Roman Numeral Converter and Calculator
Roman Numeral Converter and Calculator works out Roman numeral and Value from Number, Roman numeral and First value. The default figures on this page give roman numeral of MMXXIV; change any entry and the result, the working and the sources update together.
Your figures
Updates as you typeHow this is worked out
3 steps
- Take the largest standard token not exceeding the remainder, repeatedly.
- 2024 = M = 1000 + M = 1000 + X = 10 + X = 10 + IV = 4
- Concatenated left to right: MMXXIV
Symbol breakdowntable
Its 5 worked examples are re-run on every release, last on 15 September 2026. What changed
Sources and references
3 sources
What the Roman Numeral Converter and Calculator calculates
Converts whole numbers to Roman numerals and back in the standard subtractive form, and adds, subtracts, multiplies or divides two numerals.
How to use this Roman Numeral Converter and Calculator
Enter Number, Roman numeral, First value and Operation. Roman numeral updates as you type, and “Use a worked example” loads checked figures you can adjust. Change one figure at a time to see what drives the result.
How the result is worked out
Open “How this is worked out” beside the result for the step-by-step calculation behind Roman numeral, Value and Expression.
The method follows Encyclopaedia Britannica, "Roman numeral", Karl Menninger, Number Words and Number Symbols: A Cultural History of Numbers (MIT Press, 1969), ch. on Roman numerals and The Unicode Standard, Number Forms block U+2160-U+217F (Roman numerals).
1994 in Roman numerals example
With What do you want to do?: to-roman, Number: 1994, the calculator returns Roman numeral: MCMXCIV, Value: 1994, Symbols used: 7. This example is checked against an independent source in the test suite.
What you can compare
Change one input at a time to see how it affects Roman numeral, Value and Expression. The inputs you can vary are Number, Roman numeral, First value, Operation and Second value.
Results are general information, not financial, tax, legal, medical or engineering advice. Check any decision that matters with a qualified professional.
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Frequently asked questions
What is "I love you" in Roman numerals?
Converts whole numbers to Roman numerals and back in the standard subtractive form, and adds, subtracts, multiplies or divides two numerals. On this page it is computed from Number, Roman numeral and First value and shown as Roman numeral, Value and Expression.
How do I convert numbers to Roman numerals?
Converts whole numbers to Roman numerals and back in the standard subtractive form, and adds, subtracts, multiplies or divides two numerals. Open “How this is worked out” beside the result to see each step for your own figures.
What is 1, 2, 3, 4, 5, 6, 7, 8, 9 in Roman numerals?
It needs Number, Roman numeral, First value, Operation and Second value. Nothing else is required, and the figures stay in your browser.
How do I convert a date to Roman numerals?
The result gives Roman numeral, Value, Expression, Symbol breakdown and Symbols used, each labelled with its unit so the figure can be read on its own.
What information do I need for the Roman Numeral Converter and Calculator?
You need Number, Roman numeral, First value, Operation and Second value. The page opens with default figures that give roman numeral of MMXXIV, so you can see the scale before entering your own.
What does this Roman Numeral Converter and Calculator show?
It shows Roman numeral, Value, Expression, Symbol breakdown and Symbols used, with the working and any warnings for your entries.