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1101 in Decimal

Binary 1101 equals 13 in decimal.

1101 in all number bases

Decimal13
Hexadecimal0xD
Binary1101
Octal15

How 1101 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× 23 = 1 × 8 = 8
1× 22 = 1 × 4 = 4
0× 21 = 0 × 2 = 0
1× 20 = 1 × 1 = 1

Sum: 13