Quick answer
In A1Z26 each letter maps to its alphabet position: A = 1, B = 2, … Z = 26. The text 'abc' becomes 1 2 3, with a sum of 6.
Enter text. The calculator returns the numbers for each letter and their sum. Use this letters to numbers converter to check your own figures.
Related tools: Fraction Calculator: Add, subtract, multiply and divide fractions with simplified and mixed-number results. Ratio Calculator: Simplify a ratio of two whole numbers. Average Calculator: Arithmetic mean, sum, count, minimum and maximum of a list of numbers.
How to use the Letters to Numbers Converter
- Type text.
- Press Calculate to see the result, and use Reset to start again.
| Input | What to enter | Allowed values |
|---|---|---|
| Text | Text | — |
Formula and method
Formula
A = 1, B = 2, … Z = 26
IEEE-754 double precision; shown to at most 6 decimal places.
Letters map to their alphabet position; other characters are ignored in the sum.
Worked examples
These examples are verified: each one is an automated test case that the live calculator must reproduce exactly.
Example 1
Inputs: Text = abc.
| Result | Value |
|---|---|
| Numbers | 1 2 3 |
| Sum | 6 |
Example 2
Inputs: Text = Hello.
| Result | Value |
|---|---|
| Numbers | 8 5 12 12 15 |
| Sum | 52 |
The first line is the headline result (numbers). Below it the letters to Numbers Converter lists sum, which describe the same case from other angles. IEEE-754 double precision; shown to at most 6 decimal places.
A simple cipher
A1Z26 is a basic substitution used in puzzles and geocaching. 'HELLO' is 8 5 12 12 15, with a sum of 52. It offers no real security because it's trivial to reverse.
Details
Case is ignored and non-letters are skipped. The sum of the letters is sometimes used in numerology and word games, though it has no scientific meaning.
What happens with invalid input
These messages are produced by the calculator itself, so you know what to fix.
- Text: entering "123 !!" shows "Enter at least one letter A–Z." beside that field and no result.
Choosing between the Letters to Numbers Converter and similar calculators
Each row shows what a related calculator on this site asks for and what it returns, so you can pick the one that matches your question.
| Calculator | You enter | It returns |
|---|---|---|
| [Fraction Calculator](/math/fraction-calculator/) | numerator 1, denominator 1 and operation | Result |
| [Ratio Calculator](/math/ratio-calculator/) | first number and second number | Simplified ratio |
| [Average Calculator](/math/average-calculator/) | numbers | Average (mean) |
| [Long Division Calculator](/math/long-division-calculator/) | dividend and divisor | Quotient |
| [Percent Off Calculator](/math/percent-off-calculator/) | original price and discount | Sale price |
Background: rounding and basic arithmetic
Rounding to a place looks at the digit just to its right: 0 to 4 rounds down and 5 to 9 rounds up (the half-up convention, so 2.5 becomes 3). Rounding 838.274 gives 800 to the nearest hundred, 840 to the nearest ten and 838 to the nearest one.
Some systems use banker's rounding (half to even), which sends 2.5 to 2 and 3.5 to 4; check which convention your task requires, and round only at the end of a multi-step calculation.
Assumptions and limitations
- Non-letters skipped
If a required value is empty, not a number, or outside its allowed range, the form marks that field with a message and shows no result instead of a misleading number. The automated checks deliberately try invalid entries for text to confirm this.
Frequently asked questions
What number is Z?
Z is 26, the last letter, in the A = 1, B = 2 scheme.
Can I turn numbers back into letters?
Yes, subtract and look up the position.
Does it handle accents?
Only plain letters A to Z are converted; accented letters and other characters are skipped.
What does the Letters to Numbers Converter calculate?
A=1 … Z=26 letter-number cipher. It returns Numbers and Sum.
What formula does the Letters to Numbers Converter use?
A = 1, B = 2, … Z = 26. Letters map to their alphabet position; other characters are ignored in the sum.
What do I need to enter in the letters to Numbers Converter?
You enter Text.
How is the result rounded or limited?
IEEE-754 double precision; shown to at most 6 decimal places. Non-letters skipped.
What is an example of a letters to Numbers result?
With text abc, the numbers is 1 2 3.
Where does the method come from?
The method follows: A1Z26 substitution cipher.
Related calculators
- Fraction Calculator — Add, subtract, multiply and divide fractions with simplified and mixed-number results.
- Ratio Calculator — Simplify a ratio of two whole numbers.
- Average Calculator — Arithmetic mean, sum, count, minimum and maximum of a list of numbers.
- Long Division Calculator — Divide whole numbers to a chosen number of decimal places.
- Percent Off Calculator — Find the sale price and savings after a percentage discount.
- Rounding Calculator — Round a number to decimal places, with up, down or nearest modes.
Sources
- A1Z26 substitution cipher
Content last reviewed 2026-11-04. Formulas and worked examples are checked by automated tests against independently computed values.