111011111 Binary in Decimal

Write down the powers of 2 starting from the right, with the first digit corresponding to 2⁰, the second to 2¹, the third to 2², and so on.

Multiply each binary digit by its corresponding power of 2 and sum the results.

(1 × 256) + (1 × 128) + (1 × 64) + (0 × 32) + (1 × 16) + (1 × 8) + (1 × 4) + (1 × 2) + (1 × 1) = 256 + 128 + 64 + 0 + 16 + 8 + 4 + 2 + 1 = 479