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24 in Roman Numerals

24 in Roman numerals is XXIV. It breaks down as XX + IV, which adds up to 20 + 4 = 24.

  • Roman numeral
    XXIV
  • Lowercase
    xxiv
  • Breakdown
    XX + IV
  • In words
    twenty-four
  • Binary
    11000
  • Hexadecimal
    18

How to write 24 in Roman numerals

Roman numerals are built place by place, from the largest value to the smallest. For 24 the places are 20 (tens), 4 (ones).

  1. Write 20 as XX.
  2. Write 4 as IV.

Joined together, XX + IV gives XXIV.

24 digit by digit

PlaceValueNumeralRule used
tens20XXthe symbol repeated twice
ones4IVsubtractive: one symbol before the five symbol

Check XXIV by reading it back

Reading XXIV from left to right and adding the pieces: XX = 20, IV = 4. Together that is 20 + 4 = 24, so XXIV and 24 match.

Mistakes to avoid with XXIV

  • Do not write the 4s and 9s additively. 24 uses subtractive pairs (IV for 4), not strings like IIII or VIIII.
  • Never repeat a symbol more than three times in a row. When a fourth would be needed, the subtractive form takes over.
  • Only I, X and C may be placed before a larger symbol to subtract, so XXIV never contains forms such as VX or LC.
  • Read XXIV as one number, not letter by letter: add the values left to right, except where a smaller symbol sits before a larger one.

Facts about the number 24

  • 24 is an even number and composite, with prime factors 23 x 3.
  • In binary 24 is 11000 and in hexadecimal it is 18.
  • Written out, 24 is "twenty-four".
  • The digits of 24 add up to 6, so it is divisible by 3.

Where you will see 24 in Roman numerals

Book volumes in extensive series sometimes print XXIV for the number 24 on their spines. Daylong events may use it for hourly schedules. Publishers apply this specific arrangement of letters to convey prestige and continuity, signaling to readers that the work belongs to a substantial and enduring collection.

Numbers near 24

NumberRoman numeral
22XXII
23XXIII
24XXIV
25XXV
26XXVI

FAQ

What is 24 in Roman numerals?

24 is written XXIV in Roman numerals. It is built from XX (20), IV (4).

How do you write 24 in lowercase Roman numerals?

Lowercase Roman numerals use the same rules, so 24 is xxiv. Lowercase is common for page numbers in a book's preface and for outline levels.

How do I convert any number to Roman numerals?

Split the number into thousands, hundreds, tens and ones, write each part with the symbols I, V, X, L, C, D and M, then join them from largest to smallest. Or paste it into the Roman numeral converter, which also converts back.

More roman numerals