33 in Roman numerals
XXXIII
The number 33 is written XXXIII in Roman numerals.
How XXXIII breaks down
| Symbols | Value |
|---|---|
XXX | 3 × 10 = 30 |
III | 3 × 1 = 3 |
XXXIII | 33 |
Every symbol here is written in descending order and simply added together — no subtractive pairs are involved.
Nearby numbers
| Number | Roman numeral |
|---|---|
| 28 | XXVIII |
| 29 | XXIX |
| 30 | XXX |
| 31 | XXXI |
| 32 | XXXII |
| 33 | XXXIII |
| 34 | XXXIV |
| 35 | XXXV |
| 36 | XXXVI |
| 37 | XXXVII |
| 38 | XXXVIII |
The seven symbols
I | 1 | C | 100 |
V | 5 | D | 500 |
X | 10 | M | 1,000 |
L | 50 |
33 in other notations
| Roman | XXXIII |
| Binary | 100001 |
| Hexadecimal | 21 |
| Octal | 41 |
| Written out | thirty-three |
Writing it by hand
Work down through the symbol values, taking as many of each as will fit before moving to the next. For 33:
3 × X = 30 remaining: 3
3 × I = 3 remaining: 0The result reads XXXIII — 6 characters, against 2 digits in Arabic numerals. The verbosity at numbers like this is precisely why positional notation replaced the system for arithmetic.
Frequently asked questions
What is 33 in Roman numerals?
XXXIII
How do you read XXXIII?
Work left to right, adding each symbol — except where a smaller symbol precedes a larger one, in which case it is subtracted. XXX is 30, III is 3, giving 33 in total.
How do you write 33 in words?
thirty-three.
Why is there no zero?
Roman numerals have no symbol for zero. The concept reached Europe only with Hindu-Arabic numerals, centuries after the system was in use — which is a large part of why it was eventually replaced for arithmetic.