The vigesimal or base 20 numeral system is based on twenty (in the same way in which the decimal numeral system is based on ten).
| hexadecimal (base 16) | ternary (base 3) | hexadecimal (base 16) | ternary (base 3) |
|---|---|---|---|
| 1 | = 1 | b | = 102 |
| 2 | = 2 | c | = 110 |
| 3 | = 10 | d | = 111 |
| 4 | = 11 | e | = 112 |
| 5 | = 12 | f | = 120 |
| 6 | = 20 | g | = 121 |
| 7 | = 21 | h | = 122 |
| 8 | = 22 | i | = 200 |
| 9 | = 100 | j | = 201 |
| a | = 101 | 10 | = 202 |
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) | hexadecimal (base 16) | ternary (base 3) | hexadecimal (base 16) |
|---|---|---|---|
| 1 | ≈ 1 | 102 | ≈ b |
| 2 | ≈ 2 | 110 | ≈ c |
| 10 | ≈ 3 | 111 | ≈ d |
| 11 | ≈ 4 | 112 | ≈ e |
| 12 | ≈ 5 | 120 | ≈ f |
| 20 | ≈ 6 | 121 | ≈ g |
| 21 | ≈ 7 | 122 | ≈ h |
| 22 | ≈ 8 | 200 | ≈ i |
| 100 | ≈ 9 | 201 | ≈ j |
| 101 | ≈ a | 202 | ≈ 10 |
| hexadecimal (base 16) | ternary (base 3) |
|---|---|
| 1 | = 1 |
| 2 | = 2 |
| 3 | = 10 |
| 4 | = 11 |
| 5 | = 12 |
| 6 | = 20 |
| 7 | = 21 |
| 8 | = 22 |
| 9 | = 100 |
| a | = 101 |