Number Base Converter

Free online Number Base Converter.

Calculator

How to Use

  1. Enter the required values
  2. Click Calculate to see the result
  3. Review the detailed output

Formula

Decimal to base B: repeatedly divide by B, collect remainders. Binary(2), Octal(8), Decimal(10), Hex(16). Each digit position = B^position value.

Example Calculations

Decimal to Binary

Input: Decimal: 42

Result: Binary: 101010

Hex to Decimal

Input: Hexadecimal: 0xFF

Result: Decimal: 255

Binary to Hex

Input: Binary: 11110000

Result: Hex: F0, Decimal: 240

About This Calculator

Free online number base converter. Calculate instantly in your browser with our easy-to-use tool. No sign-up required.

Our number base converter is free, easy to use, and provides instant results. All calculations are performed in your browser for privacy and speed.

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Frequently Asked Questions

What are number bases?

Binary (2): 0-1. Octal (8): 0-7. Decimal (10): 0-9. Hexadecimal (16): 0-9, A-F.

Binary to decimal?

Multiply each digit by 2^position, sum. 1011 = 8+0+2+1 = 11.

Why computers use binary?

Circuits have two states: on/off. Binary is reliable, simple in hardware, resistant to degradation.

Hex to decimal?

Multiply each digit by 16^position, sum. 0x1A3 = 256+160+3 = 419.

What is base64?

Encoding using 64 ASCII characters to represent binary data for text-based transmission.