64 in Roman Numerals
Sixty-four is written LXIV in Roman numerals. It uses the subtractive rule, where a smaller glyph placed before a larger one is taken away rather than added, which keeps the numeral short and is the part most people find fiddly.
How LXIV is formed
Reading left to right, 64 breaks into these additive parts. Each Roman symbol is added in turn to reach the total.
L + X + IV = 50 + 10 + 4 = 64.
Where 64 in Roman numerals is used
- Outlines, exam questions and list items in formal documents.
- Monarch and pope names, for example the 64th of a royal line.
Good to know about 64
- Sixty-four, LXIV, is the number of squares on a chessboard.
Convert another number
64 is written LXIV in Roman numerals.
Frequently asked questions
How do you write 64 in Roman numerals?
Write 64 as LXIV, combining L + X + IV. Start from the largest value that fits and work down until nothing is left over.
Why is 64 not written LXIIII?
LXIV uses the subtractive rule: a smaller symbol placed before a larger one is taken away, so you never repeat a symbol four times. LXIIII breaks that rule, which is why LXIV is the only correct form.
What are 63 and 65 in Roman numerals?
63 is LXIII and 65 is LXV. Neighbouring numbers often change length in surprising ways, which is why each has its own page.
How is LXIV broken down?
LXIV breaks down as L (50), X (10), IV (4), so L + X + IV = 50 + 10 + 4 = 64.