Everyday
Percentages, tips & quick math
Roman Numerals 1-100 (1 to 100)
Roman numerals 1 to 100 run from I to C, with the key milestones X (10), L (50) and C (100) and subtractive pairs XL (40) and XC (90). This reference lists the tens and the pattern within each ten, plus a converter for any number to 3999 — computed in your browser. For example 42 is XLII (XL = 40, II = 2) and 99 is XCIX (XC = 90, IX = 9).
Quick answer
Milestones: X = 10, L = 50, C = 100
- XL = 40, XC = 90 (subtractive)
- 42 = XLII, 99 = XCIX
Frequently asked questions
What is 50 in Roman numerals?
50 is L. Other milestones: X = 10, C = 100. 40 is XL and 90 is XC (subtractive).
What is 99 in Roman numerals?
99 is XCIX — XC (90) + IX (9). It is not IC; subtraction only removes one step down (I from V/X, X from L/C, C from D/M).