Online Tools Harbor3 in every format
| In words | three |
|---|---|
| Uppercase | THREE |
| On a check (cheque) | Three dollars and 00/100 |
| Ordinal | 3rd · third |
| Roman numerals | III |
| US / UK format | 3 |
| European format | 3 |
| Scientific notation | 3 × 10^0 |
| Binary | 11 |
| Hexadecimal | 3 |
| Even / odd | Odd · prime number |
Frequently asked questions
How do you write 3 in words?
3 is written as "three".
How do you write 3 on a check?
Write "Three dollars and 00/100" on the amount line and 3.00 in the box.
What is 3 in Roman numerals?
3 in Roman numerals is III.
What is the ordinal of 3?
The ordinal form is 3rd ("third").
Spell out any number with the Number to Words Converter, or convert to Roman numerals with the Roman Numeral Converter.