Health & Fitness Calculators
Track your health metrics, calculate calories, BMI, and plan your fitness journey.
Calorie Calculator (TDEE)
Calculate your Total Daily Energy Expenditure (TDEE) and find out exactly how many calories you need to eat to lose, maintain, or gain weight.
Open Tool →Pregnancy Due Date Calculator
Estimate your pregnancy due date based on the first day of your last menstrual period (LMP) or conception date. Provides a timeline of trimesters.
Open Tool →BMI Calculator
Calculate body mass index from height and weight, then view the adult BMI category and a height-based healthy-weight range.
Open Tool →Water Intake Calculator
Estimate daily water intake from body weight, activity, climate, and pregnancy or breastfeeding adjustments.
Open Tool →Ovulation Calculator
Estimate ovulation, fertile-window dates, the next period, and a calculated due date from the last period start and cycle length.
Open Tool →Body Fat Calculator
Estimate body-fat percentage, category, fat mass, and lean mass from sex, height, waist, neck, hips, and body weight using the US Navy method.
Open Tool →Ideal Weight Calculator
Estimate a height-based healthy weight range using adult BMI boundaries and the selected unit system.
Open Tool →BMR Calculator (Basal Metabolic Rate)
Calculate your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE) based on your age, gender, height, and weight.
Open Tool →Macro Calculator
Estimate daily calories and macronutrient grams from body measurements, activity, goal, and macro split assumptions.
Open Tool →Protein Calculator
Estimate a daily protein range from body weight, activity level, and a maintenance, muscle-gain, or fat-loss goal.
Open Tool →Sleep Calculator
Estimate sleep or wake times from 90-minute cycle assumptions and an adjustable fall-asleep duration.
Open Tool →Pace Calculator
Calculate running pace, finish time, or distance for training and races. Determine exact splits for a marathon, half-marathon, 10k, or 5k.
Open Tool →Ideal Body Weight Calculator
Estimate ideal body weight using the Devine, Robinson, Miller, and Hamwi height-based equations.
Open Tool →Macronutrient Calculator
Estimate daily calories and protein, carbohydrate, and fat targets from body data, activity, and goal assumptions.
Open Tool →Period Ovulation Calculator
Estimate period dates, ovulation, fertile-window timing, and cycle length from a last-period date and average cycle length.
Open Tool →FFMI Calculator
Estimate fat-free mass index from height, weight, and body-fat percentage, with normalized FFMI where supported.
Open Tool →Iifym Calculator
Estimate daily calories and macro targets using an If It Fits Your Macros approach based on body data, activity, and goal.
Open Tool →Pregnancy Weight Gain Calculator
Estimate recommended pregnancy weight-gain ranges from pre-pregnancy BMI and current pregnancy week.
Open Tool →Calorie Tdee Calculator
Calculate your Total Daily Energy Expenditure (TDEE) and target daily calories for fat loss, maintenance, or muscle gain using the Mifflin-St Jeor formula.
Open Tool →how to calculate bmi correctly
Article on how to calculate bmi correctly.
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