What are the 7 Roman numeral symbols?

The 7 basic Roman numeral symbols are: I = 1, V = 5, X = 10, L = 50, C = 100, D = 500, M = 1000. All other Roman numerals are built from combinations of these seven symbols using addition and subtraction rules.

How do subtractive Roman numerals work?

When a smaller Roman numeral symbol appears before a larger one, it is subtracted instead of added. The 6 subtractive combinations are: IV=4, IX=9, XL=40, XC=90, CD=400, CM=900. For example: IV = 5-1 = 4, and CM = 1000-100 = 900.

Roman Numeral Calculator — Convert Numbers To & From Roman Numerals

Q: What is CDLXXVII in Roman numerals?

CDLXXVII = 477. Breaking it down: CD = 400, L = 50, XX = 20, VII = 7. Total: 400 + 50 + 20 + 7 = 477.

Q: What is 2025 in Roman numerals?

2025 in Roman numerals is MMXXV. M = 1000, M = 1000, XX = 20, V = 5. Total: 1000 + 1000 + 20 + 5 = 2025.

Q: What is 2026 in Roman numerals?

2026 in Roman numerals is MMXXVI. M + M + XX + VI = 1000 + 1000 + 20 + 6 = 2026.

Q: What does C mean in Roman numerals?

C in Roman numerals equals 100. It comes from the Latin word 'centum' meaning hundred. C is one of the seven basic Roman numeral symbols: I=1, V=5, X=10, L=50, C=100, D=500, M=1000.

Q: What is 6 in Roman numerals?

6 in Roman numerals is VI. V = 5 and I = 1, so V + I = 6. Roman numerals add when a smaller value follows a larger value.

Q: What is 3 in Roman numerals?

3 in Roman numerals is III — three I symbols written in a row. I = 1, so I + I + I = 3.

The 7 Roman Numeral Symbols

All Roman numerals are built from these 7 basic symbols:

100

500

1,000

Common Conversions — Quick Reference

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Roman Numerals Reference Chart (1–100)

Number	Roman	Number	Roman	Number	Roman	Number	Roman

Key Large Roman Numerals

Number	Roman Numeral	Breakdown
100	C	C = 100
500	D	D = 500
1,000	M	M = 1,000
1,900	MCM	M(1000) + CM(900)
2,000	MM	M + M
2,024	MMXXIV	MM(2000) + XX(20) + IV(4)
2,025	MMXXV	MM(2000) + XX(20) + V(5)
2,026	MMXXVI	MM(2000) + XX(20) + VI(6)
2,100	MMC	MM(2000) + C(100)
3,000	MMM	M + M + M
3,999	MMMCMXCIX	MMM(3000)+CM(900)+XC(90)+IX(9) — largest standard Roman numeral

How to Read and Write Roman Numerals

Addition Rule

When symbols are placed from left to right in decreasing order, their values are added together:

VII = V + I + I = 5 + 1 + 1 = 7
LX = L + X = 50 + 10 = 60
MDCCC = 1000 + 500 + 100 + 100 + 100 = 1,800

Subtraction Rule

When a smaller symbol appears before a larger one, it is subtracted from the larger value. There are exactly 6 valid subtractive combinations:

Combination	Value	Memory Tip
IV	4	5 minus 1 (one before five)
IX	9	10 minus 1 (one before ten)
XL	40	50 minus 10 (ten before fifty)
XC	90	100 minus 10 (ten before hundred)
CD	400	500 minus 100 (hundred before five-hundred)
CM	900	1000 minus 100 (hundred before thousand)

The Rules of Repetition

I, X, C, and M can be repeated up to 3 times in a row (e.g., III = 3, XXX = 30, CCC = 300, MMM = 3,000)
V, L, and D cannot be repeated — they appear only once
Standard Roman numerals only go up to 3,999 (MMMCMXCIX)

Decoding CDLXXVII step by step: CD = 400, L = 50, XX = 20, VII = 7. Total: 400 + 50 + 20 + 7 = 477. CDLXXVII = 477.

How to Convert a Number to Roman Numerals

Start with the largest Roman numeral symbol that fits.
Subtract its value from the number and write down the symbol.
Repeat until you reach zero.

Example — Convert 1,994 to Roman numerals:
1994 − 1000 = 994 → write M
994 − 900 = 94 → write CM
94 − 90 = 4 → write XC
4 − 4 = 0 → write IV
Result: MCMXCIV

Where Roman Numerals Are Used Today

Clocks and watches — clock faces often use Roman numerals (IV or IIII for 4)
Movie sequels and Super Bowls — Super Bowl LVII, Rocky IV, Star Wars Episode IX
Copyright years — MMXXVI appears in film credits for 2026
Book chapters and outlines — Chapter I, Part II, Section III
Monarchs and popes — King Charles III, Pope John Paul II
Building foundations — cornerstones often show the year in Roman numerals
Medical prescriptions — some dosage instructions still use Roman numerals

Frequently Asked Questions

What is CDLXXVII in Roman numerals?

CDLXXVII = 477. Breakdown: CD (400) + L (50) + XX (20) + VII (7) = 477.

CD = 500−100 = 400. L = 50. XX = 10+10 = 20. VII = 5+1+1 = 7. Total = 477.

What is 2025 in Roman numerals?

2025 = MMXXV. MM = 2000, XX = 20, V = 5. Total: 2000+20+5 = 2025.

What is 2026 in Roman numerals?

2026 = MMXXVI. MM = 2000, XX = 20, VI = 6. Total: 2000+20+6 = 2026.

What does C mean in Roman numerals?

C = 100. It comes from the Latin word "centum" (meaning hundred). C is one of the 7 basic symbols: I=1, V=5, X=10, L=50, C=100, D=500, M=1000.

What is 6 in Roman numerals?

6 = VI. V (5) + I (1) = 6. In Roman numerals, when a smaller symbol follows a larger one, the values are added.

What is 3 in Roman numerals?

3 = III. Three I symbols in a row: 1 + 1 + 1 = 3. The letter I can be repeated up to three times consecutively.

Why can't Roman numerals go above 3,999?

In the standard system, M (1,000) can only be repeated 3 times (MMM = 3,000), and CM (900) is the largest single subtraction. So the maximum is MMM + CM + XC + IX = 3,000 + 900 + 90 + 9 = 3,999 (MMMCMXCIX). Historical extensions used a bar over a symbol to multiply by 1,000, but this is not part of the standard system.

What is 4 in Roman numerals — IV or IIII?

The standard modern form is IV (4 = 5−1). However, IIII appears on many clock faces, especially traditional ones. This is because clock designers historically preferred symmetry (IIII mirrors VIII on the opposite side) and to avoid confusion with the "IV" abbreviation for Jupiter (Iuppiter) in ancient times.

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