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Binary to Decimal Converter

What is this tool?

A focused, single-purpose converter between base-2 (binary) and base-10 (decimal) numbers, built on exact BigInt math so it stays accurate even for very large numbers. Type a value, tap the swap arrow to flip direction, and read the result instantly.

When to use it

  • Converting a binary value from a programming or networking context to a human-readable decimal number
  • Checking a binary homework or exam answer
  • Converting a decimal number to binary for low-level programming, IP subnetting or bitwise logic
  • Understanding how a specific number is represented in base-2

How to use it

  1. 1Type a binary number (0s and 1s) into the input field
  2. 2Read the decimal equivalent instantly in the result card
  3. 3Tap the swap arrow to flip the conversion to decimal → binary instead
  4. 4Use the copy icon to copy the result

Frequently asked questions

What is 1010 in decimal?

Binary 1010 equals decimal 10.

Is there a limit to how large a number I can convert?

No practical limit — the conversion uses BigInt math, so very large binary or decimal numbers stay exact.

Can I convert decimal to binary here too?

Yes — tap the swap arrow next to the input to flip the direction.

Does this tool need an internet connection after loading?

No, the conversion runs entirely in your browser.