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Calculators / Health

Track Your Health

24 evidence-based health calculators for BMI, calories, macros, hydration, pregnancy, fitness, and more.

24 free tools No sign-up · Instant results · 100% free

All Health Calculators (24 tools)

Health

BMI Calculator

Body Mass Index calculator with healthy weight ranges and visual feedback.

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Health

Calorie Calculator

Daily calorie needs (TDEE) based on age, weight, height and activity level.

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Health

Body Fat Calculator

Estimate body fat percentage using the U.S. Navy method with measurements.

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Health

BMR Calculator

Calculate Basal Metabolic Rate — calories your body burns at complete rest.

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Health

Water Intake Calculator

Calculate your recommended daily water intake based on weight, activity, and climate.

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Health

Ideal Weight Calculator

Calculate your ideal body weight using Devine, Robinson, Miller, and Hamwi formulas.

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Health

Pregnancy Due Date Calculator

Calculate your estimated due date, conception date, and current trimester.

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Health

Sleep Calculator

Calculate optimal bedtime or wake-up time based on 90-minute sleep cycles.

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Health

Calorie Deficit Calculator

Calculate your calorie deficit for weight loss with weekly fat loss projections.

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Health

Ovulation Calculator

Estimate your ovulation day, fertile window, and best days to conceive.

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Health

Macro Calculator

Calculate daily protein, fat, and carb targets based on your fitness goals.

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Health

Protein Intake Calculator

Calculate your daily protein needs based on weight, activity, and goals.

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Health

Steps to Calories Calculator

Convert steps walked into calories burned, distance, and time spent.

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Health

Heart Rate Zone Calculator

Calculate your 5 heart rate training zones for fat burn, cardio, and peak.

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Health

One Rep Max Calculator

Calculate your one-rep max using Brzycki, Epley, and Lombardi formulas.

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Health

Alcohol Units Calculator

Calculate alcohol units consumed and compare against weekly guidelines.

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Health

Period Calculator

Predict your next period, fertile window, and ovulation date.

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Health

Running Pace Calculator

Calculate running pace, finish time, and splits for any distance.

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Health

Calories Burned Calculator

Calculate calories burned for 30+ activities based on weight and duration.

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Health

TDEE Calculator

Calculate your Total Daily Energy Expenditure (TDEE) for fat loss or muscle gain.

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Health

Pregnancy Weight Gain Calculator

Track healthy pregnancy weight gain based on your pre-pregnancy BMI.

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Health

Conception Date Calculator

Estimate your exact conception date based on your ultrasound or due date.

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Health

BAC Calculator

Estimate your Blood Alcohol Content (BAC) based on weight and drinks consumed.

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Health

VO2 Max Calculator

Calculate your cardiovascular fitness level and VO2 Max estimate.

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Explore Other Categories

Discover more free tools across all our calculator categories.

Frequently Asked Questions

How accurate is the BMI calculator?
BMI is a widely-used screening tool but not a perfect measure of health. It does not account for muscle mass or body composition. Always consult a healthcare professional for a full assessment.
What is TDEE and why does it matter?
TDEE (Total Daily Energy Expenditure) is the total number of calories you burn in a day. It is used to determine how much to eat for weight loss, maintenance, or muscle gain.
Which calculator should I use to lose weight?
Start with the TDEE Calculator to find your maintenance calories, then use the Calorie Deficit Calculator to plan your deficit, and the Macro Calculator to split protein, fat, and carbs.