BMI Calculator
Compute Body Mass Index from height and weight (metric or imperial). Educational use only — not medical advice.
Loading…
Use BMI Calculator Online Free
This free online bmi calculator runs in your browser. No installation, no signup. Paste your input above and get instant results. Works on desktop and mobile.
How BMI Calculator Works
Paste or enter your input in the field above. Most tools update in real time. Click the Copy button to copy the output. All processing happens in your browser—your data never leaves your device unless the tool explicitly uses a server feature (such as URL shortening or bcrypt hashing).
This tool is part of the Math Tools category. Check similar tools below. All everytools are free, no signup required. Works on desktop and mobile.
You might also like
Other Math Tools
Math Expression Calculator
Evaluate mathematical expressions: 2+3*4, sqrt(16), 2^10. Supports basic operations and common functions.
GCD & LCM Calculator
Calculate Greatest Common Divisor and Least Common Multiple of two or more numbers. Euclidean algorithm.
Prime Number Checker
Check if a number is prime. Find prime factors. Useful for cryptography and number theory.
Factorial Calculator
Calculate n! (factorial). Enter a non-negative integer. Used in permutations and combinations.
Number Base Converter
Convert numbers between binary, decimal, octal, and hexadecimal. For developers and programmers.
Quadratic Equation Solver
Solve ax² + bx + c = 0. Find roots, discriminant. Step-by-step solution for quadratic equations.
Roman Numeral Converter
Convert between decimal numbers and Roman numerals (I, V, X, L, C, D, M). For dates and classic notation.
Modulo Calculator
Calculate a mod b (remainder after division). Essential for modular arithmetic and programming.
Frequently Asked Questions
- How is BMI calculated?
- Metric: weight in kilograms divided by height in meters squared. Imperial: 703 × weight in pounds divided by height in inches squared.
- Is this a diagnosis?
- No. BMI is a simple population-level screen. Athletes and many individuals may have a healthy body composition outside typical BMI ranges. Ask a clinician for personal guidance.