About Health Calculators
Our purpose
Health Calculators is built so that anyone can check their health numbers easily and safely. With no app to install, no cost, and no privacy worries, you can run the health calculations you reach for every day — BMI, basal metabolic rate, due date and more — right in your browser.
Key features
100% private
Your inputs are never sent to a server. Every calculation happens only in your browser.
Instant results
Enter your values and results appear instantly, with no server round-trip. There is nothing to wait for.
Completely free
Use every calculator for free, with no sign-up and no usage limits.
🔒 Your information stays safe
No server transmission
Every feature of Health Calculators is processed 100% in your browser. Inputs like height, weight, and menstrual cycle are never sent to our servers.
How is this possible?
All the calculation formulas are built into your browser as JavaScript, so your inputs are computed instantly on your device without ever being sent anywhere.
No data retention
Your inputs exist only temporarily in browser memory, and all data is automatically deleted the moment you close or refresh the page.
Calculators we offer
- BMI Calculator: Find your body mass index and weight category from your height and weight
- Ideal & Standard Weight: Calculate your standard weight and healthy weight range from your height
- BMR & TDEE: Compute your BMR and recommended calories by activity using the Mifflin-St Jeor equation
- Body Fat %: Estimate body fat percentage from BMI, age, and sex
- Calories Burned: Calculate calories burned by exercise using a METs intensity table
- Due Date: Estimate your delivery date and pregnancy week from your last period
- Ovulation & Fertile Window: Predict ovulation and the fertile window from your cycle
- Daily Water Intake: Calculate your daily water target from weight and activity
- Alcohol Calories & BAC: Estimate the calories and blood alcohol concentration from the drinks you have had
Things to keep in mind
The results on this site are reference estimates based on widely-known standard formulas. Your actual health depends on many individual factors, so please always consult a medical professional for an accurate diagnosis or prescription.
Contact
If you have questions or suggestions about Health Calculators, please reach out through our contact page.