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Health & Fitness Calculators

BMI, calories, macros, heart rate, and wellness metrics.

A1C to Blood Sugar Converter

Convert your A1C percentage to estimated average blood sugar.

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Blood Pressure Category Calculator

Classify your blood pressure reading against ACC/AHA 2017 guidelines.

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Health

BMI & Body Health

Compute Body Mass Index with Metric & Imperial units and target healthy weight guides.

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BMR & Calorie Baseline

Estimate daily calorie needs using age, height, weight, and sex.

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Body Fat Percentage Calculator

Estimate body fat percentage with the U.S. Navy tape method.

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Body Frame Size Calculator

Classify your body frame as small, medium, or large.

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Body Surface Area Calculator

Estimate body surface area using the Mosteller formula.

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Body Type Calculator

Classify your body type as ectomorph, mesomorph, or endomorph.

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Caffeine Intake Limit Calculator

Find your daily caffeine limit based on weight.

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Calorie Deficit Calculator

Calculate how long to reach goal weight at a given daily deficit.

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Calories Burned Calculator

Estimate calories burned during exercise using MET values.

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Carb Intake Calculator

Set daily carbohydrate targets by body weight and activity.

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Pregnancy

Conception Date Calculator

Work backwards from a due date or last period to the most likely conception date and intercourse window.

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Dog Age Calculator

Convert dog years to human years with the modern DNA formula.

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Pregnancy

Pregnancy Due Date Calculator

Estimate your due date from your last period or conception date, with gestational age and trimester.

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Daily Fat Intake Calculator

Estimate how much dietary fat you need each day.

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Ideal Body Fat Percentage Calculator

Find the ideal body fat range for your age and sex.

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Ideal Weight Calculator

Estimate a healthy target weight using the Devine formula.

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Lipids

LDL Cholesterol Calculator

Estimate LDL cholesterol with the Friedewald equation and see non-HDL and cholesterol ratios.

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Lean Body Mass Calculator

Estimate your lean body mass excluding fat using the Boer formula.

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Complete Macro Calculator

Split daily calories into protein, carbs, and fat targets.

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Weight Maintenance Calories Calculator

Find the exact calories needed to stay at your current weight.

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Vitals

Mean Arterial Pressure Calculator

Calculate mean arterial pressure and pulse pressure from systolic and diastolic readings.

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Metabolic Age Calculator

Compare your BMR to population averages for your age group.

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Fertility

Ovulation & Fertile Window Calculator

Predict ovulation, your six-day fertile window, and the next three cycles from your last period.

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Respiratory

Pack Years Calculator

Convert cigarettes per day and years smoked into pack-years and total cigarettes.

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Veterinary estimate

Pet Calorie Calculator

Estimate resting and daily calorie needs for a dog or cat from weight and life stage.

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Pregnancy

Pregnancy Week Calculator

See how many weeks and days pregnant you are, the trimester, fetal age, and your next antenatal milestone.

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Protein Intake Calculator

Set daily protein targets by body weight and goal.

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Running Calorie Calculator

Estimate calories burned during a run by pace and duration.

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Wellness

Sleep Cycle Calculator

Find the best bedtime or wake-up time based on 90-minute sleep cycles.

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Sleep Debt Calculator

Track cumulative sleep deficit and recovery needs.

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Fitness

Steps to Miles & Calories

Convert step count to distance in miles and kilometers, and estimate calories burned walking.

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Target Heart Rate Calculator

Find your cardio training zones by age and resting heart rate.

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Nutrition

TDEE & Calorie Calculator

Calculate your Total Daily Energy Expenditure and find the right calorie target for weight loss or muscle gain.

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VO2 Max Estimator

Estimate your VO2 max from a recent run time.

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Waist-to-Height Ratio Calculator

Determine if your waist is too large for your height.

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Waist-to-Hip Ratio Calculator

Assess body fat distribution and health risk using waist and hip measurements.

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Daily Water Intake Calculator

Estimate how much water you should drink each day.

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