Health & Fitness Calculators

Estimate the time it will take for your BAC to drop to a safe level.

Free online Army body fat calculator. Estimate your body fat percentage using the official U.S. Army tape test method (neck, waist, hip measurements).

Calculate riding speed.

Predict the probability of the baby's eye color based on the parent's eye color.

Estimate your Blood Alcohol Content (BAC) based on what you drank, your weight, and time passed.

Estimate your 1 Rep Max for bench press.

Calculate your bicycle gear inches.

Calculate your current physical, emotional and intellectual body clock cycles.

When can you donate blood next?

Convert mg/dL to mmol/L and back.

Check that your blood pressure readings are within a healthy range.

Convert blood glucose levels between mg/dL and mmol/L.

Predicting the likely blood types of the next generation.

Estimate blood volume (Nadler).

Calculate your Body Mass Index (BMI) instantly. Our zero-click calculator supports both metric and imperial measurements to help you check your healthy weight.

Calculate your BMI Prime ratio.

Quickly estimate basal metabolic rate.

Calculate Basal Metabolic Rate.

Calculate BAI.

Calculate your body fat percentage instantly using the highly accurate US Navy Tape Measure method.

Calculate body surface area (Mosteller's formula).

Calculate your bowling handicap for leagues.

Calculate your perfect bowling score based on frames.

Calculate how fast you roll your bowling ball.

Calculate your Body Surface Area (BSA) using the DuBois, Mosteller, or Haycock formulas.

Calculate the amount of caffeine remaining in your body.

Calculate exactly how many calories you need to maintain, lose, or gain weight. Based on the scientifically proven Mifflin-St Jeor equation.

Calculate weight loss timeline.

Free online calories burned calculator. Find out exactly how many calories you burn during running, walking, and other activities.

Macronutrients for planning high-carb vs. low-carb days.

Daily carbohydrate needs.

Calculate the probability of winning a chess match based on ELO difference.

Predict your future child's possible blood types based on the parents' blood types.

Predict the future height of the child based on the height of the parents.

Assess the growth and development of children and adolescents.

Calculate your Total to HDL cholesterol ratio.

Calculate the probable date of conception based on your due date.

Calculate calories burned while cycling.

Calculate the calories needed to maintain your current weight.

Free online water intake calculator. Find out exactly how much water you should drink daily based on your weight, exercise, and climate.

Calculate your darts checkout score.

Evaluate the risk of eating chocolate.

Estimate due date from LMP.

Calculate due date from last menstrual period.

Calculate new ELO ratings after a match between two players.

Convert glycosylated hemoglobin (A1C) to estimated average blood glucose.

Calculate FFMI.

Daily fat needs.

Assess whether muscle mass has reached genetic limits.

Estimate glomerular filtration rate.

A1C to eAG.

Calculate the weight required to reach your target body fat based on your current body fat percentage.

Calculate your estimated golf handicap index.

Calculate how much water you should drink daily.

Evaluate whether your body fat percentage is within the ideal range.

Devine formula for ideal weight (male approx).

Calculate your eating and fasting windows based on your preferred IF schedule.

Predict ovulation for irregular menstruation.

Calculate the expected date of delivery based on the IVF transplant date.

Calculate calories burned while jumping rope.

Calculate your exact daily macros (fat, protein, carbs) for the ketogenic diet based on your goals.

Calculate LDL cholesterol (Friedewald).

Calculate LBM.

Calculate lean body mass (Boer formula).

Free online macronutrient calculator. Find your ideal protein, carb, and fat intake based on your fitness goals.

Predict your marathon finish time based on your average pace.

Calculate maximum heart rate.

Epley formula for 1RM.

Calculate your most fertile days and ovulation date.

Estimate your next period and fertile window.

Measure of leanness.

Calculate your estimated due date, current timeline, and remaining days until birth using your last menstrual period.

Calculate the recommended healthy weight gain range during pregnancy based on your pre-pregnancy BMI.

Calculate your daily protein requirements based on your goals.

Daily protein requirement.

Calculate your running pace per kilometer.

Free online running pace calculator. Enter your distance and time to instantly calculate your pace per mile or kilometer.

Calculate the best time to wake up or go to bed.

Find out when to wake up or go to sleep to feel refreshed.

Convert your step count to miles and kilometers based on your height and stride length.

Calculate your swimming pace per 100m.

Calculate calories burned by swimming.

Calculate target heart rate for exercise.

Free online target heart rate calculator. Calculate your maximum heart rate and ideal training zones for fat burn and cardio.

Calculate Total Daily Energy Expenditure.

Calculate a player's True Shooting Percentage (TS%).

Assess kidney health.

Estimate aerobic capacity (Cooper test).

Measure body fat distribution.

Assess health risk from body shape.

Calculate calories burned while walking based on weight and distance.

Estimate the calories burned by walking.

Daily water intake based on weight.

Free online Wilks score calculator. Compare relative strength across different weight classes in powerlifting using the standard formula.

Powerlifting pound-for-pound metric (approx).

Calculate the calories burned doing yoga.

Free online 1RM calculator. Estimate your one-rep max and generate weightlifting percentage charts safely.