Roman Alphabet Collection

This page includes a total of 52 Roman alphabet symbols, covering the basic uppercase and lowercase Latin letters. The Roman alphabet, also known as the Latin alphabet, is the most widely used writing system in the world, originating from the Latin script used by the ancient Romans. It forms the basis for most Western languages like English, French, German, and Spanish, and is also the foundation for Chinese Pinyin and the International Phonetic Alphabet. Each letter has specific written forms and pronunciations, indispensable in typography, programming, linguistics, and daily written communication. Below are the technical parameters and usage scenarios for each symbol in detail.

🔠 Uppercase Roman Letters A-Z

A is called the uppercase Latin letter A. It is the first letter of the Roman alphabet, often used to represent the highest grade, first place, or excellence. Its Unicode is U+0041, LaTeX command is A, HTML entity is A. In mathematics and physics, A is often used to represent amperes or vector points.

B is called the uppercase Latin letter B. It is the second letter of the Roman alphabet, often used to represent the second grade or second best. Its Unicode is U+0042, LaTeX command is B, HTML entity is B. In music, B represents a pitch name; in chemistry, it denotes the element Boron; in computing, it represents Byte.

C is called the uppercase Latin letter C. It is the third letter of the Roman alphabet. In Roman numerals, it represents 100, often used to denote Century. Its Unicode is U+0043, LaTeX command is C, HTML entity is C. In physics, C often represents the speed of light; in music, it denotes the tonic of the C major scale; in chemistry, it represents Carbon.

D is called the uppercase Latin letter D. It is the fourth letter of the Roman alphabet. In Roman numerals, it represents 500. Its Unicode is U+0044, LaTeX command is D, HTML entity is D. In music, D represents the pitch D; in chemistry, it denotes Deuterium; in computer science, it's often used as the "D drive" designation.

E is called the uppercase Latin letter E. It is one of the most frequently used letters in the Roman alphabet, often used to represent Energy or East. Its Unicode is U+0045, LaTeX command is E, HTML entity is E. In mathematics, E often denotes expected value or the exponent in scientific notation.

F is called the uppercase Latin letter F. It is the sixth letter of the Roman alphabet, often used to represent Fahrenheit temperature. Its Unicode is U+0046, LaTeX command is F, HTML entity is F. In music, F represents the pitch F; in chemistry, it denotes Fluorine; in physics, it represents Force.

G is called the uppercase Latin letter G. It is the seventh letter of the Roman alphabet, the lowercase 'g' is a common symbol for gravitational acceleration. Its Unicode is U+0047, LaTeX command is G, HTML entity is G. In music, G represents the pitch G; in physics, it denotes the gravitational constant; in computer science, it represents Giga.

H is called the uppercase Latin letter H. It is the eighth letter of the Roman alphabet. In chemistry, it represents the element Hydrogen. Its Unicode is U+0048, LaTeX command is H, HTML entity is H. In physics, H denotes magnetic field strength or the Hamiltonian; in the SI system, it represents the Henry (unit of inductance).

I is called the uppercase Latin letter I. It is the ninth letter of the Roman alphabet. In Roman numerals, it represents 1. Its Unicode is U+0049, LaTeX command is I, HTML entity is I. In mathematics, I is often used to denote the imaginary unit or the identity matrix; electric current is also symbolized by I.

J is called the uppercase Latin letter J. It is the tenth letter of the Roman alphabet, a later addition derived from I. Its Unicode is U+004A, LaTeX command is J, HTML entity is J. In physics, J represents the Joule; in electrical engineering, it denotes current density; it is also an engineering representation for the imaginary unit.

K is called the uppercase Latin letter K. It is the eleventh letter of the Roman alphabet, often used to represent Kilo. Its Unicode is U+004B, LaTeX command is K, HTML entity is K. In chemistry, K represents Potassium; in thermodynamics, it denotes Kelvin; in computing, it represents Kilobyte (KB).

L is called the uppercase Latin letter L. It is the twelfth letter of the Roman alphabet. In Roman numerals, it represents 50. Its Unicode is U+004C, LaTeX command is L, HTML entity is L. In optics, L denotes Luminance; it is the international symbol for the liter; also the symbol for angular momentum.

M is called the uppercase Latin letter M. It is the thirteenth letter of the Roman alphabet. In Roman numerals, it represents 1000. Its Unicode is U+004D, LaTeX command is M, HTML entity is M. In the SI system, M represents Mega; in chemistry, it denotes molar concentration; in physics, it represents Mass.

