171 in Roman Numerals
The number 171 is written CLXXI in Roman numerals. Click the numeral below to copy it, or use the converter to try any other number.
CLXXI uses 4 of the seven Roman numeral symbols and is 5 characters long.
CLXXI is purely additive: every symbol is worth what it says and you simply add them together from left to right.
171 in Roman numerals
Also written in words as one hundred seventy-one, and read aloud as C L X X I.
Roman numeral converter
Convert a number into Roman numerals, or read a Roman numeral back into a number. Works for 1 to 3999, the range the seven standard symbols can express.
How 171 breaks down into Roman numerals
100 + 50 + 20 + 1 = 171, so C + L + XX + I = CLXXI.
| Place value | Roman numeral | Why | Copy |
|---|---|---|---|
| 100 | C | C is 100 | |
| 50 | L | L is 50 | |
| 20 | XX | X is 10, written 2 times | |
| 1 | I | I is 1 |
No symbol on this page matches that search. Try a shorter word.
Numbers either side of 171
- 166 = CLXVI
- 167 = CLXVII
- 168 = CLXVIII
- 169 = CLXIX
- 170 = CLXX
- 172 = CLXXII
- 173 = CLXXIII
- 174 = CLXXIV
- 175 = CLXXV
- 176 = CLXXVI
Related numbers
Browse the full charts: Roman numerals hub, 1 to 100, years 1900 to 2100.
How to write 171 in Roman numerals, step by step
Roman numerals are built from largest value to smallest. Split 171 into place values first: 100 + 50 + 20 + 1.
Now swap each part for its symbols: 100 becomes C, 50 becomes L, 20 becomes XX, 1 becomes I. Written together that is CLXXI.
No subtraction is needed here, so the symbols are simply added in descending order.
- 100 = C (C is 100)
- 50 = L (L is 50)
- 20 = XX (X is 10, written 2 times)
- 1 = I (I is 1)
Is CLXXI written correctly?
Yes. CLXXI is the standard modern form of 171. A valid Roman numeral never repeats a symbol more than three times in a row, never repeats V, L or D at all, and only ever subtracts I, X or C, and only from the next two larger symbols.
Those rules are what keeps a number to a single accepted spelling, so a reader never has to guess.
How to type CLXXI on a keyboard
Roman numerals are ordinary capital letters, so you can type CLXXI directly: C, L, X, X, I. Nothing special is required and it will work in any font, any document and any web form.
Unicode also contains dedicated Roman numeral characters such as Ⅰ, Ⅴ, Ⅹ, Ⅼ, Ⅽ, Ⅾ and Ⅿ. They exist for typesetting East Asian text and they look almost identical, but search engines, spell checkers and screen readers handle the plain letters better, so the letters are usually the right choice.
Where you will see CLXXI
Numbers of this size turn up as chapter and page numbers in front matter, as list levels in outlines, as monarch and pope regnal numbers, and in the names of recurring events such as Super Bowl finals.
If you are using CLXXI in a document, keep it in capitals. Lowercase roman numerals (clxxi) are conventionally reserved for preliminary page numbering and sub-lists.
Frequently asked questions
How do you write 171 in Roman numerals?
171 is written CLXXI. Break it into 100 + 50 + 20 + 1, then write C + L + XX + I, which joins up as CLXXI.
What number is CLXXI?
CLXXI is 171, or one hundred seventy-one in words.
Is there another way to write 171 in Roman numerals?
CLXXI is the standard form. Any other arrangement of the same symbols would break the rule that values are written from largest to smallest.
How do I copy CLXXI?
Click the large numeral at the top of this page. It copies straight to your clipboard, ready to paste anywhere.
Do Roman numerals have a zero?
No. The system has no symbol for zero and no way to write a negative number or a fraction of one, which is one reason it was replaced for arithmetic.