator
Estimate Blood Alcohol Content (BAC) based on the Widmark formula and calculate approximate time until sober.
Open tool →BMR TDEE Calculator
Calculate basal metabolic rate and daily calorie needs (TDEE).
Open tool →Calorie Deficit & Weight Loss Calculator
Calculate your Total Daily Energy Expenditure (TDEE) and exact daily calorie deficit target to lose fat safely.
Open tool →Heart Rate Zone Calculator
Calculate training heart-rate zones from your age.
Open tool →Macro Calculator
Split calories into protein, carbs, and fat macros.
Open tool →One Rep Max Calculator
Estimate your one-rep max from weight and reps.
Open tool →Ovulation Period Calculator
Estimate fertile window and next period from cycle data.
Open tool →Pregnancy Due Date & Trimester Calculator
Calculate your estimated delivery date (EDD), gestational age in weeks & days, and trimester milestones.
Open tool →Running Pace Calculator
Solve running pace, time, or distance.
Open tool →Sleep Calculator
Find ideal bedtime or wake times based on 90-minute sleep cycles.
Open tool →Water Intake Calculator
Estimate your daily hydration target from weight and activity.
Open tool →