30 in words
British English
thirty
Thirty, not thirdty. It follows three the way thirteen does.
Quick reference
- In figures
- 30
- British English
- thirty
- American English
- The same (why they differ)
- Ordinal
- thirtieth (30th)
- Roman numeral
- XXX
- Place value
- 3 in the tens column
- Expanded form
- 30
- Standard form
- 3 × 10¹
- Even or odd
- Even
- Prime factors
- 2 × 3 × 5
Convert any other number, up to thirty-six digits.