About the Date to Roman Numerals
Dates written in Roman numerals look elegant on wedding invitations, anniversary gifts, tattoos, engravings and building cornerstones. This tool converts the day, the month and the year of a date to Roman numerals and joins them with the separator you prefer. It handles years from 1 to 3999. Type a date and a separator and the date in Roman numerals appears at once, with a few related figures underneath, and you can copy the result with one tap. The sums run in your browser, so nothing you enter is uploaded.
Updated October 2026
How to use the Date to Roman Numerals
- 1Enter a date and a separator.
- 2Pick the units or options from the menus if the date in Roman numerals tool offers them.
- 3Read the date in Roman numerals in the large result box.
- 4Look at the extra rows for related figures.
- 5Press Copy result to keep the answer.
When you need the date in Roman numerals
People use Roman dates to mark special days in a style that looks timeless. Designers use them on certificates, film credits and clock faces, and students use them to learn how the numerals work.
There are different ways to write a Roman date. The day-month-year order is used in much of the world, and the American order is month-day-year; you can read the three parts shown separately and arrange them the way you like.
How the date in Roman numerals is worked out
Roman numerals use I = 1, V = 5, X = 10, L = 50, C = 100, D = 500 and M = 1,000. A smaller symbol in front of a larger one is subtracted, as in IV = 4, IX = 9, XL = 40, XC = 90, CD = 400 and CM = 900. The date 4 October 2026 is IV.X.MMXXVI, with day IV, month X and year MMXXVI. The date 31 December 1999 is XXXI-XII-MCMXCIX. The year 1994 is MCMXCIV.
Every answer on this page comes from that one rule, so you can check any result by hand with a calculator. The figures shown underneath, such as other units, are conversions of the same answer.
- Day, month and year parts
- Four separators
- Years 1 to 3999
Mistakes to avoid with date in Roman numerals
Roman numerals have no zero, so the numerals only describe whole numbers from 1. Years above 3,999 would need an overline notation that is not supported. Before a tattoo, double-check the numerals against the date, since a single wrong letter changes the date.
On phone and computer
On a phone, type into the boxes one after another and read the date in Roman numerals underneath; Copy result puts it on the clipboard for a message or a note. On a computer the inputs sit on the left and the answer on the right, so you can change one figure and watch the date in Roman numerals move. The date to roman numerals works the same on both. For more detail, Roman Numeral Converter changes any number, Day of the Year Calculator and Date Calculator work out the date first, and Number to Words writes numbers in plain English.
Features
- Check before a tattoo
- No zero in Roman numerals
- Arrange the parts as you like
- Clear messages when the date in Roman numerals inputs make no sense
- Copy the result with one tap
- Private: nothing is uploaded
Frequently asked questions
How do I calculate date in Roman numerals?
Roman numerals use I = 1, V = 5, X = 10, L = 50, C = 100, D = 500 and M = 1,000. A smaller symbol in front of a larger one is subtracted, as in IV = 4, IX = 9, XL = 40, XC = 90, CD = 400 and CM = 900. The date 4 October 2026 is IV.X.MMXXVI, with day IV, month X and year MMXXVI. The date 31 December 1999 is XXXI-XII-MCMXCIX. The year 1994 is MCMXCIV.
What is the formula for date in Roman numerals?
Roman numerals use I = 1, V = 5, X = 10, L = 50, C = 100, D = 500 and M = 1,000. A smaller symbol in front of a larger one is subtracted, as in IV = 4, IX = 9, XL = 40, XC = 90, CD = 400 and CM = 900. The date to roman numerals applies it exactly and rounds only the displayed answer to six significant figures.
How do I write 2026 in Roman numerals?
MMXXVI.
Why is 4 written IV and not IIII?
The subtractive form is standard. IIII is sometimes seen on clock faces.
What is the biggest year I can convert?
3999, which is MMMCMXCIX.
Is this date to roman numerals free and private?
Yes. It is free, needs no account and runs in your browser, so the numbers you type are not uploaded or stored.