محول الأرقام الرومانية

Convert numbers to Roman numerals and Roman numerals to numbers, from 1 to 3,999 (3,999,999 with overlines), with the standard form of any numeral.

آخر تحديث 28 سبتمبر 2026أمثلة تم التحقق منها: 8

النتيجة

MMXXVI

القيمة: 2,026

2,026 is MMXXVI: MM = 2,000, XX = 20, VI = 6.

MMXXVI by place value

طريقة الحساب S

Split into place values
$2026 = 2000 + 20 + 6$
Write each place value
$2000 \to \text{MM},\quad 20 \to \text{XX},\quad 6 \to \text{VI}$
4s and 9s use subtraction: IV, IX, XL, XC, CD, CM.
Join the symbols
$2026 = \text{MMXXVI}$

حول محول الأرقام الرومانية

Roman numerals write numbers with seven letters: I = 1, V = 5, X = 10, L = 50, C = 100, D = 500 and M = 1000. To convert a number, the converter splits it into thousands, hundreds, tens and ones and writes each place separately; a 4 or 9 puts a smaller letter before a larger one, so 40 is XL and 900 is CM. To read a numeral, it adds the letters from left to right and subtracts any letter that stands before a larger one.

The default, 2026, splits into 2000 + 20 + 6 and becomes MMXXVI. The usual uses are years on buildings and in film credits, clock faces, chapter numbers and outlines. Reading MCMXCIV gives 1000 + 900 + 90 + 4 = 1994.

Standard numerals stop at 3999 (MMMCMXCIX). With the overline option a bar multiplies letters by 1000, so V̅ = 5000, up to 3,999,999. Non-standard numerals such as IIII or IC are still read, and the standard spelling is shown next to the value.

أمثلة محلولة

2421

تحويل الوحدات: Number to Roman
Number: 2421

النتيجة: MMCDXXI
القيمة: 2,421

مصدر التحقق: ⁨Wikipedia — Roman numerals, standard-form examples (2421 = MMCDXXI); Python greedy conversion (forkA/verify_roman.py)⁩

1776 (Statue of Liberty tablet)

تحويل الوحدات: Number to Roman
Number: 1776

النتيجة: MDCCLXXVI

مصدر التحقق: ⁨Inscription JULY IV MDCCLXXVI on the Statue of Liberty's tablet; Python greedy conversion⁩

3999, the largest standard numeral (edge)

تحويل الوحدات: Number to Roman
Number: 3999

النتيجة: MMMCMXCIX

مصدر التحقق: ⁨Wikipedia — Roman numerals: MMMCMXCIX is the largest number in standard form; Excel ROMAN(3999)⁩

XLII to a number

تحويل الوحدات: Roman to number
Roman numeral: XLII

النتيجة: 42
القيمة: 42
Standard Roman form: XLII

مصدر التحقق: ⁨XL = 40, II = 2; Python parser (forkA/verify_roman.py)⁩

الأسئلة

What is 2026 in Roman numerals?

MMXXVI: MM = 2000, XX = 20 and VI = 6. Years are converted one place at a time, so 1999 is MCMXCIX (1000 + 900 + 90 + 9) rather than MIM, and 2000 is simply MM. The same rule gives MDCCLXXVI for 1776, the year inscribed on the tablet held by the Statue of Liberty.

What is the largest Roman numeral?

In standard form the largest number is 3999, written MMMCMXCIX, because there is no letter for 5000 and a letter repeats at most three times. Excel's ROMAN function returns #VALUE! above 3999 for the same reason. Larger numbers used an overline (vinculum) that multiplies by 1000: V̅ is 5000 and I̅V̅ is 4000, which takes this converter up to 3,999,999.

Is 4 written IV or IIII?

IV is the standard form; IIII is the additive form, and both mean 4. Standard form uses only six subtractive pairs: IV, IX, XL, XC, CD and CM. Many clock faces still show IIII for four o'clock while using IX for nine, a practice that goes back to clocks such as the late 14th-century Wells Cathedral clock. The converter reads IIII as 4 and gives IV as the standard spelling.

Why is 99 written XCIX and not IC?

Standard form lets a letter be subtracted only from the next two larger letters: I from V and X, X from L and C, and C from D and M. So 99 is 90 + 9 = XC + IX = XCIX, and 49 is XLIX rather than IL. Excel's ROMAN function breaks the rule only on request: its form 4 writes 499 as ID, while the default form gives CDXCIX.

Is there a Roman numeral for zero?

No. The Roman system had no symbol for zero, so the converter starts at 1. Medieval scholars wrote the Latin word nulla ("none") instead: Dionysius Exiguus used it in 525, and around 725 Bede or a colleague abbreviated it to the letter N.

ما مدى دقة «⁨محول الأرقام الرومانية⁩»؟

تعتمد الدقة على مدخلاتك وافتراضات الطريقة. يستخدم الحساب العشري 50 رقمًا معنويًا، لكن التقديرات والأساليب العددية وبيانات المصدر قد تكون أقل دقة؛ تقريب القيم المعروضة لا يزيل هذه الحدود. أمثلة محلولة جرى التحقق منها بمصادر مستقلة: 8. مثلًا، يجري التحقق من «⁨2421⁩» بالرجوع إلى ⁨Wikipedia — Roman numerals, standard-form examples (2421 = MMCDXXI); Python greedy conversion (forkA/verify_roman.py)⁩.

ما مصدر هذه الطريقة؟

Wikipedia — Roman numerals (standard form); Microsoft Excel ROMAN and ARABIC functions.

حول هذه الحاسبة

\begin{gathered}\text{I}=1,\ \text{V}=5,\ \text{X}=10,\ \text{L}=50,\ \text{C}=100,\ \text{D}=500,\ \text{M}=1000 \\ \text{a smaller symbol before a larger one is subtracted: IV} = 4,\ \text{XC} = 90\end{gathered}

المصادر

تم التحقق بالرجوع إلى المصادر

تتضمن هذه الحاسبة أمثلة محلولة بإجابات من مصادر مستقلة، وعددها 8. تُشغّل ضمن مجموعة الاختبارات، ويمكنك تشغيلها هنا أيضًا.