Roman Numerals

Pick a value to view its full reference table.

Roman numerals 1 through 10. Rome's number system uses letter combinations — still seen on clock faces, book chapters, and movie dates.

Rome’s numerals are additive landmarks: seven letters — I, V, X, L, C, D, M — for 1, 5, 10, 50, 100, 500, 1000, each landmark worth five or ten times its smaller neighbor. Subtraction appears only at three gates (I before V or X, X before L or C, C before D or M), which keeps every numeral short and readable. The system has no zero and no place value — exactly why it never became an arithmetic tool: you do not multiply in Roman numerals, you convert.

All 6 roman numerals pages include a full data table, a worked explanation, and related calculators. Start withnumber 10or jump straight to the value you need below.

• 10
• 20
• 50
• 100
• 500
• 1000