Number
820 in Roman numerals
820 is written DCCCXX
Type any other number or numeral below to convert it.
Above 3,999? Type the barred part in brackets, e.g. (IV)CC = 4,200.
How DCCCXX is built
Roman numerals are written one decimal place at a time, largest first.
- DCCChundreds · 8D (500) plus CCC (300) makes 800.
- XXtens · 2X written 2 times: 2 × 10 = 20.
800 + 20 = 820
No subtraction is needed here: every letter is the same size or smaller than the one before it, so you simply add them up.
Mistakes to avoid
- There's no letter for zero. The zero is simply left out, which is why 820 has 2 parts, not 3.
About the number 820
- 820 is even and can be split into prime factors: 2 × 2 × 5 × 41, or in Roman numerals II × II × V × XLI.
- DCCCXX has 6 letters. 396 of the numbers up to 1,000 have longer numerals.
Counting from 811 to 820
Every number from 811 to 820 starts DCCCX (810); only the ending changes.
| Number | Roman numeral |
|---|---|
| 811 | DCCCXI |
| 812 | DCCCXII |
| 813 | DCCCXIII |
| 814 | DCCCXIV |
| 815 | DCCCXV |
| 816 | DCCCXVI |
| 817 | DCCCXVII |
| 818 | DCCCXVIII |
| 819 | DCCCXIX |
| 820 | DCCCXX |