1001 in Decimal
Binary 1001 equals 9 in decimal.
1001 in all number bases
Decimal9
Hexadecimal0x9
Binary1001
Octal11
How 1001 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
0× 22 = 0 × 4 = 0
0× 21 = 0 × 2 = 0
1× 20 = 1 × 1 = 1
Sum: 9