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Base 9 to Base 7

Base 9 to Base 7 Converter

Enter a number in base 9 below to convert it to base 7 instantly.

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About These Bases

Base 9

In base 9, each digit position represents a power of 9: the rightmost digit counts individual ones, the next counts groups of 9, the next counts groups of 9×9, and so on — the same place-value idea as base 10, just with 9 distinct digits instead of ten.

Base 7

Base 7 works the same way: the rightmost digit counts ones, the next counts groups of 7, the next counts groups of 7×7, and so on, using 7 distinct digits.

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Quick Reference Table
Base 10 Base 9 Base 7
1 1 1
2 2 2
3 3 3
4 4 4
5 5 5
6 6 6
7 7 10
8 8 11
9 10 12
10 11 13
11 12 14
12 13 15
13 14 16
14 15 20
15 16 21
16 17 22
17 18 23
18 20 24
19 21 25
20 22 26
21 23 30
22 24 31
23 25 32
24 26 33
25 27 34
26 28 35
27 30 36
28 31 40
29 32 41
30 33 42
31 34 43
32 35 44
33 36 45
34 37 46
35 38 50
36 40 51
37 41 52
38 42 53
39 43 54
40 44 55
41 45 56
42 46 60
43 47 61
44 48 62
45 50 63
46 51 64
47 52 65
48 53 66
49 54 100
50 55 101
51 56 102
52 57 103
53 58 104
54 60 105
55 61 106
56 62 110
57 63 111
58 64 112
59 65 113
60 66 114
61 67 115
62 68 116
63 70 120
64 71 121
70 77 130
80 88 143
90 110 156
100 121 202
200 242 404
300 363 606
400 484 1111
500 615 1313
600 736 1515
700 857 2020
800 1078 2222
900 1210 2424
1000 1331 2626

View this as a standalone, printable table

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