Updated
Math
Big Number Calculator
Work with extremely large integers without overflow: exact arithmetic, base conversion, comparisons, GCD/LCM, powers, factorial, and modular exponentiation.
Huge Integer Math & Base Converter
Add, subtract, multiply, divide (with remainder), compare, convert bases, and run advanced integer functions with step-by-step explanations.
This calculator is designed for big integers. If you need high-precision decimals (fractions), use an arbitrary-precision decimal calculator instead.
Auto mode recognizes prefixes: 0x (hex), 0b (binary), 0o (octal). Otherwise it treats the input as decimal.
Heavy operations (factorial, large exponents, primality tests) may be capped to keep the page responsive. For research-scale computations, use a dedicated math library.