If you have ever paused over a clock face, a film credit, or a chapter heading, you have met Roman numerals. The system looks cryptic at first, but it runs on just seven letters and two reading rules. This guide gives you the complete Roman numerals chart from 1 to 100, explains how to read any numeral without guessing, shows how to write any year, and flags the mistakes that give the game away.
There is a free Roman Numeral Converter that will do the arithmetic for you — and a handy how old am I exactly calculator that will tell you your age in years and days. Use this guide to understand the system, then use the tools to check your work.
The seven letters you need
Roman numerals use just seven letters. Everything else is built from them.
| Letter | Value |
|---|---|
| I | 1 |
| V | 5 |
| X | 10 |
| L | 50 |
| C | 100 |
| D | 500 |
| M | 1,000 |
I, V, X, L, C, D and M are the whole alphabet. There is no symbol for zero, and no symbol larger than M, which is one reason the system tops out in standard notation at 3,999.
Notice the pattern: I, X, C and M are powers of ten (1, 10, 100, 1,000), while V, L and D are the halfway points (5, 50, 500). That pattern is what makes the system readable once you know the two rules below.
Roman numerals chart 1-100
Here is the complete chart. Read it in columns of twenty: the left-hand block runs from 1 to 20, the next from 21 to 40, and so on to 100.
| Number | Roman | Number | Roman | Number | Roman | Number | Roman | Number | Roman |
|---|---|---|---|---|---|---|---|---|---|
| 1 | I | 21 | XXI | 41 | XLI | 61 | LXI | 81 | LXXXI |
| 2 | II | 22 | XXII | 42 | XLII | 62 | LXII | 82 | LXXXII |
| 3 | III | 23 | XXIII | 43 | XLIII | 63 | LXIII | 83 | LXXXIII |
| 4 | IV | 24 | XXIV | 44 | XLIV | 64 | LXIV | 84 | LXXXIV |
| 5 | V | 25 | XXV | 45 | XLV | 65 | LXV | 85 | LXXXV |
| 6 | VI | 26 | XXVI | 46 | XLVI | 66 | LXVI | 86 | LXXXVI |
| 7 | VII | 27 | XXVII | 47 | XLVII | 67 | LXVII | 87 | LXXXVII |
| 8 | VIII | 28 | XXVIII | 48 | XLVIII | 68 | LXVIII | 88 | LXXXVIII |
| 9 | IX | 29 | XXIX | 49 | XLIX | 69 | LXIX | 89 | LXXXIX |
| 10 | X | 30 | XXX | 50 | L | 70 | LXX | 90 | XC |
| 11 | XI | 31 | XXXI | 51 | LI | 71 | LXXI | 91 | XCI |
| 12 | XII | 32 | XXXII | 52 | LII | 72 | LXXII | 92 | XCII |
| 13 | XIII | 33 | XXXIII | 53 | LIII | 73 | LXXIII | 93 | XCIII |
| 14 | XIV | 34 | XXXIV | 54 | LIV | 74 | LXXIV | 94 | XCIV |
| 15 | XV | 35 | XXXV | 55 | LV | 75 | LXXV | 95 | XCV |
| 16 | XVI | 36 | XXXVI | 56 | LVI | 76 | LXXVI | 96 | XCVI |
| 17 | XVII | 37 | XXXVII | 57 | LVII | 77 | LXXVII | 97 | XCVII |
| 18 | XVIII | 38 | XXXVIII | 58 | LVIII | 78 | LXXVIII | 98 | XCVIII |
| 19 | XIX | 39 | XXXIX | 59 | LIX | 79 | LXXIX | 99 | XCIX |
| 20 | XX | 40 | XL | 60 | LX | 80 | LXXX | 100 | C |
Keep this chart open while you work through the rules below. Every number from 1 to 100 appears exactly once, and the patterns — III, VIII, XIII, XVIII, XXIII — repeat every ten.
How to read any Roman numeral
Reading a Roman numeral is a left-to-right exercise. Start with the biggest value and work down, but watch for one small exception.
The two rules
- Add the symbols. If the symbols get smaller as you move right, just add them: VI is 5 + 1 = 6, and VIII is 5 + 1 + 1 + 1 = 8.
- Subtract a smaller symbol before a larger one. If a smaller symbol comes before a larger one, subtract it instead: IV is 5 − 1 = 4, and IX is 10 − 1 = 9.
That is the whole system. A numeral is either a run of decreasing symbols that you add, or a small symbol in front of a larger one that you subtract.
Use the free Roman Numeral Converter to check your reading: enter the numeral and it will show the value and the breakdown.
These six pairs are the only subtractions the system allows. Learn them and you can read anything.
| Pair | Value |
|---|---|
| IV | 4 |
| IX | 9 |
| XL | 40 |
| XC | 90 |
| CD | 400 |
| CM | 900 |
And there is a strict limit: only I, X and C may be used as the subtracting symbol, and each subtraction uses just one smaller symbol. That is why 99 is XCIX, not IC — I may not subtract from C.
XIV = 10 + (5 − 1) = 14.
Read it left to right: X is 10, then IV is a subtractive pair worth 4, so 10 + 4 = 14. The pair is read as a unit, not as I minus V in isolation.
