D meaning: 500 in Roman numerals
D means 500. Below is what each letter stands for, how to read D back with confidence, how to write 500 yourself, and the spellings to avoid.
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500 in words: Five hundred
Writing 500 takes no working out at all: it is one of the seven core symbols, so you write the single letter D and you are done. Nothing is added to it and nothing is taken from it.
The reason it is worth committing to memory is what comes next. D turns up inside a large share of longer numerals, so once you can write it without thinking you have a head start on every number built around it.
What D means, letter by letter
Five hundred, originally half of an older symbol for one thousand. It never repeats, so 1000 uses M rather than DD.
To read D back, scan it left to right, largest value first, adding as you go. The running total lands on 500:
| Read | Worth | Running total |
|---|---|---|
| D | 500 | 500 |
There is no subtraction anywhere in D, so every letter simply adds to the total: no letter changes the meaning of the one next to it. Read aloud, D is simply "five hundred".
Write D step by step
The rule is always the same: take the largest Roman value that still fits, write its symbol, subtract it, and repeat until nothing is left over. Applied to 500 that gives 1 step.
| Step | Take | Write | Numeral so far | Left to write |
|---|---|---|---|---|
| 1 | 500 | D | D | 0 |
Nothing is left over after step 1, so the finished numeral is D. Written out in English words that is "Five hundred".
Forms to avoid when writing 500
These are the spellings people reach for instead, and why each one is wrong for 500.
- Not DD. D never repeats. Two of them would simply be the next symbol up, so a doubled D is not a numeral at all.
Check D reads back as 500
Writing a numeral and verifying it are two different jobs, and the second one is what saves you on anything permanent. Read D back left to right, adding each group and treating any smaller-before-larger pair as a single subtraction. If you land on 500, the numeral is correct. The converter above does exactly this and refuses any non-standard spelling, so a value it accepts is a value you can use.
Where you will see D
Counted in order, D is the five hundredth number. Read as a year, 500 falls in the 5th century AD. It sits between the round anchors CD (400) and DC (600), which is the quickest way to place a numeral of this size at a glance.
Past a hundred, a numeral like D shows up mainly in dates, formal enumeration and anywhere a large figure is written out in full. You read it exactly as you read the small ones, by taking each group from the largest value down, "five hundred".
- Chapters and sections: Long documents number their parts in Roman numerals: legal codes, multi-volume sets and numbered sections all reach values like D, part 500.
- Dates and credits: Whenever a year or a copyright line is set in Roman numerals, values like D appear in full, which is where longer numerals are most commonly seen.
Frequently asked questions
What does D mean in Roman numerals?
D means 500, "five hundred". It is one of the seven core symbols, so the single letter carries the whole value.
What number is D?
D is the number 500. Scan the letters left to right and add each group, treating any smaller-before-larger pair as a single subtraction, and the total lands on 500.
Is D 500?
Yes. D is exactly 500 under the standard rules, and no other reading is valid: the converter on this page round-trips it both ways to confirm.
How do you write 500 in Roman numerals?
500 in Roman numerals is D. Take the largest Roman value that still fits, write its symbol, subtract it from what is left, and repeat until nothing remains. For 500 that is D, which spells D.
Why is 500 not written DD?
D never repeats. Two of them would simply be the next symbol up, so a doubled D is not a numeral at all.
How do you check D is written correctly?
Read it back. Scan D left to right, add each group, and treat any smaller-before-larger pair as one subtraction. If the total returns to 500, the numeral is right. The converter on this page round-trips it automatically and rejects any non-standard spelling, which is the quickest check before you engrave, print or ink it.
How is 500 written out in English words?
500 is "Five hundred". Roman numerals have no separate spoken form of their own, so D is simply read aloud as five hundred.
Once you can write D, how do you write 501?
501 is DI. Note that it is longer than D: adding one to a number can lengthen or shorten its numeral, because the shortcut pairs appear and disappear as you count. The procedure is identical, largest value first, all the way to 3999.
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Last updated July 22, 2026. Reviewed for accuracy against the standard rules for Roman numerals. How we check accuracy.