O in Morse Code: Letter O, ---, Sound & Examples

The letter O in Morse code is:

---

That means dah dah dah in spoken Morse rhythm. If you only need the quick answer, write O as ---. If you want to translate a full word, name, callsign, or message, use our morse code translator to convert it instantly and check the spacing.

Quick Answer: O in Morse Code

Character	Morse Code	Spoken Pattern	Detail Page
O	`---`	dah-dah-dah	O in Morse Code
o	`---`	dah-dah-dah	same as uppercase O

Uppercase and lowercase do not change Morse code. The letter o in morse code and uppercase O use the same dot-dash pattern.

How to Write O in Morse Code

To write morse code for O, type the symbols exactly like this:

O = ---

Keep the dots and dashes of one letter together. Use one space only when you move to the next letter.

Input	Meaning
`---`	O
`- - -`	usually incorrect, because the parts are separated
no spaces between letters	hard to decode in longer words

How O Sounds in Morse Code

The spoken pattern for O is:

dah-dah-dah

In Morse timing, a dot is short and a dash is longer. A dash is usually about three times the length of a dot. You do not need perfect timing when learning, but the short and long parts should be easy to tell apart.

O in Words and Examples

Here are a few simple words that include or practice the letter O.

Word	Morse Code
SO	`... ---`
SOS	`... --- ...`
CODE	`-.-. --- -.. .`

Try reading the Morse from left to right. Find --- first, then decode the letters around it.

Similar Morse Code Letters

Some Morse code letters look similar when you are new. Compare O with these nearby patterns.

Letter	Morse Code	Difference
O	`---`	target letter
M	`--`	two dashes
0	`-----`	five dashes
G	`--.`	two dashes then dot

If you make a mistake, check the order of dots and dashes first. Many beginner errors come from reversing a pattern or adding one extra signal.

How to Send O With Sound, Light, or Tapping

You can send O in Morse code with any signal that can show short and long timing.

Method	How to Send O
Written Morse	`---`
Sound	play the dah-dah-dah rhythm
Flashlight	flash the same short/long pattern
Tapping	tap the same short/long pattern
Vibration	buzz the same short/long pattern

For best results, keep the parts of the letter close together, then pause before the next letter.

Common Mistakes

Mistake	Why It Matters
Adding spaces inside `---`	A decoder may treat the parts as separate letters
Reversing the pattern	It may become a different letter
Forgetting spaces between letters	A full word becomes hard to decode
Learning only by sight	Listening practice is harder later

Next Step

After learning O in Morse code, go back to the Morse Code Alphabet to compare it with every other letter, or open the Morse Code Translator to convert a complete word or sentence.

Useful links:

Morse Code Alphabet - view the complete A-Z table.
Morse Code Translator - convert text and Morse instantly.
SOS in Morse Code - learn the classic emergency signal.
Text to Morse Code Converter - create copyable Morse output.

FAQ

What is O in Morse code?

O in Morse code is ---.

What is the morse code for o?

The morse code for o is ---. Morse code does not use separate patterns for uppercase and lowercase letters.

How do you say O in Morse code?

Say dah-dah-dah using a short sound for each dot and a longer sound for each dash.

Can I use O in a full Morse message?

Yes. Use --- wherever the letter O appears, then add spaces between letters and a slash between words when needed.

Where can I see all Morse code letters?

Use the Morse Code Alphabet page for the full clickable A-Z chart.

Conclusion

The letter O in Morse code is ---. Learn the written pattern, practice the dah-dah-dah sound, compare it with similar letters, and use the morse code translator whenever you want to check a complete message.

What Is O in Morse Code?