N is called the uppercase Latin letter N. It is the fourteenth letter of the Roman alphabet, the symbol for Newton in physics. Its Unicode is U+004E, LaTeX command is N, HTML entity is N. In chemistry, N represents Nitrogen; in mathematics, N often denotes the set of natural numbers; its pronunciation is the /n/ sound.

O is called the uppercase Latin letter O. It is the fifteenth letter of the Roman alphabet, often representing Oxygen. Its Unicode is U+004F, LaTeX command is O, HTML entity is O. In mathematics, O is used for Big O notation to describe algorithm complexity; in chemistry, it represents the element Oxygen.

P is called the uppercase Latin letter P. It is the sixteenth letter of the Roman alphabet. In chemistry, it represents the element Phosphorus. Its Unicode is U+0050, LaTeX command is P, HTML entity is P. In physics, P denotes Power or Momentum; in music, it indicates piano (soft); in probability, it represents a probability value.

Q is called the uppercase Latin letter Q. It is a less frequently used letter in the Roman alphabet, often associated with the word Question. Its Unicode is U+0051, LaTeX command is Q, HTML entity is Q. In thermodynamics, Q denotes Heat; in electrical engineering, it represents the Quantity of charge; in playing cards, it stands for Queen.

R is called the uppercase Latin letter R. It is the eighteenth letter of the Roman alphabet, often representing electrical resistance or the set of real numbers. Its Unicode is U+0052, LaTeX command is R, HTML entity is R. In chemistry, R is often used to denote an alkyl group, the gas constant in the ideal gas law, and a component of the registered trademark symbol.

S is called the uppercase Latin letter S. It is the nineteenth letter of the Roman alphabet, the symbol for the Second in physics. Its Unicode is U+0053, LaTeX command is S, HTML entity is S. In chemistry, S represents Sulfur; in geometry, it denotes Area; also the symbol for the Siemens (unit of electrical conductance).

T is called the uppercase Latin letter T. It is the twentieth letter of the Roman alphabet, the unit symbol for Tesla (magnetic flux density). Its Unicode is U+0054, LaTeX command is T, HTML entity is T. In SI prefixes, T represents Tera; in chemistry, it denotes Tritium; in music, a whole tone.

U is called the uppercase Latin letter U. It is the twenty-first letter of the Roman alphabet, sharing a common origin with V and W. Its Unicode is U+0055, LaTeX command is U, HTML entity is U. In chemistry, U represents Uranium; in physics, it denotes Internal Energy; also a symbol for voltage.

V is called the uppercase Latin letter V. It is the twenty-second letter of the Roman alphabet. In Roman numerals, it represents 5. Its Unicode is U+0056, LaTeX command is V, HTML entity is V. In physics, V denotes Volts and Voltage; in chemistry, it represents the element Vanadium; Volume is often denoted by V.

W is called the uppercase Latin letter W. It is the twenty-third letter of the Roman alphabet, derived from the double U/V. Its Unicode is U+0057, LaTeX command is W, HTML entity is W. In physics, W denotes Work or the Watt; in chemistry, it represents the element Tungsten (Wolfram); a source for the Cyrillic alphabet.

X is called the uppercase Latin letter X. It is the twenty-fourth letter of the Roman alphabet. In Roman numerals, it represents 10. Its Unicode is U+0058, LaTeX command is X, HTML entity is X. In mathematics, X is the most common symbol for an unknown quantity; in X-rays, it denotes the unknown ray; an X rating in films indicates adult content.

Y is called the uppercase Latin letter Y. It is the twenty-fifth letter of the Roman alphabet, derived from the Greek letter Υ (Upsilon). Its Unicode is U+0059, LaTeX command is Y, HTML entity is Y. In mathematics, Y is often used as the dependent variable; in chemistry, it denotes the element Yttrium; in genetics, it represents the male sex chromosome.

Z is called the uppercase Latin letter Z. It is the twenty-sixth and last letter of the Roman alphabet. Its Unicode is U+005A, LaTeX command is Z, HTML entity is Z. In mathematics, Z often denotes the set of integers; in physics, it represents the atomic number and the symbol for impedance; in chemistry, it denotes the atomic number.

