Free Health Calculators
Your health in numbers. Our health calculators use clinically validated formulas to help you understand your body, plan your lifestyle, and make informed wellness decisions. All calculations happen in your browser — no data is stored or shared.
Body Mass Index (BMI)
Total Daily Energy Expenditure (TDEE)
Sleep cycle optimization
Pregnancy due date estimation
Hash Generator
Generate cryptographic hashes from text using MD5, SHA-1, SHA-256, SHA-512 and more. Learn how hashing works for security and data integrity.
Open calculator →JSON Formatter & Validator
Format, validate, and minify JSON data online. Handles large payloads efficiently with syntax highlighting, error detection, and tree view — all processed locally in your browser.
Open calculator →JavaScript Formatter & Validator
Format, validate, and minify JavaScript code online. Detects syntax errors instantly with clear error messages — all processed locally in your browser for speed and privacy.
Open calculator →