In base 10, the last digit of the number is for ones, the next to last digit is for tens, the digit before that is for hundreds (100=10*10), and so on. For example, number 345 means five ones plus four tens plus three hundreds.

In base 16, the last digit of the number is for ones, the digit before that for sixteens (number 16 in base 10 system), the digit before that for 256s in base 10 system (256=16*16) and so on. The digits of base 16 system are 1, 2, 3, 4, 5, 6, 7, 8, 9, A for 10, B for 11, C for 12, D for 13, E for 14, and F for 15. Numbers that are greater than 15 are expressed in numbers with more than 1 digit (just as in base 10 numbers that are greater than 9 are expressed in more than one digit).

For example, 4E in base 16 system translates into 14 + 4*16=78 in decimal (base 10) system.

100 in base 16 translates into 0 + 0 + 256*1=256 in decimal system.

*	1	2	3	4	5	6	7	8	9	A	B	C	D	E	F	10
1	1	2	3	4	5	6	7	8	9	A	B	C	D	E	F	10
2	2	4	6	8	A	C	E	10	12	14	16	18	1A	1C	1E	20
3	3	6	9	C	F	12	15	18	1B	1E	21	24	27	2A	2D	30
4	4	8	C	10	14	18	1C	20	24	28	2C	30	34	38	3C	40
5	5	A	F	14	19	1E	23	28	2D	32	37	3C	41	46	4B	50
6	6	C	12	18	1E	24	2A	30	36	3C	42	48	4E	54	5A	60
7	7	E	15	1C	23	2A	31	38	3F	46	4D	54	5B	62	69	70
8	8	10	18	20	28	30	38	40	48	50	58	60	68	70	78	80
9	9	12	1B	24	2D	36	3F	48	51	5A	63	6C	75	7E	87	90
A	A	14	1E	28	32	3C	46	50	5A	64	6E	78	82	8C	96	A0
B	B	16	21	2C	37	42	4D	58	63	6E	79	84	8F	9A	A5	B0
C	C	18	24	30	3C	48	54	60	6C	78	84	90	9C	A8	B4	C0
D	D	1A	27	34	41	4E	5B	68	75	82	8F	9C	A9	B6	C3	D0
E	E	1C	2A	38	46	54	62	70	7E	8C	9A	A8	B6	C4	D2	E0
F	F	1E	2D	3C	4B	5A	69	78	87	96	A5	B4	C3	D2	E1	F0
10	10	20	30	40	50	60	70	80	90	A0	B0	C0	D0	E0	F0	100

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© Copyright 1998 by Maria Droujkova and Dmitri Droujkov. All rights reserved. No part of these materials should ever be used in any situation that involves compulsory teaching. See also copyright notes and student rights.