🔡 Lowercase Roman Letters a-z

a is called the lowercase Latin letter a. It is the first letter of the lowercase alphabet. Its Unicode is U+0061, LaTeX command is a, HTML entity is a. In the SI system, a denotes atto (10⁻¹⁸); in physics, it denotes acceleration; it is the most common letter in the English language.

b is called the lowercase Latin letter b. It is the second letter of the lowercase alphabet. Its Unicode is U+0062, LaTeX command is b, HTML entity is b. In music, b denotes a flat sign; in computer science, it represents a bit; in physics constants, it denotes the Wien displacement constant.

c is called the lowercase Latin letter c. It is the third letter of the lowercase alphabet. Its Unicode is U+0063, LaTeX command is c, HTML entity is c. In physics, c is the symbol for the speed of light; in the SI system, it denotes centi (10⁻²); in music, it denotes the time signature for common time.

d is called the lowercase Latin letter d. It is the fourth letter of the lowercase alphabet. Its Unicode is U+0064, LaTeX command is d, HTML entity is d. In calculus, d is the prefix for the differential operator; in chemistry, it denotes Deuterium; in the SI system, it denotes deci (10⁻¹).

e is called the lowercase Latin letter e. It is the fifth letter of the lowercase alphabet, and the symbol for the base of the natural logarithm. Its Unicode is U+0065, LaTeX command is e, HTML entity is e. In mathematics, e is Euler's number (approx. 2.71828); in physics, it denotes elementary charge; also the exponent symbol in scientific notation.

f is called the lowercase Latin letter f. It is the sixth letter of the lowercase alphabet. Its Unicode is U+0066, LaTeX command is f, HTML entity is f. In mathematics, f is often used to denote a function; in physics, it denotes frequency; in the SI system, it denotes femto (10⁻¹⁵).

g is called the lowercase Latin letter g. It is the seventh letter of the lowercase alphabet. Its Unicode is U+0067, LaTeX command is g, HTML entity is g. In physics, g is the acceleration due to gravity (approx. 9.8 m/s²); in the SI system, it denotes the gram; in music, it denotes the tonic of the G major scale.

h is called the lowercase Latin letter h. It is the eighth letter of the lowercase alphabet. Its Unicode is U+0068, LaTeX command is h, HTML entity is h. In physics, h is the Planck constant; in the SI system, it denotes hecto (10²); in time units, it denotes the hour.

i is called the lowercase Latin letter i. It is the ninth letter of the lowercase alphabet. Its Unicode is U+0069, LaTeX command is i, HTML entity is i. In mathematics, i is the imaginary unit (√-1); commonly used as a loop counter; in physics, it denotes electric current (Intensity).

j is called the lowercase Latin letter j. It is the tenth letter of the lowercase alphabet. Its Unicode is U+006A, LaTeX command is j, HTML entity is j. In engineering mathematics, j is often used as the imaginary unit (to avoid confusion with current i); in physics, it denotes current density; also a unit vector in the jy direction.

k is called the lowercase Latin letter k. It is the eleventh letter of the lowercase alphabet. Its Unicode is U+006B, LaTeX command is k, HTML entity is k. In the SI system, k denotes kilo (10³); in physics, it denotes the Boltzmann constant and the spring constant (stiffness coefficient).

l is called the lowercase Latin letter l. It is the twelfth letter of the lowercase alphabet. Its Unicode is U+006C, LaTeX command is l, HTML entity is l. In the SI system, l is the symbol for the liter; in physics, it denotes angular momentum or length; in Roman numerals, it represents 50.

m is called the lowercase Latin letter m. It is the thirteenth letter of the lowercase alphabet. Its Unicode is U+006D, LaTeX command is m, HTML entity is m. In the SI system, m is the symbol for the meter and milli (10⁻³); in physics, it denotes mass; slope is often denoted by m.

n is called the lowercase Latin letter n. It is the fourteenth letter of the lowercase alphabet. Its Unicode is U+006E, LaTeX command is n, HTML entity is n. In the SI system, n denotes nano (10⁻⁹); in mathematics, n is often used to denote a natural number or number of terms in a sequence; in chemistry, it denotes amount of substance.

o is called the lowercase Latin letter o. It is the fifteenth letter of the lowercase alphabet. Its Unicode is U+006F, LaTeX command is o, HTML entity is o. In the SI system, o is not used as a prefix, but it's a component of the atomic symbol for Oxygen (O); in mathematics, it can represent zero or a circle.

p is called the lowercase Latin letter p. It is the sixteenth letter of the lowercase alphabet. Its Unicode is U+0070, LaTeX command is p, HTML entity is p. In the SI system, p denotes pico (10⁻¹²); in physics, it denotes momentum or pressure; in chemistry, it represents the element Phosphorus.

q is called the lowercase Latin letter q. It is the seventeenth letter of the lowercase alphabet. Its Unicode is U+0071, LaTeX command is q, HTML entity is q. In physics, q is often used to denote the quantity of charge; in mathematics, it is often used as a function variable; also the symbol for quantile in statistics.

