100 in Decimal
Binary 100 equals 4 in decimal.
100 in all number bases
Decimal4
Hexadecimal0x4
Binary0100
Octal4
Try another value
Edit this value or switch its base. Your changes are calculated in your browser with exact integer arithmetic.
Input base:
Decimal
4Hex
0x4Binary
0b100Octal
0o4How 100 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× 22 = 1 × 4 = 4
0× 21 = 0 × 2 = 0
0× 20 = 0 × 1 = 0
Sum: 4
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