99 = 90 + 9 = XC + IX = XCIX (not IC).
Split it into tens and ones before you write it: 90 is XC and 9 is IX, so the full numeral is XCIX. Writing IC would skip a place value, which the system does not allow.
How to write any number — and any year
Writing a number is the reverse of reading it: split it by place value, convert each part, then join the parts from largest to smallest.
2026 = MM + XX + VI = 2,000 + 20 + 6.
Split it into thousands, hundreds, tens and ones: 2,000 is MM, 20 is XX, 6 is VI, so 2026 is MMXXVI. The free Roman Numeral Converter converts in both directions, so you can check a year or a numeral instantly.
47 = XL + VII = 40 + 7.
Split 47 into 40 and 7: 40 is XL, 7 is VII, so 47 is XLVII.
The method for any number
- Split the number by place value. For 1984, that is 1,000 + 900 + 80 + 4.
- Convert each part using the chart or the subtractive pairs. 1,000 is M, 900 is CM, 80 is LXXX, 4 is IV.
- Join the parts from largest to smallest. 1,000 + 900 + 80 + 4 becomes MCMLXXXIV.
- Check for repeats. No symbol should repeat more than three times in a row, and V, L and D should never repeat at all.
The same method works for any year. Take 2025: 2,000 is MM, 20 is XX, 5 is V, so 2025 is MMXXV. Try your birth year next — it is the most satisfying one to write.
Mistakes that give the game away
Most mistakes come from pushing a rule further than the system allows. Watch for these five:
- Never repeat V, L or D. V, L and D are never used twice in a row. If you need 10, write X, not VV, and if you need 100, write C, not LL.
- Never repeat a symbol more than three times in a row. Three is the limit, so 40 is XL, not XXXX.
- Do not subtract two symbols at once. Each subtraction is one smaller symbol before a larger one, so 8 is VIII, not IIX.
- Do not subtract from a symbol more than ten times larger. I may subtract from V and X only, X from L and C only, and C from D and M only — which is why 99 is XCIX, not IC.
- Reading backwards. Roman numerals are read left to right, largest values first (with subtractive pairs as the exception). A numeral that climbs and falls at random — like IXL — is not a valid number.
If your numeral passes all five checks, it is almost certainly right. If it fails one, the chart above will show you the correct form.
Where you still meet Roman numerals
Roman numerals were the usual way of writing numbers across Europe well into the late Middle Ages, and they were only gradually replaced by the Hindu-Arabic numerals we use today. But they never fully went away. You still meet them on clock faces, in the chapter numbers of books, in the outlines of documents and essays, and in the dates at the end of films. They also survive in numbered editions, sequels, and formal contexts where a classical look is the point.
The system’s history explains some of its quirks. According to Britannica, Roman numerals evolved from the Etruscan number system, which the Romans read in the opposite direction — the Etruscans read right to left, the Romans left to right. Early Roman use was also inconsistent: both IIII and IV appear in old inscriptions. The strict version in this article is the modern standard, settled long after the Romans themselves. For a clear walkthrough of the same rules, timeanddate’s guide to Roman numerals is also worth a look.
The limits of the system
Honesty about limits is part of reading Roman numerals well. There is no zero, so there is no Roman numeral for it, and negative numbers fall outside the system entirely. In standard notation the largest number is 3,999 — MMMCMXCIX — because M is the largest symbol and no symbol repeats more than three times. Historically, a horizontal line over a symbol (called a vinculum) multiplied it by 1,000, but that was never standardised, so you will rarely meet it outside history books.
The site’s Roman Numeral Converter respects exactly these limits: it converts 1 to 3,999 in both directions under the standard rules, and it will not accept zero or negatives, because the system has no way to write them.
Frequently asked questions
The questions readers ask most about Roman numerals, answered in one place.
Why is 4 written IV and not IIII?
Because no symbol may repeat more than three times in a row, and I before V is the accepted subtractive form for 4. IIII survives on some clock faces by tradition, but IV is standard elsewhere.
What is 99 in Roman numerals?
XCIX. Split 99 into 90 + 9: 90 is XC and 9 is IX, joined as XCIX. IC is not valid, because I may only subtract from V and X, never from C.
Is there a Roman numeral for zero?
No. The system never developed a symbol for zero, and negative numbers fall outside it too — both are outside what the converter can represent.
How do you write 2026 in Roman numerals?
Split it into 2000 + 20 + 6: MM + XX + VI = MMXXVI. Splitting by place value (thousands, hundreds, tens, ones) is the reliable method for any year.
What is the largest standard Roman numeral?
MMMCMXCIX, which is 3,999. Larger values need extra conventions such as the overline, which were never standardised, so 3,999 is where standard notation stops.
Does the Roman Numeral Converter work in both directions?
Yes. Enter a decimal number to get its Roman numeral, or a Roman numeral to read its decimal value — XLII converts back to 42. It covers 1 to 3,999.
Try it yourself
Now you have the chart, the two reading rules, and the place-value method for writing any year. Try a few on your own — your birth year, this year, and the trickiest number in the chart, 99 — then check them with the free Roman Numeral Converter. If you want more tools in the same spirit, browse the Math Tools category or the full list on All Tools.