r is called the lowercase Latin letter r. It is the eighteenth letter of the lowercase alphabet. Its Unicode is U+0072, LaTeX command is r, HTML entity is r. In geometry, r denotes the radius; in the SI system, it denotes the rem (radiation dose); in statistics, it denotes the correlation coefficient.

s is called the lowercase Latin letter s. It is the nineteenth letter of the lowercase alphabet. Its Unicode is U+0073, LaTeX command is s, HTML entity is s. In the SI system, s denotes the second; in geometry, it denotes distance or area; also the symbol for the Siemens (unit of electrical conductance).

t is called the lowercase Latin letter t. It is the twentieth letter of the lowercase alphabet. Its Unicode is U+0074, LaTeX command is t, HTML entity is t. In the SI system, t denotes tonne or time; it's the namesake for Student's t-test; also a symbol for temperature in thermodynamics.

u is called the lowercase Latin letter u. It is the twenty-first letter of the lowercase alphabet. Its Unicode is U+0075, LaTeX command is u, HTML entity is u. In physics, u denotes the unified atomic mass unit; also a symbol for velocity; in SI prefixes, an alternative for micro (standard is μ).

v is called the lowercase Latin letter v. It is the twenty-second letter of the lowercase alphabet. Its Unicode is U+0076, LaTeX command is v, HTML entity is v. In physics, v denotes velocity or voltage; in Roman numerals, it is the symbol for 5; in chemistry, it denotes the element Vanadium.

w is called the lowercase Latin letter w. It is the twenty-third letter of the lowercase alphabet. Its Unicode is U+0077, LaTeX command is w, HTML entity is w. In physics, w is an alternative symbol for angular frequency; also the symbol for work; in engineering, it denotes width.

x is called the lowercase Latin letter x. It is the twenty-fourth letter of the lowercase alphabet. Its Unicode is U+0078, LaTeX command is x, HTML entity is x. In mathematics, x is the most common symbol for an unknown variable, almost ubiquitous in algebra; in geometry, it denotes the x-coordinate; an X rating in films indicates adult content.

y is called the lowercase Latin letter y. It is the twenty-fifth letter of the lowercase alphabet. Its Unicode is U+0079, LaTeX command is y, HTML entity is y. In mathematics, y is often used as the dependent variable (function value), paired with x; in coordinate systems, it denotes the y-coordinate; in genetics, it denotes the male sex chromosome Y.

z is called the lowercase Latin letter z. It is the twenty-sixth letter of the lowercase alphabet. Its Unicode is U+007A, LaTeX command is z, HTML entity is z. In mathematics, z is often used to denote a complex variable, the third dimension in 3D coordinates; in statistics, the Z-score; also a common symbol for atomic number.

📌 Important Notes on Using the Roman Alphabet

There are several key points to keep in mind when using the Roman alphabet: First, uppercase and lowercase letters have different meanings in various contexts; for example, 'a' and 'A' might denote acceleration and amperes respectively in mathematics. Second, letters can be typed directly in LaTeX for correct rendering, but superscripts and subscripts require the ^ and _ symbols, e.g., $a^2$ for a squared. Third, for HTML entities, the letters themselves can be used directly without special escaping. Fourth, in some fonts, the letter 'l' can be difficult to distinguish from the number '1'; it is recommended to use monospaced fonts like Consolas or Courier New in programming and financial scenarios. Fifth, the Roman alphabet consists of basic characters that are internationally supported and displayable on almost all modern devices and systems. Sixth, when copying SVG source code or downloading PNGs, the generated graphics will render based on the selected font; using the system's default sans-serif font is recommended for compatibility. Seventh, for variable letters in mathematical formulas, italic rendering (automatically achieved in LaTeX math mode) is recommended to distinguish them from regular text. Eighth, the Unicode range for the Roman alphabet is U+0041 to U+005A for uppercase and U+0061 to U+007A for lowercase, with extended Latin blocks for special language characters. Paying attention to these points will help you use the Roman alphabet correctly in different scenarios, enhancing the professionalism and readability of your documents.

💡 Usage Tips

If you need to copy a Roman letter's Unicode, LaTeX command, or HTML entity, simply click the corresponding symbol card above, then click the desired item in the details panel that appears to copy it with one click. Each symbol can generate SVG vector source code, convenient for use in presentations, design drafts, or teaching materials. When writing academic papers or programming documentation, it is recommended to use LaTeX with math mode for the best typesetting results. Especially for complex formulas containing variables, LaTeX ensures precise symbol rendering.