Morse Code Chart: Complete A-Z, 0-9 Reference with Audio
All 53 International Morse Code characters in one interactive chart. Filter by category, search by character or code, and click any card to hear the Morse audio. The timing diagram below shows dot, dash, and gap durations at your current speed.
Showing 53 of 53 characters
Timing Diagram
At 15 WPM, one dot is 0:00 long. All other durations are multiples of this base unit.
The Full International Morse Code
The International Morse Code, formalized as ITU-R Recommendation M.1677, defines 53 standard characters: 26 letters (A to Z), 10 numerals (0 to 9), and 17 punctuation marks and special characters. Together, these cover virtually every text message you might want to send over a Morse channel. The chart above shows all of them, with audio playback for each one.
The 26 letters were assigned by Samuel Morse and Alfred Vail in the 1830s based on letter frequency in English. The 10 numerals were added later (around 1844) using the symmetric 5-symbol pattern. The punctuation marks trickled in over the next few decades as telegraph operators needed ways to send sentences, not just words. The final character set was codified by the International Telecommunication Union in 1932 and has remained essentially unchanged since.
Each character in the chart is shown as a card with three pieces of information: the character itself (large, bold), its Morse representation (in yellow monospace type), and a play button (the small yellow circle) that plays the Morse audio at your current WPM setting. Use the filter buttons to focus on one category, or the search box to find a specific character by its letter or its Morse code.
The Timing Diagram Explained
Below the chart, you will see a five-row timing diagram. Each row shows the relative duration of one element in Morse code, with a yellow bar for signal elements and a hatched gray bar for gap (silence) elements. The numbers on the right show the duration in both Morse units and milliseconds at your current WPM setting.
- Dot (1 unit): The basic time unit. Everything else is a multiple of this.
- Dash (3 units): Exactly three times the dot duration.
- Symbol gap (1 unit): Silence between dots and dashes within a single letter.
- Letter gap (3 units): Silence between letters in the same word.
- Word gap (7 units): Silence between words. Written as a forward slash (
/) on paper.
These five durations are the entire grammar of Morse code. Master them, both sending and receiving, and you can communicate with any Morse operator in the world. Change your WPM setting in the global settings panel and the diagram recalculates instantly.
Reference Chart FAQ
How many characters are in the Morse code reference chart?+
The full International Morse Code reference contains 53 characters: 26 letters (A to Z), 10 numerals (0 to 9), and 17 common punctuation marks and special characters. This chart includes all of them.
Can I search the chart by character or Morse code?+
Yes. The search box at the top of the chart filters in real time. Type a letter (like A) to find its Morse code, or type Morse symbols (like .-) to find the corresponding letter.
What do the filter buttons do?+
The four filter buttons (All, Letters, Numbers, Punctuation) limit the chart to a specific category. All shows all 53 characters; the others show only the selected category.
What is the timing diagram below the chart?+
The timing diagram shows the relative duration of each element in Morse code at your current WPM setting: dot (1 unit), dash (3 units), symbol gap (1 unit), letter gap (3 units), and word gap (7 units). The bars are proportional to the actual durations.
Why are some punctuation marks missing from the chart?+
We include the 17 most common punctuation marks from the ITU-R M.1677 standard. Some less common prosigns (like the fractional bar or specific accent marks) are omitted to keep the chart readable. The full ITU specification is available online if you need them.
Does the chart work on mobile?+
Yes. The chart is fully responsive and works on phones, tablets, and desktops. The grid adjusts from 2 columns on small screens to 6 columns on large monitors, and the search and filter controls are touch-friendly.
Print or Practice?
Take the chart offline or put your knowledge to the test.