ASCII Values for Letters and Characters Explained
Understand ASCII values for uppercase and lowercase letters and how they differ from A1Z26.
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Free · Instant · No Sign-up
Convert Letters to Numbers Instantly
Looking for letterstonumbersconverter com? This free tool lets you convert letters to numbers instantly using A1Z26, A0Z25, reverse alphabet, and ASCII letter values.
- Free to Use
- Instant Results
- No Registration
- Works on Every Device
Result
Your converted numbers will appear here as you type.
How It Works
From text to numbers in four simple steps
No downloads, no accounts, Just type and watch the numeric result build itself in real time.
A1
1. Enter Your Text
Type or paste any letters, single words, full sentences, or entire paragraphs into the converter box.
B2
2. Select a Conversion Method
Pick A1Z26, A0Z25, reverse alphabet, or ASCII, then choose the separator style you prefer. Not sure which mode fits your needs? Read our A1Z26 vs A0Z25 comparison.
C3
3. Get Instant Number Results
Numbers appear the moment you stop typing, no page reloads, no waiting, no server round-trips.
D4
4. Copy or Use Your Result
Tap Copy Result to grab the output for puzzles, lesson plans, code exercises, or personal projects.
Features
Everything a letters to numbers converter should be
Built for speed, accuracy, and everyday classroom or puzzle use.
Instant Conversion
Numbers update live as you type, with zero lag and no page refresh.
Multiple Conversion Modes
Switch between A1Z26, A0Z25, reverse alphabet, and ASCII letter values in one click.
Free Forever
No subscriptions, hidden paywalls, or usage limits ever.
No Installation
Runs entirely in your browser, nothing to download or set up.
Privacy Friendly
All conversion happens locally on your device, text is never uploaded.
Mobile Responsive
A clean, tap-friendly layout that works on phones, tablets, and desktops.
Accurate Results
Built on the standard alphabet mapping used in classrooms and puzzles worldwide.
Unlimited Conversions
Convert as much text as you like, as many times as you need.
Letter Number Chart
Complete A to Z alphabet number chart
A fast reference for every conversion mode, hover any tile to see it lift.
A1
B2
C3
D4
E5
F6
G7
H8
I9
J10
K11
L12
M13
N14
O15
P16
Q17
R18
S19
T20
U21
V22
W23
X24
Y25
Z26
Manual Conversion Guide
How to convert letters to numbers by hand
Understanding the manual method makes the automatic converter easier to trust and use.
Worked example: HELLO
Every letter is matched to its position in the alphabet, starting with A = 1.
| Letter | Alphabet Position |
|---|---|
| H | 8 |
| E | 5 |
| L | 12 |
| L | 12 |
| O | 15 |
More quick examples
CAT
3-1-20
SEO
19-5-15
NUMBER
14-21-13-2-5-18
Once you understand the pattern, the converter above lets you skip the manual counting and get results instantly. For the background behind this system, read our guide on how the A1Z26 cipher works.
Common Uses
Why people convert letters to numbers
This alphabet number converter supports far more than idle curiosity.
Educational Activities
Reinforce alphabet order and basic math for younger learners.
Puzzle Solving
Decode number-based puzzles, riddles, and escape-room clues using our A1Z26 cipher guide.
Cryptography
Experiment with classic substitution ciphers like A1Z26.
Numerology
Explore letter-based numeric patterns in names and words.
Data Processing
Turn text into numeric identifiers for lightweight scripts.
Coding Exercises
Practice loops, arrays, and string handling with a real mapping problem.
Classroom Learning
Turn a simple worksheet into an interactive, checkable activity.
Secret Messages
Write and share playful coded notes with friends or classmates.
By the Numbers
A converter built to be dependable
The same fast, accurate engine every time you visit.
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From the Blog
Learn more about letter-to-number systems
Short, practical guides to ciphers, charts, and conversion methods.
A1Z26 vs A0Z25: What’s the Difference?
A clear comparison of the A1Z26 and A0Z25 letter-to-number systems.
Read More
How Alphabet Numbers Are Used in Puzzles
Discover how letter-to-number systems appear in escape rooms, treasure hunts, and word puzzles.
Read More
Quick Answers
Frequently asked questions
Everything you need to know before you start converting.
What is a letter-to-number converter?
It is a free letter to number converter that maps each letter of the alphabet to a numeric value, most commonly A=1 through Z=26, so any word or sentence can be expressed as a series of numbers.
How does A1Z26 work?
A1Z26 cipher assigns each letter its position in the alphabet: A is 1, B is 2, and so on through Z, which is 26.
Is the converter free?
Yes, completely free with no sign-up, subscription, or usage limit.
Does it support lowercase letters?
Yes. Uppercase and lowercase letters produce identical results.
Can I convert complete sentences?
Yes. You can paste single letters, words, full sentences, or entire paragraphs.
Are spaces preserved?
Yes. Spaces between words are kept in the output.