The ternary numeral system (also called base-3) has three as its base. Analogous to a bit, a ternary digit is a trit (trinary digit). One trit is equivalent to log23 (about 1.58496) bits of information.
| ternary (base 3) | base 7 | ternary (base 3) | base 7 |
|---|---|---|---|
| 1 | = 1 | 102 | = 14 |
| 2 | = 2 | 110 | = 15 |
| 10 | = 3 | 111 | = 16 |
| 11 | = 4 | 112 | = 20 |
| 12 | = 5 | 120 | = 21 |
| 20 | = 6 | 121 | = 22 |
| 21 | = 10 | 122 | = 23 |
| 22 | = 11 | 200 | = 24 |
| 100 | = 12 | 201 | = 25 |
| 101 | = 13 | 202 | = 26 |
| base 7 | ternary (base 3) | base 7 | ternary (base 3) |
|---|---|---|---|
| 1 | ≈ 1 | 14 | ≈ 102 |
| 2 | ≈ 2 | 15 | ≈ 110 |
| 3 | ≈ 10 | 16 | ≈ 111 |
| 4 | ≈ 11 | 20 | ≈ 112 |
| 5 | ≈ 12 | 21 | ≈ 120 |
| 6 | ≈ 20 | 22 | ≈ 121 |
| 10 | ≈ 21 | 23 | ≈ 122 |
| 11 | ≈ 22 | 24 | ≈ 200 |
| 12 | ≈ 100 | 25 | ≈ 201 |
| 13 | ≈ 101 | 26 | ≈ 202 |
| ternary (base 3) | base 7 |
|---|---|
| 1 | = 1 |
| 2 | = 2 |
| 10 | = 3 |
| 11 | = 4 |
| 12 | = 5 |
| 20 | = 6 |
| 21 | = 10 |
| 22 | = 11 |
| 100 | = 12 |
| 101 | = 13 |