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Base 21 to Base 2

Base 21 to Base 2 Converter

Enter a number in base 21 below to convert it to base 2 instantly.

About These Bases

Base 21

In base 21, each digit position represents a power of 21: the rightmost digit counts individual ones, the next counts groups of 21, the next counts groups of 21×21, and so on — the same place-value idea as base 10, just with 21 distinct digits instead of ten.

Base 2

Base 2 works the same way: the rightmost digit counts ones, the next counts groups of 2, the next counts groups of 2×2, and so on, using 2 distinct digits.

Quick Reference Table

Base 10	Base 21	Base 2
1	1	1
2	2	10
3	3	11
4	4	100
5	5	101
6	6	110
7	7	111
8	8	1000
9	9	1001
10	A	1010
11	B	1011
12	C	1100
13	D	1101
14	E	1110
15	F	1111
16	G	10000
17	H	10001
18	I	10010
19	J	10011
20	K	10100
21	10	10101
22	11	10110
23	12	10111
24	13	11000
25	14	11001
26	15	11010
27	16	11011
28	17	11100
29	18	11101
30	19	11110
31	1A	11111
32	1B	100000
33	1C	100001
34	1D	100010
35	1E	100011
36	1F	100100
37	1G	100101
38	1H	100110
39	1I	100111
40	1J	101000
41	1K	101001
42	20	101010
43	21	101011
44	22	101100
45	23	101101
46	24	101110
47	25	101111
48	26	110000
49	27	110001
50	28	110010
51	29	110011
52	2A	110100
53	2B	110101
54	2C	110110
55	2D	110111
56	2E	111000
57	2F	111001
58	2G	111010
59	2H	111011
60	2I	111100
61	2J	111101
62	2K	111110
63	30	111111
64	31	1000000
70	37	1000110
80	3H	1010000
90	46	1011010
100	4G	1100100
200	9B	11001000
300	E6	100101100
400	J1	110010000
500	12H	111110100
600	17C	1001011000
700	1C7	1010111100
800	1H2	1100100000
900	20I	1110000100
1000	25D	1111101000

View this as a standalone, printable table

Related Base Conversion Calculators

From Base 21

to Base 2
to Base 3
to Base 4
to Base 5
to Base 6
to Base 7
to Base 8
to Base 9
to Base 10
to Base 11
to Base 12
to Base 13
to Base 14
to Base 15
to Base 16
to Base 17
to Base 18
to Base 19
to Base 20
to Base 22
to Base 23
to Base 24
to Base 25
to Base 26
to Base 27
to Base 28
to Base 29
to Base 30
to Base 31
to Base 32
to Base 33
to Base 34
to Base 35
to Base 36
to Base 37
to Base 38
to Base 39
to Base 40
to Base 41
to Base 42
to Base 43
to Base 44
to Base 45
to Base 46
to Base 47
to Base 48
to Base 49
to Base 50
to Base 51
to Base 52
to Base 53
to Base 54
to Base 55
to Base 56
to Base 57
to Base 58
to Base 59
to Base 60
to Base 61
to Base 62
to Base 63
to Base 64

From Base 2

to Base 3
to Base 4
to Base 5
to Base 6
to Base 7
to Base 8
to Base 9
to Base 10
to Base 11
to Base 12
to Base 13
to Base 14
to Base 15
to Base 16
to Base 17
to Base 18
to Base 19
to Base 20
to Base 21
to Base 22
to Base 23
to Base 24
to Base 25
to Base 26
to Base 27
to Base 28
to Base 29
to Base 30
to Base 31
to Base 32
to Base 33
to Base 34
to Base 35
to Base 36
to Base 37
to Base 38
to Base 39
to Base 40
to Base 41
to Base 42
to Base 43
to Base 44
to Base 45
to Base 46
to Base 47
to Base 48
to Base 49
to Base 50
to Base 51
to Base 52
to Base 53
to Base 54
to Base 55
to Base 56
to Base 57
to Base 58
to Base 59
to Base 60
to Base 61
to Base 62
to Base 63
to Base 64

Base 21 to Base 2