Enter a number in base 21 below to convert it to base 6 instantly.
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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 6 works the same way: the rightmost digit counts ones, the next counts groups of 6, the next counts groups of 6×6, and so on, using 6 distinct digits.
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| Base 10 | Base 21 | Base 6 |
|---|---|---|
| 1 | 1 | 1 |
| 2 | 2 | 2 |
| 3 | 3 | 3 |
| 4 | 4 | 4 |
| 5 | 5 | 5 |
| 6 | 6 | 10 |
| 7 | 7 | 11 |
| 8 | 8 | 12 |
| 9 | 9 | 13 |
| 10 | A | 14 |
| 11 | B | 15 |
| 12 | C | 20 |
| 13 | D | 21 |
| 14 | E | 22 |
| 15 | F | 23 |
| 16 | G | 24 |
| 17 | H | 25 |
| 18 | I | 30 |
| 19 | J | 31 |
| 20 | K | 32 |
| 21 | 10 | 33 |
| 22 | 11 | 34 |
| 23 | 12 | 35 |
| 24 | 13 | 40 |
| 25 | 14 | 41 |
| 26 | 15 | 42 |
| 27 | 16 | 43 |
| 28 | 17 | 44 |
| 29 | 18 | 45 |
| 30 | 19 | 50 |
| 31 | 1A | 51 |
| 32 | 1B | 52 |
| 33 | 1C | 53 |
| 34 | 1D | 54 |
| 35 | 1E | 55 |
| 36 | 1F | 100 |
| 37 | 1G | 101 |
| 38 | 1H | 102 |
| 39 | 1I | 103 |
| 40 | 1J | 104 |
| 41 | 1K | 105 |
| 42 | 20 | 110 |
| 43 | 21 | 111 |
| 44 | 22 | 112 |
| 45 | 23 | 113 |
| 46 | 24 | 114 |
| 47 | 25 | 115 |
| 48 | 26 | 120 |
| 49 | 27 | 121 |
| 50 | 28 | 122 |
| 51 | 29 | 123 |
| 52 | 2A | 124 |
| 53 | 2B | 125 |
| 54 | 2C | 130 |
| 55 | 2D | 131 |
| 56 | 2E | 132 |
| 57 | 2F | 133 |
| 58 | 2G | 134 |
| 59 | 2H | 135 |
| 60 | 2I | 140 |
| 61 | 2J | 141 |
| 62 | 2K | 142 |
| 63 | 30 | 143 |
| 64 | 31 | 144 |
| 70 | 37 | 154 |
| 80 | 3H | 212 |
| 90 | 46 | 230 |
| 100 | 4G | 244 |
| 200 | 9B | 532 |
| 300 | E6 | 1220 |
| 400 | J1 | 1504 |
| 500 | 12H | 2152 |
| 600 | 17C | 2440 |
| 700 | 1C7 | 3124 |
| 800 | 1H2 | 3412 |
| 900 | 20I | 4100 |
| 1000 | 25D | 4344 |
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