Roman Numerals
Train conversion and recall between Arabic numbers and Roman numerals
About Roman Numerals
Roman Numerals is an educational trainer that helps you master conversion and recall between Arabic numbers and Roman numerals (e.g., 49 ↔ XLIX). The game challenges you across multiple difficulty levels, progressively introducing larger symbols and tricky subtractive combinations.
Memory & Technique Hint: To read Roman numerals quickly, anchor on key symbols: Ⅰ (1), Ⅴ (5), Ⅹ (10), Ⅼ (50), Ⅽ (100), Ⅾ (500), and Ⅿ (1000). Remember that a smaller symbol placed before a larger one means subtraction (e.g., ⅠⅤ is 4, ⅠⅩ is 9, ⅩⅬ is 40, and ⅩⅭ is 90).
Every round is generated deterministically from a seed, so the printable worksheet's answer key always matches the live game. Runs entirely in your browser and works offline as a Progressive Web App.
FAQ
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What is the general rule of Roman numerals?
Roman numerals are read left to right, adding values together. However, if a smaller numeral is placed before a larger numeral, the smaller value is subtracted from the larger one (e.g., IV = 5 - 1 = 4). -
What are the core Roman numeral symbols?
The seven core symbols are: I (1), V (5), X (10), L (50), C (100), D (500), and M (1000). -
How high do Roman numerals go in this game?
In this game, numbers scale up to 3999 (MMMCMXCIX) which is the standard ceiling for traditional Roman numerals.