Number Base Calculator
Free binary, hex, octal, and decimal calculator. Instant arithmetic, no sign-up.
Add, subtract, multiply, and divide in binary, octal, decimal, or hexadecimal.
Result (decimal)
0 + 0
0
To convert text to binary, hex, or octal (encoding), use the Text ⇄ Binary ⇄ Hex ⇄ Octal converter.
About the number base calculator
Free calculator for arithmetic in binary, octal, decimal, and hexadecimal. Choose a base, enter two numbers, and add, subtract, multiply, or divide. Results and remainder are shown in the same base. No sign-up required.
- Binary (base 2), octal (8), decimal (10), hex (16)
- Add, subtract, multiply, divide with remainder for division
- Copy result and reset
Use cases
- Programming and digital logic
- Computer science and math
- Quick base-N arithmetic
For converting text to binary, hex, or octal (encoding), use the Text ⇄ Binary ⇄ Hex ⇄ Octal converter.
Added Mar 4, 2026
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