     Steps:
1. Divide the decimal number by 16.   Treat the division as an integer division.
2. Write down the remainder (in hexadecimal).
3. Divide the result again by 16.  Treat the division as an integer division.
4. Repeat step 2 and 3 until result is 0.
5. The hex value is the digit sequence of the remainders from the last to first.

Note: a remainder in this topic refers to the left over value after performing an integer division.

 HEXADECIMAL 0 1 2 3 4 5 6 7 8 9 A B C D E F DECIMAL 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Example 1
Convert the number 1128 DECIMAL to HEXADECIMAL

 NOTES DIVISION RESULT REMAINDER (in HEXADECIMAL) Start by dividing the number by 16, that is    (1128/16). 1128 divided by 16 is 70.5.  So the integer division result is 70 (throw out anything after the decimal point).Record it on the RESULT column. The remainder is (70.5 - 70) multiplied with 16; or (0.5 times 16), which is 8.Record it on the REMAINDER column. 1128 / 16 70 8 Then, divide the result again by 16, that is   (70/16). (the number 70 on the DIVISION column  comes from the previous RESULT). In this case, 70/16=4.375.  So the integer division result is 4 (throw out anything after the decimal point) The remainder is (0.375 multiplied with 16, which is 6. 70 / 16 4 6 Repeat.   Note here that 4/16=0.25.  So the integer division result is 0. The remainder is (0.25-0) multiplied with 16, which is 4. 4 / 16 0 4 Stop because the result is already 0 (0 divided by 16 will always be 0) Well, here is the answer. These numbers come from the REMAINDER column values (read from bottom to top) 468

Side note: You can get the remainder of a division using the Modulus (or % operator in programming code).  Ie: 1128%16=8.

Example 2

Convert the number 256 DECIMAL to HEXADECIMAL

 DIVISION RESULT REMAINDER (in HEX) 256 / 16 16 0 16 / 16 1 0 1 / 16 0 1 ANSWER 100

Example 3
Convert the number 921 DECIMAL to HEXADECIMAL

 DIVISION RESULT REMAINDER (in HEX) 921 / 16 57 9 57 / 16 3 9 3 / 16 0 3 ANSWER 399

Example 4
Convert the number 188 DECIMAL to HEXADECIMAL

 DIVISION RESULT REMAINDER (in HEX) 188 / 16 11 C (12 decimal) 11 / 16 0 B (11 decimal) ANSWER BC

Note that here, the answer would not be 1112, but BC.  Remember to write down the remainder in hex, not decimal.

Example 5
Convert the number 100 DECIMAL to HEXADECIMAL

 DIVISION RESULT REMAINDER (HEX) 100 / 16 6 4 6 / 16 0 6 ANSWER 64

Example 6
Convert the number 590 DECIMAL to HEXADECIMAL

 DIVISION RESULT REMAINDER (HEX) 590 / 16 36 E (14 decimal) 36 / 16 2 4 (4 decimal) 2 / 16 0 2 (2 decimal) ANSWER 24E  