Calculators

Roman Numeral Converter: Numbers to Roman Numerals and Back

Free, no sign-up, works in your browser. Convert numbers to Roman numerals and Roman numerals back to numbers, from 1 to 3999. See how each numeral adds up, and get the standard spelling when a numeral is written an unusual way.

2,026 = MMXXVI

How it adds up

  1. M1,000
  2. M1,000
  3. X10
  4. X10
  5. V5
  6. I1

The seven letters

I
1
V
5
X
10
L
50
C
100
D
500
M
1,000

A smaller letter before a larger one is subtracted: IV is 4, IX is 9, XL is 40, CM is 900.

How to use the Roman Numeral Converter

  1. Type a number, like 2026, or a numeral, like MMXXVI.
  2. Read the conversion and how it adds up.
  3. Copy the result.

Frequently asked questions

How do Roman numerals work?
Seven letters stand for values: I 1, V 5, X 10, L 50, C 100, D 500, M 1000. Add them from left to right, but subtract a smaller letter placed before a larger one: IV is 4.
What is 2026 in Roman numerals?
MMXXVI: two thousands (MM), two tens (XX), a five (V) and a one (I).
Why does it stop at 3999?
Standard Roman numerals use at most three M's. Larger numbers used a bar over letters to multiply by 1000, which isn't standard in plain text.
Is IIII wrong?
It's a traditional form seen on clock faces, but IV is the standard spelling. The tool reads both and tells you the usual one.
Is the Roman Numeral Converter free?
Yes. It's free to use, with no sign-up and nothing to install.

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