1945 in Roman Numerals
1945 is MCMXLV, the year the Second World War ended. The final stretch, XLV, uses the subtractive rule twice over: XL for forty, V for five.
How MCMXLV is formed
M + CM + XL + V = 1000 + 900 + 40 + 5 = 1945.
Where MCMXLV is used
A year numeral turns up in different places from a bare number. These are the four that send people looking for MCMXLV.
- Date tattoos and engravings. A year-only piece is just MCMXLV, and a full date stacks the day and month above it. MCMXLV is 6 characters long, which matters more than people expect: it sets how wide the bottom line of a stacked date will sit.
- Copyright lines in credits. Film and television end credits have long set the copyright year in Roman numerals, so a production from 1945 carries MCMXLV on its end card. If you are reading a numeral off a title sequence rather than writing one, this is usually the one you have found.
- Cornerstones and dedications. Buildings, monuments and foundation stones carry their year in numerals, which is why MCMXLV turns up carved rather than typed. Every year between 1900 and 1999 opens with MCM, so on a datestone it is the letters after MCM that tell you which year you are actually looking at.
- Anniversaries. In 2026, a date from 1945 is 81 years old, so MCMXLV is the numeral for a 81st anniversary this year. Wedding and birth years are the two most common reasons to want MCMXLV written correctly.
1945 in history
1945 is the year the Second World War ended, one of the most engraved years on war memorials worldwide.
Convert another year or number
1945 is written MCMXLV in Roman numerals.
Frequently asked questions
How do you write the year 1945 in Roman numerals?
The year 1945 is written MCMXLV. Reading left to right that is M (1000) + CM (900) + XL (40) + V (5), added together to reach 1945.
What happened in 1945?
1945 is the year the Second World War ended, one of the most engraved years on war memorials worldwide. Written as a Roman numeral, 1945 is MCMXLV, which is the form you will see it carved or inked.
Why does MCMXLV start with MCM?
MCM is the numeral for 1900, and every year from 1900 to 1999 opens with it. The letters after it, XLV, carry the remaining 45.
Is MCMXLV the same as 1945 on a clock?
No. Clock faces only run to XII, so a year never appears on a dial. MCMXLV belongs on dates: credits, cornerstones, engravings and tattoos. A numeral read off a watch face is an hour between I and XII, not a year.
Years people look up next
The decade anchors either side of 1945, its immediate neighbours, and the quarter and half century marks that anniversaries land on.