Home › Text Tools › Letter to Number Converter
Letter to Number Converter
Convert any text into numbers using alphabet positions (A=1, B=2 … Z=26), or decode a string of numbers back into letters. Switch to A=0, a reversed alphabet or ASCII codes, choose the separator and see the total value of each word.
Last updated:
Direction
Enter your values to see the result.
Advertisement
Advertisement
How to use the Letter to Number Converter
- Choose the direction: letters to numbers or numbers to letters.
- Type or paste your text or the numbers to decode (use a slash between words).
- Pick the number system: A=1, A=0, reversed or ASCII codes.
- Click Convert; results also update as you type.
- Copy the result or read the letter sum and per-word totals.
Alphabet number chart
| Letter | A=1 | A=0 | Reversed | ASCII (upper) | ASCII (lower) | Letter | A=1 | A=0 | Reversed | ASCII (upper) | ASCII (lower) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | 1 | 0 | 26 | 65 | 97 | N | 14 | 13 | 13 | 78 | 110 |
| B | 2 | 1 | 25 | 66 | 98 | O | 15 | 14 | 12 | 79 | 111 |
| C | 3 | 2 | 24 | 67 | 99 | P | 16 | 15 | 11 | 80 | 112 |
| D | 4 | 3 | 23 | 68 | 100 | Q | 17 | 16 | 10 | 81 | 113 |
| E | 5 | 4 | 22 | 69 | 101 | R | 18 | 17 | 9 | 82 | 114 |
| F | 6 | 5 | 21 | 70 | 102 | S | 19 | 18 | 8 | 83 | 115 |
| G | 7 | 6 | 20 | 71 | 103 | T | 20 | 19 | 7 | 84 | 116 |
| H | 8 | 7 | 19 | 72 | 104 | U | 21 | 20 | 6 | 85 | 117 |
| I | 9 | 8 | 18 | 73 | 105 | V | 22 | 21 | 5 | 86 | 118 |
| J | 10 | 9 | 17 | 74 | 106 | W | 23 | 22 | 4 | 87 | 119 |
| K | 11 | 10 | 16 | 75 | 107 | X | 24 | 23 | 3 | 88 | 120 |
| L | 12 | 11 | 15 | 76 | 108 | Y | 25 | 24 | 2 | 89 | 121 |
| M | 13 | 12 | 14 | 77 | 109 | Z | 26 | 25 | 1 | 90 | 122 |
How the conversion works
For the A=1 system the number is the letter's ASCII code minus 64 (upper case) or minus 96 (lower case): H = 72 − 64 = 8. For A=0 subtract one more, and for the reversed alphabet use 27 minus the A=1 value. The letter sum always uses A=1 … Z=26, the most common convention for word-value puzzles.
Frequently asked questions
What is the A1Z26 cipher?
A1Z26 is the simple substitution in which each letter is replaced by its position in the alphabet: A=1, B=2 … Z=26. HELLO becomes 8 5 12 12 15. It is popular in puzzles, escape rooms and kids' secret codes, but provides no real security.
How do I find the sum of the letters in a word?
Add the alphabet positions of every letter. For example CAT = 3 + 1 + 20 = 24. The tool shows the total for the whole text and for each word.
What is the difference between A=1 and ASCII codes?
A=1 numbers only the 26 letters, so upper and lower case give the same number. ASCII (and Unicode) gives every character its own code: A = 65, a = 97, space = 32, ! = 33.
How do I decode numbers back to letters?
Choose Numbers → Letters, pick the same system that was used to encode, and paste the numbers separated by spaces, commas or dashes. Put a slash or a double space between words.
What is the reversed alphabet code?
It numbers the alphabet backwards: A=26, B=25 … Z=1. Combined with A=1 it gives the letter's position counted from the end; in letter form it is the Atbash cipher.
Why do some numbers show as a question mark?
In the alphabet systems only 1-26 (or 0-25) correspond to letters. Numbers outside that range, or tokens that are not numbers, cannot be decoded and are marked with ?.
Are all the tools on FreeToolCabin tested for quality and accuracy?
Yes! Every tool on our site undergoes automated Q/A testing in real browser environments to ensure high precision, correct output, and zero errors. If you happen to spot a bug or have a suggestion, please contact us at [email protected] and our team will review it right away.
