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Number System Conversions

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Note that the calculator that comes with the Microsoft Windows operating system can do conversions. To use the calculator click on Start, Programs, Accessories, Calculator. Then change the calculator to "Scientific" mode by clicking on View and then Scientific. Now you should see option buttons for Hex, Dec, Oct (Octal), and Bin (Binary). To convert 1234 Hex to decimal you would "clear" the calculator, click the Hex option button, enter 1234 and then click the Dec option button and you should see the result 4,660.

BCD = binary coded decimal

HEX	BINARY	DECIMAL	BCD	OCTAL
0	0000	0	0000 0000	0
1	0001	1	0000 0001	1
2	0010	2	0000 0010	2
3	0011	3	0000 0011	3
4	0100	4	0000 0100	4
5	0101	5	0000 0101	5
6	0110	6	0000 0110	6
7	0111	7	0000 0111	7
8	1000	8	0000 1000	10
9	1001	9	0000 1001	11
A	1010	10	0001 0000	12
B	1011	11	0001 0001	13
C	1100	12	0001 0010	14
D	1101	13	0001 0011	15
E	1110	14	0001 0100	16
F	1111	15	0001 0101	17
10	0001 0000	16	0001 0110	20
11	0001 0001	17	0001 0111	21
12	0001 0010	18	0001 1000	22
13	0001 0011	19	0001 1001	23
14	0001 0100	20	0010 0000	24
15	0001 0101	21	0010 0001	25
16	0001 0110	22	0010 0010	26
17	0001 0111	23	0010 0011	27
18	0001 1000	24	0010 0100	30
19	0001 1001	25	0010 0101	31
1A	0001 1010	26	0010 0110	32
1B	0001 1011	27	0010 0111	33
1C	0001 1100	28	0010 1000	34
1D	0001 1101	29	0010 1001	35
1E	0001 1110	30	0011 0000	36
1F	0001 1111	31	0011 0001	37

Number System Conversions

See also