7645 Octal in Hex

Converting an octal number to hexadecimal without a calculator involves first converting the octal number to binary, then grouping the binary digits into groups of four, and finally converting each group to its hexadecimal equivalent. Here's a step-by-step guide for octal number7645:

Convert each octal digit to its 3-bit binary equivalent:

78 = 1112

68 = 1102

48 = 1002

58 = 1012

Group the binary digits into groups of four, starting from the right. If the last group has fewer than four digits, pad it with zeros on the left.

Binary: 1111 1010 0101

With Zeros: 1111 1010 0101

Convert each group of binary digits to its hexadecimal equivalent:

11112 = F16

10102 = A16

01012 = 516