English Alphabet Chart

This page includes 52 letters, covering all 26 Latin letters used in modern English. The English alphabet is one of the most widely used writing systems in the world today, derived from the Latin alphabet. It serves not only as the cornerstone of the English language but has also been adopted or adapted by numerous other languages. Each letter carries specific phonetic and textual functions. Below is a detailed introduction to each letter's technical parameters and usage scenarios by category.

🔠 Uppercase Letters

A is called letter A, the first letter of the English alphabet. Commonly used at the beginning of words or in abbreviations. Its Unicode is U+0041. In LaTeX, simply type A. HTML typically uses the character directly without an entity. B is called letter B, the second letter. Often used to denote second grade or the element boron. Its Unicode is U+0042. Sometimes used as a constant in mathematics. C is called letter C, the third letter. Commonly represents carbon or the Roman numeral 100. Its Unicode is U+0043. Widely used in programming languages. D is called letter D, the fourth letter. Often represents the Roman numeral 500 or a musical note. Its Unicode is U+0044. E is called letter E, the fifth letter and the most frequently occurring letter in English. Its Unicode is U+0045. In mathematics, often denotes expected value or scientific notation. F is called letter F, the sixth letter. Commonly represents a failing grade or force. Its Unicode is U+0046. G is called letter G, the seventh letter. Often represents gravity or giga. Its Unicode is U+0047. H is called letter H, the eighth letter. Commonly represents hydrogen or height. Its Unicode is U+0048. I is called letter I, the ninth letter. Often represents the self, electric current, or the Roman numeral 1. Its Unicode is U+0049. Be careful not to confuse it with the number 1. J is called letter J, the tenth letter. Commonly represents joule or the imaginary unit. Its Unicode is U+004A. K is called letter K, the eleventh letter. Often represents potassium or kilo. Its Unicode is U+004B. L is called letter L, the twelfth letter. Commonly represents liter or the Roman numeral 50. Its Unicode is U+004C. M is called letter M, the thirteenth letter. Often represents meter or the Roman numeral 1000. Its Unicode is U+004D. N is called letter N, the fourteenth letter. Commonly represents newton or nitrogen. Its Unicode is U+004E. O is called letter O, the fifteenth letter. Often represents oxygen or a substitute for zero. Its Unicode is U+004F. Be careful not to confuse it with the number 0. P is called letter P, the sixteenth letter. Commonly represents phosphorus or probability. Its Unicode is U+0050. Q is called letter Q, the seventeenth letter. Often represents heat or electric charge. Its Unicode is U+0051. R is called letter R, the eighteenth letter. Commonly represents resistance or radius. Its Unicode is U+0052. S is called letter S, the nineteenth letter. Often represents sulfur or second. Its Unicode is U+0053. T is called letter T, the twentieth letter. Commonly represents ton or tesla. Its Unicode is U+0054. U is called letter U, the twenty-first letter. Often represents uranium or voltage. Its Unicode is U+0055. V is called letter V, the twenty-second letter. Commonly represents vanadium or the Roman numeral 5. Its Unicode is U+0056. W is called letter W, the twenty-third letter. Often represents watt or width. Its Unicode is U+0057. X is called letter X, the twenty-fourth letter. Commonly represents an unknown variable or the Roman numeral 10. Its Unicode is U+0058. Y is called letter Y, the twenty-fifth letter. Often represents yttrium or the ordinate. Its Unicode is U+0059. Z is called letter Z, the twenty-sixth letter. Commonly represents zinc or a complex variable. Its Unicode is U+005A.

