Hexadecimal number 122 in decimal

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What is 122 hex in decimal?

Answer

Hexadecimal number 122 (0x122) in decimal is

290

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 + 2×1 = 256 + 32 + 2 = 290

Hexadecimal number 122 (0x122) in decimal is 290

122 hex in binary is 100100010: each hex digit is 4 bits — 1 = 0001, 2 = 0010, 2 = 0010.

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