🔢 Health Calculators 📰 Health Articles ℹ️ About WellCalc ✉️ Contact Us
Updated January 2026

Know Your Body.
Live Better.
Feel Great.

Free, science-backed health calculators and expert wellness guides — trusted by readers across the USA, UK, Canada, Australia, and New Zealand.

24
Free Tools
155+
Expert Articles
100%
Free Forever
0
Sign-ups
⚡ Quick BMI Check
Body Mass Index
kg
cm
Free Calculators

24 Health Tools — All Free

Clinically validated formulas. Results in seconds. No sign-up needed.

⚖️
🔥 Most Popular
BMI Calculator
Calculate your Body Mass Index. WHO health categories with personalised advice.
🏋️
⭐ Popular
Ideal Weight Calculator
Find your healthy weight range using 5 proven medical formulas.
💪
Body Fat % Calculator
Estimate body fat using the US Navy method. Get fat mass and lean mass.
📐
Waist-to-Hip Ratio
Calculate WHR and body shape. Check cardiovascular risk per WHO guidelines.
🦴
Body Frame Size
Determine if you have a small, medium, or large body frame using wrist measurement.
🎂
⭐ Popular
Age Calculator
Exact age in years, months, days. Birthday countdown and age difference.
🔥
🔥 Top Search
Calorie (TDEE) Calculator
Find your Total Daily Energy Expenditure. Calories to lose, maintain, or gain.
🥩
Protein Intake Calculator
Daily protein needs for muscle building, weight loss, or general health.
💧
Water Intake Calculator
Daily hydration needs based on weight, activity level, and climate.
📊
✨ New
Macro Calculator
Perfect daily protein, carbs, and fat split for your body and goals.
📉
✨ New
Calorie Deficit Calculator
How many calories to eat to reach your goal weight by your target date.
🧬
BMR Calculator
Basal Metabolic Rate using 4 formulas: Mifflin, Harris-Benedict, Schofield, Katch.
❤️
⭐ Popular
Heart Rate Zones
5 training zones for fat burn, cardio, and peak performance. Karvonen formula.
🏃
Running Pace Calculator
Pace, finish time, or distance. Race predictions for 5K, 10K, half, full marathon.
👟
Steps to Calories
Convert daily steps to calories, distance, and miles walked.
😴
⭐ Popular
Sleep Cycle Calculator
Best time to wake up using 90-minute sleep cycles. Wake refreshed, not groggy.
🤰
🔥 Top Search
Pregnancy Due Date
Due date from LMP, conception date, or IVF transfer. Track trimesters.
🌸
⭐ Popular
Ovulation Calculator
Fertile window and ovulation date with 3-month cycle forecast.
👶
Child Height Predictor
Predict your child's adult height from parents' heights. Mid-Parental formula.
🩺
✨ New
Blood Pressure Checker
Normal, elevated, or high? Instant check based on AHA guidelines.
🩸
Blood Sugar Converter
Convert mg/dL ↔ mmol/L instantly. Includes HbA1c converter and normal range chart.
📋
✨ New
Diabetes Risk Score
Validated FINDRISC questionnaire. Assess 10-year Type 2 diabetes risk in 2 minutes.
☀️
✨ New
Vitamin D Calculator
Deficiency risk based on location, skin tone, and sun exposure. Dosage guide.
🍷
Alcohol Unit Calculator
Units in any drink. Weekly limit checker per NHS & WHO guidelines.
Browse by Category

Everything You Need

⚖️
Weight & Body
6 tools
🥗
Nutrition
6 tools
🏃
Fitness
4 tools
🌸
Women's Health
3 tools
❤️
Health Checks
5 tools
Health Guides

Expert Articles — Updated 2026

Science-backed health guides reviewed by qualified medical professionals.

View all articles →
🔬
Science-Based
Every formula sourced from peer-reviewed research and WHO, AHA, NHS guidelines
🔒
100% Private
All calculations run in your browser. We never store or transmit your health data
⚕️
Medically Reviewed
All articles reviewed by qualified MDs, RDs, and specialist healthcare professionals
💰
Free Forever
No premium tier, no subscriptions. Every tool and article is completely free
Free Newsletter

Weekly Health Guides,
Straight to Your Inbox

Evidence-based health tips, new calculator announcements, and expert wellness guides — delivered free every Tuesday. No spam, ever.

🔒 No spam. Unsubscribe anytime. Read by 12,000+ health-conscious readers.