Hexadecimal number 12C in decimal

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What is 12C hex in decimal?

Answer

Hexadecimal number 12C (0x12C) in decimal is

300

Read as an unsigned hex number — A = 10 … F = 15, case does not matter, 0x is only a prefix.

Digit × place value, then add

1×256 + 2×16 + 12×1 = 256 + 32 + 12 = 300

Hexadecimal number 12C (0x12C) in decimal is 300

12C hex in binary is 100101100: each hex digit is 4 bits — 1 = 0001, 2 = 0010, C = 1100.

300 takes 9 bits; 3 hex digits hold 12 (0001 0010 1100).