Your Health, Measured Clearly
Free online health calculators for BMI, calories, body fat, pregnancy due date, hydration & more. No sign-up, no fees, just answers.
Health Calculators
BMI Calculator
Calculate your Body Mass Index from weight and height. Get instant category breakdown.
TDEE Calculator
Find your Total Daily Energy Expenditure — how many calories you burn every day.
Calorie Calculator
Set your goal weight and timeline, and get your daily calorie target instantly.
Body Fat Calculator
Estimate your body fat percentage using the US Navy circumference method.
Pregnancy Due Date
Find your estimated due date based on the first day of your last period.
Water Intake Calculator
Find your optimal daily hydration goal based on body weight and activity level.
Health Guides
How to Calculate BMI & What It Means
The complete guide to BMI — formula, categories, limitations, and better alternatives.
Read Guide → Free GuideTDEE Explained: Your Daily Calorie Burn
Understand TDEE, BMR, activity multipliers, and how to use them for your goals.
Read Guide → Free GuideThe Ultimate Calorie Counting Guide
How to count calories effectively, sustainably, and without losing your mind.
Read Guide → Free GuideBody Fat Percentage: What's Normal?
Healthy ranges by age and sex, how to measure, and why it beats BMI for body composition.
Read Guide → Free GuidePregnancy Due Date: How It Works
Understand Naegele's rule, trimester milestones, and how due dates are confirmed.
Read Guide → Free GuideHow Much Water Should You Drink?
Science-based hydration needs by body weight, activity, and climate — plus practical tips.
Read Guide →Why HealthCalc?
💚 100% Free Forever
No premium tiers, no hidden fees, no subscriptions. Every calculator works without creating an account.
⚡ Instant Results
Get accurate calculations in seconds. No loading, no waiting, no forms to fill out.
📱 Mobile Friendly
Works perfectly on any device. Calculate on your phone, tablet, or desktop.
🔐 Private & Secure
All calculations happen in your browser. Your data never leaves your device.
Start Tracking Your Health Today
Whether you're managing weight, planning a pregnancy, or just curious about your health numbers — HealthCalc has a free tool for you.
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