Everyday utility

Binary Calculator

Convert decimal numbers to binary, hexadecimal, or octal. Use this Data and utilities tool to enter your numbers, review the result, and understand the key assumptions before making the next decision.

What you get
A focused calculator, clear explanation, common questions, and useful next tools.
Quick intro
Calculator
Result
Explanation
Common questions
Related tools

Calculator tool

How this calculator works
The result depends on the numbers you enter and the assumptions shown below.

Enter a non-negative decimal integer and select a target base. Binary (base 2) uses only 0s and 1s. Hexadecimal (base 16) uses 0–9 and A–F. Octal (base 8) uses 0–7. The calculator also shows the number of bits for binary outputs.

Review the inputs carefully and treat the output as an estimate. For decisions involving money, taxes, health, law, or security, compare the result with trusted professional guidance when needed.

Frequently asked questions

Why are binary and hex commonly used in computing?

Computers store data in binary (base 2). Hexadecimal is a compact way to represent binary — each hex digit corresponds to exactly 4 bits.

What is the maximum input?

JavaScript integers are safe up to 2^53 − 1. Very large numbers may lose precision.