Skip to content

1 in Decimal

Binary 1 equals 1 in decimal.

1 in all number bases

Decimal1
Hexadecimal0x1
Binary0001
Octal1

Try another value

Edit this value or switch its base. Your changes are calculated in your browser with exact integer arithmetic.

Input base:
Decimal1
Hex0x1
Binary0b1
Octal0o1

How 1 converts from binary to decimal

Multiply each digit by 2 raised to its position (starting at 0 from the right), then add the results:

1× 20 = 1 × 1 = 1

Sum: 1

This tool runs entirely in your browser - nothing you enter is uploaded or stored.

Want to learn the method behind this tool? Read How to Convert Binary to Decimal - the full step-by-step guide.