How to use it
- Type a number (1 to 3999) or a Roman numeral like MMXXVI.
- Read the conversion and the breakdown of each part.
- Use the chart below for 1 to 100 and the round tens, hundreds and thousands.
Questions and answers
What are the seven Roman numerals?
I = 1, V = 5, X = 10, L = 50, C = 100, D = 500 and M = 1000. Every other number is built from them.
Why is 4 written IV and not IIII?
A smaller numeral before a larger one is subtracted: IV = 5 − 1. Only I, X and C are subtracted, and only from the next two numerals (IV, IX, XL, XC, CD, CM). Clocks often still show IIII.
How do you write 2026 in Roman numerals?
MMXXVI: MM (2000) + XX (20) + VI (6).
Why does it stop at 3999?
Standard numerals repeat a letter at most three times, so MMMCMXCIX (3999) is the largest. Larger numbers used a bar over the letters to multiply by 1000.
Is there a zero in Roman numerals?
No. The Romans had no numeral for zero; medieval texts sometimes used the word nulla.