Roman Numeral Converter

Converts numbers to Roman numerals.

Result

Roman numeral
MMXXVI

How to use the roman numeral converter

  1. Enter the number (1–3999).
  2. The results update as you type, or press Calculate.
  3. Read the roman numeral first, then the supporting figures below it.

Formula

Combine M, D, C, L, X, V and I using subtractive pairs.

Worked example

For example, with these inputs:

the calculator returns:

Background

These calculations appear throughout the Singapore syllabus, from primary school percentages and fractions to secondary school algebra and geometry. Understanding the formula makes problem sums easier because you can recognise which quantity is missing.

Calculators are best used to check working rather than replace it, especially for exams where method marks count. Work the problem by hand first, then confirm with the calculator.

Frequently asked questions

How does the roman numeral converter work?

It applies this formula: Combine M, D, C, L, X, V and I using subtractive pairs.

Can I use any units?

Yes, as long as every input uses the same unit. The answer will be in that unit (squared for areas, cubed for volumes).

Guides for this calculator

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