🔡 Lowercase Letters

a is called lowercase a, the most frequently used lowercase letter. Commonly used in words and mathematical variables. Its Unicode is U+0061. Simply type a in LaTeX. b is called lowercase b. Often used to represent a variable or base. Its Unicode is U+0062. c is called lowercase c. Commonly represents the speed of light or a constant. Its Unicode is U+0063. d is called lowercase d. Often represents a differential symbol or distance. Its Unicode is U+0064. e is called lowercase e. In mathematics, represents the natural constant. Its Unicode is U+0065. A core symbol in scientific computation. f is called lowercase f. Commonly represents frequency or function. Its Unicode is U+0066. g is called lowercase g. Often represents gravitational acceleration. Its Unicode is U+0067. h is called lowercase h. Commonly represents Planck's constant. Its Unicode is U+0068. i is called lowercase i. Often represents the imaginary unit or an index. Its Unicode is U+0069. Note that in mathematics, the imaginary unit is sometimes written as an upright i. j is called lowercase j. Commonly represents current density or a second index. Its Unicode is U+006A. k is called lowercase k. Often represents kilo or wavenumber. Its Unicode is U+006B. l is called lowercase l. Commonly represents length or liter. Its Unicode is U+006C. Easily confused with the number 1—use different names in code. m is called lowercase m. Often represents mass or meter. Its Unicode is U+006D. n is called lowercase n. Commonly represents quantity or refractive index. Its Unicode is U+006E. o is called lowercase o. Often represents the origin or a lowercase circle. Its Unicode is U+006F. Distinguish from the number 0, especially in programming. p is called lowercase p. Commonly represents momentum or probability. Its Unicode is U+0070. q is called lowercase q. Often represents electric charge or heat flux. Its Unicode is U+0071. r is called lowercase r. Commonly represents radius or resistivity. Its Unicode is U+0072. s is called lowercase s. Often represents second or displacement. Its Unicode is U+0073. t is called lowercase t. Commonly represents time or ton. Its Unicode is U+0074. u is called lowercase u. Often represents velocity or atomic mass unit. Its Unicode is U+0075. v is called lowercase v. Commonly represents velocity or volume. Its Unicode is U+0076. w is called lowercase w. Often represents width or watt. Its Unicode is U+0077. x is called lowercase x, the most commonly used symbol for an unknown variable in mathematics. Its Unicode is U+0078. y is called lowercase y. Commonly represents the ordinate or a dependent variable. Its Unicode is U+0079. z is called lowercase z. Often represents a complex variable or the third-dimensional coordinate. Its Unicode is U+007A.

📌 Usage Notes for English Letters

When using English letters, several key points need attention. First, uppercase and lowercase letters are completely independent code points in Unicode—A is U+0041 while a is U+0061; they cannot be used interchangeably. Second, some lowercase letters (such as l and o) are easily confused with the numbers 1 and 0. In scenarios requiring strict differentiation (such as programming or passwords), it is recommended to use monospaced fonts or clearly annotate them. Third, in LaTeX, English letters default to italic in math mode; use the \mathrm{} command for upright text, while in text mode simply type them directly. Fourth, in HTML, English letters typically do not require entities and can be typed directly. However, if encoding issues need to be avoided, numeric entities corresponding to ASCII values can be used. Fifth, English letters form the basis of words, but in applications such as sorting or encryption, attention should be paid to their encoding order. Sixth, although basic Latin letters display correctly in almost all fonts, different font styles (such as serif and sans-serif) affect visual recognition, especially in design, where careful selection is needed. Seventh, when generating SVG or PNG graphics, the display of English letters depends entirely on system font rendering; ensure universal font selection for cross-platform consistency. These notes will help you use English letters correctly in various scenarios, improving the accuracy and readability of documents and code.

💡 Usage Tips

If you need to copy the Unicode, LaTeX command, or HTML entity of an English letter, simply click the corresponding letter card above. In the pop-up detail panel, click the relevant item to copy it with one click. Each letter can generate SVG vector source code or be downloaded as a 512×512 pixel transparent PNG image, convenient for use in presentations, design drafts, or teaching materials. When writing scientific documents or handling internationalization in programming, it is recommended to use standard keyboard characters directly without relying on HTML entities for optimal compatibility.