Big Number Calculator
Add, subtract, multiply, divide or raise arbitrarily large integers with exact results — no overflow.
Runs 100% in your browser — nothing is uploaded.
Result
Formula
Exact integer arithmetic using arbitrary-precision arithmetic.
About this calculator
The Big Number Calculator performs arithmetic operations (addition, subtraction, multiplication, division, modulo, and exponentiation) on arbitrarily large integers, returning exact results without rounding or overflow. It also supports conversion between different number bases (binary, octal, decimal, hexadecimal, and custom bases up to
How to use
- 1
Enter the first integer in the 'First number' field.
- 2
Choose an operation (+, −, ×, ÷, mod, ^) from the 'Operation' dropdown.
- 3
Enter the second integer in the 'Second number' field and click Calculate.
Frequently asked questions
How large can the numbers be?
There is no practical limit; the calculator uses arbitrary-precision arithmetic, so it can handle numbers with thousands of digits.
Can I use negative numbers?
Yes, negative integers are accepted for addition, subtraction, multiplication, and division. For modulo, the sign of the result follows the dividend (Number A).
What happens if I divide by zero?
Division by zero is not allowed and will produce an error message.
Please note: Results are estimates for general information only and are not professional or medical/financial advice.