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Base 21 to Base 4

Base 21 to Base 4 Converter

Enter a number in base 21 below to convert it to base 4 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 4

Base 4 works the same way: the rightmost digit counts ones, the next counts groups of 4, the next counts groups of 4×4, and so on, using 4 distinct digits.

Quick Reference Table

Base 10	Base 21	Base 4
1	1	1
2	2	2
3	3	3
4	4	10
5	5	11
6	6	12
7	7	13
8	8	20
9	9	21
10	A	22
11	B	23
12	C	30
13	D	31
14	E	32
15	F	33
16	G	100
17	H	101
18	I	102
19	J	103
20	K	110
21	10	111
22	11	112
23	12	113
24	13	120
25	14	121
26	15	122
27	16	123
28	17	130
29	18	131
30	19	132
31	1A	133
32	1B	200
33	1C	201
34	1D	202
35	1E	203
36	1F	210
37	1G	211
38	1H	212
39	1I	213
40	1J	220
41	1K	221
42	20	222
43	21	223
44	22	230
45	23	231
46	24	232
47	25	233
48	26	300
49	27	301
50	28	302
51	29	303
52	2A	310
53	2B	311
54	2C	312
55	2D	313
56	2E	320
57	2F	321
58	2G	322
59	2H	323
60	2I	330
61	2J	331
62	2K	332
63	30	333
64	31	1000
70	37	1012
80	3H	1100
90	46	1122
100	4G	1210
200	9B	3020
300	E6	10230
400	J1	12100
500	12H	13310
600	17C	21120
700	1C7	22330
800	1H2	30200
900	20I	32010
1000	25D	33220

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 4

to Base 2
to Base 3
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 4