免费罗马数字转换器

将阿拉伯数字即时转换为罗马数字，显示千位、百位、十位和个位的分解。

Number (1-3999)

Thousands Digit

Hundreds Digit0

Tens Digit2

Ones Digit4

查看公式 →

公式

Roman Numeral Converter

Roman Numeral Chart

DecimalRoman 1I 5V 10X 50L 100C 500D 1000M

Digit Mapping

Thousands: 1=M, 2=MM, 3=MMM

Hundreds: 1=C, 2=CC, 3=CCC, 4=CD, 5=D, 6=DC, 7=DCC, 8=DCCC, 9=CM

Tens: 1=X, 2=XX, 3=XXX, 4=XL, 5=L, 6=LX, 7=LXX, 8=LXXX, 9=XC

Ones: 1=I, 2=II, 3=III, 4=IV, 5=V, 6=VI, 7=VII, 8=VIII, 9=IX

Break down your number into digits and look up each group.

计算示例

Convert 2024 to Roman numerals.

01Thousands = 2 → MM
02Hundreds = 0 → (nothing)
03Tens = 2 → XX
04Ones = 4 → IV
05Result: MMXXIV

常见问题

What is the largest number in Roman numerals?

Standard Roman numerals can represent numbers from 1 to 3,999 (MMMCMXCIX). There is no standard symbol for 5,000 or higher in basic Roman numeral notation.

How do subtractive pairs work in Roman numerals?

When a smaller numeral appears before a larger one, you subtract: IV=4, IX=9, XL=40, XC=90, CD=400, CM=900.

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