Related tools
Caesar CipherEncode and decode Caesar shift ciphers and crack unknown shifts with a ranked brute force.Atbash CipherEncode and decode Atbash ciphers (A↔Z, B↔Y) in Latin or Hebrew, with a live letter mapping table.Letter Frequency CounterCount how often each letter appears, compare with English frequencies and see top bigrams.ASCII TableFull ASCII code chart 0–255 in decimal, hex, octal, binary and HTML, with search and copy.Polybius Square CipherEncode and decode Polybius square coordinates with a standard or keyword 5×5 or 6×6 grid.Online Word ProcessorFree browser word processor with headings, lists, tables and images. Autosaves; export DOCX or PDF.Remove Line BreaksStrip line breaks and extra spaces, keep paragraphs if you want.Sort Lines AlphabeticallySort a list A-Z, Z-A, numerically, naturally or by length, or shuffle it.Case ConverterConvert text to UPPERCASE, lowercase, Title Case, camelCase and more.MLA Format GeneratorBuild an MLA 9 heading, title page layout and Works Cited entries.Lorem Ipsum GeneratorGenerate placeholder text as paragraphs, words or lists, with HTML.Text RepeaterRepeat any text or emoji up to 100,000 times with custom separators.Find and Replace TextFind and replace words or regex patterns in any text, with match highlighting and undo.Add Line NumbersNumber every line of your text with custom start, step, padding and separator, or remove numbers.Add Prefix and Suffix to LinesAdd text to the start and end of every line: quotes, commas, bullets or SQL lists.Comma SeparatorTurn a column of lines into a comma separated list and back, with any delimiter.Text to Handwriting ConverterTurn typed text into realistic handwriting on notebook paper and save it as PNG or PDF.Japanese Kana ConverterConvert romaji to hiragana or katakana, kana to romaji, and hiragana to katakana instantly.Pinyin Tone ConverterTurn pinyin tone numbers (ni3 hao3) into tone marks (nǐ hǎo), or tone marks back into numbers.Remove Duplicate LinesDelete duplicate lines from any list, ignoring case or spaces, keep first or last, and sort.Remove Extra SpacesClean up double spaces, tabs, blank lines, non-breaking and invisible spaces in one click.Random Word GeneratorGenerate random English words by type, length, first letter and syllables, then copy them.List RandomizerShuffle a list into random order, pick random items or split it into fair teams.Email ExtractorPull every unique email address out of text or files, sort, filter by domain and export CSV.URL ExtractorExtract every link from text or HTML, remove duplicates, filter by domain or protocol.Strip HTML TagsRemove HTML tags and get clean plain text with line breaks and decoded entities.Online NotepadPrivate notepad that autosaves notes in your browser, with find, word count and .txt download.Remove PunctuationStrip all or only selected punctuation from text, with smart options for apostrophes and numbers.Text SplitterSplit long text into chunks by characters, words, lines or a delimiter, with numbering and copy.Remove AccentsStrip accents and diacritics from text (é→e, ñ→n, ß→ss, ø→o) instantly, live as you type.Sort NumbersPull numbers out of any text and sort them ascending or descending, with sum, average and median.Thread SplitterSplit long text into numbered X, Threads, Bluesky or Mastodon posts at sentence boundaries.Duplicate Word FinderFind repeated words in your text: doubled words like "the the" and overused words, highlighted.Alternating Caps GeneratorTurn text into aLtErNaTiNg caps, random caps or alternating words, then copy it.Random Paragraph GeneratorGenerate readable random English paragraphs by topic and length for writing and design.Random Sentence GeneratorGenerate random grammatical sentences: simple, compound, complex and questions.Markdown to Plain TextStrip Markdown syntax and keep clean plain text with lists, line breaks and link URLs.SRT to TextTurn SRT or VTT subtitles into a clean transcript with paragraphs, with or without timestamps.Recipe Shopping List GeneratorPaste several recipes and get one combined grocery list with merged amounts, by store section.One Word Per LineSplit any text into a list with one word per line; strip punctuation, dedupe, lowercase and sort.Recipe FormatterPaste a messy recipe and get clean ingredients, numbered steps, scaling and a printable card.Remove Words from TextDelete a list of words or phrases from any text and see how many times each one was removed.Reverse Line OrderFlip the order of lines, list items or paragraphs so the last becomes first.Pairwise Sequence Alignment ToolAlign two DNA or protein sequences, global (Needleman-Wunsch) or local (Smith-Waterman), with identity %.Sort Lines by LengthSort lines from shortest to longest or the reverse, with ties sorted A-Z and lengths shown.Sort Words AlphabeticallyPut the words in any text in A-Z or Z-A order, remove duplicates and pick a separator.Sentence SplitterSplit text into one sentence per line, smart about abbreviations, decimals and quotes.Text to Table ConverterTurn tab, comma, pipe or space separated text into a table to copy as rich text, Markdown or plain text.Text TruncatorShorten text to a character, word or sentence limit without cutting words, with an ellipsis.Bulk Find and ReplaceApply a whole list of find → replace pairs to your text at once, with a per-pair change log.Contraction ConverterExpand contractions (don't → do not) for formal writing or contract phrases for a casual tone.Count Duplicate LinesCount how many times each line appears, sorted by frequency, with duplicates-only and CSV export.Double Space TextAdd blank lines between lines or paragraphs (1.5, double, triple spacing) or remove them again.Em Dash ReplacerReplace em and en dashes with commas, hyphens or periods and normalize ellipses and fancy punctuation.Extract Domains from URLsPull hostnames or root domains out of URL lists, strip www, dedupe and count links per domain.List to Sentence ConverterTurn a list into a natural sentence with commas and “and” or “or”, with an Oxford comma toggle.Merge Lines Side by SideCombine two to four lists line by line with any separator, padding or filling uneven lengths.Remove Line NumbersStrip leading numbers like 1., 1), [1] or code line numbers from every line and keep the text.Remove Stop WordsStrip common stop words (the, and, of…) from text in 7 languages to reveal the keywords.Remove Text in BracketsDelete everything inside ( ), [ ], { }, < > or custom markers, with nested bracket support.Remove URLs from TextStrip links, www addresses and bare domains from text, plus emails, @mentions or hashtags.Trim Characters from LinesRemove the first or last N characters, or text before/after a marker, on every line.Transcript CleanerRemove timestamps, speaker labels and filler words like um and uh, and fix broken line breaks.Extract Numbers from TextPull every number out of text: decimals, negatives and percentages, with sum, average and CSV.Extract Phone NumbersFind phone numbers in any text, normalize them to E.164, remove duplicates and export CSV.Paragraph to Bullet Points ConverterSplit paragraphs into bullet points by sentence or clause, with your choice of bullet style.Compare Two ListsFind items only in list A, only in list B, in both lists, or in either, with copy and sort.DOCX to Text ConverterExtract plain text from Word .docx files, in batch, with list markers, tables and .txt download.