Health Calculators
Calculators for tracking health and fitness — BMI, calories, body fat, and pace.
Number of Calculators: 21
- Body Mass Index (BMI)Calculate your Body Mass Index (BMI), weight category, healthy weight range, BMI Prime, and Ponderal Index.
- Pregnancy Due DateEstimate your due date and how far along you are, from your last period, conception date, or IVF transfer date.
- Pregnancy Weight GainFind your recommended total pregnancy weight gain range based on your pre-pregnancy BMI, using the IOM guidelines.
- Calorie / TDEEEstimate your Total Daily Energy Expenditure (TDEE) and calorie targets for weight loss (at three paces) or gain, with a choice of BMR formula.
- Body Fat PercentageEstimate your body fat percentage from height, neck, waist, and hip measurements using the U.S. Navy Circumference Method.
- Army Body FatEstimate your body fat percentage using the U.S. Army's circumference-based body composition standard (AR 600-9).
- Running PaceFind your running pace, finish time, or distance — solve for whichever one you don't already know.
- Target Heart RateFind your target heart rate zones for exercise based on your age and resting heart rate.
- One-Rep-MaxEstimate the heaviest weight you could lift for one rep, from a weight and rep count you've already lifted.
- GFR / eGFREstimate your kidney function (eGFR) from a serum creatinine blood test result using the 2021 CKD-EPI race-free equation.
- OvulationEstimate your ovulation date, fertile window, and next expected period from the first day of your last period and your average cycle length.
- MacroSplit a daily calorie target into protein, carb, and fat grams using a common diet-style split (balanced, low-carb, high-protein, keto) or your own custom percentages.
- Ideal WeightEstimate a reference body weight from your height and gender using four published formulas (Devine, Robinson, Miller, and Hamwi) plus their average.
- Calories BurnedEstimate calories burned during exercise from the activity, your body weight, and how long you did it, using standard MET values.
- Blood Alcohol Content (BAC)Estimate blood alcohol content from the number of standard drinks, body weight, biological gender, and time elapsed, using the Widmark formula.
- Lean Body MassEstimate your lean body mass (weight minus fat mass) from height, weight, and gender using three published formulas (Boer, James, and Hume) plus their average.
- Body Surface AreaEstimate your body surface area (BSA) from height and weight using three published formulas (DuBois, Mosteller, and Haycock) plus their average.
- Body Frame SizeEstimate your skeletal body frame size (small, medium, or large) from your height-to-wrist-circumference ratio.
- Waist-to-Hip RatioFind your waist-to-hip ratio and where it falls on the World Health Organization's health-risk scale.
- Average Height ComparisonSee how your height compares to the average for your age and gender.
- Child Height PredictorEstimate a child's likely adult height from both parents' heights using the mid-parental height method.