Morse Code for O
O in International Morse is −−−, spoken dahdahdah. O is three dahs, the long counterpart of S and half of the SOS skeleton.
−−−
Letter-by-letter Morse for O
O (Oscar) is one Morse character: −−−, spoken dahdahdah.
−−−
About Morse for the letter O
Operators say dahdahdah. The NATO word is Oscar.
O is −−− — 3 elements. All 3 elements are dahs.
- Morse
- −−−
- Dots / dashes
- 0 · / 3 −
- Characters
- 1
- At 18 WPM
- 800 ms
- NATO word
- Oscar
How to tap O
- The pattern is −−− (dahdahdah). A dit is a short tap or flash; a dah is about three times longer.
- O is a single character, so you only need the tiny gap between its own dits and dahs.
- At 18 WPM this takes about 800 ms. Slow down to 12 WPM if you are still learning the rhythm.
- Press Play to hear O, or turn on the lamp and match the flashes.
Easy to mix up
O is easy to mix with M (−−). Learn both rhythms so they stay distinct.
Morse Code for O — FAQ
What is the Morse code for O?
The Morse code for the letter O is −−−. Say dahdahdah.
How do you tap or flash O in Morse?
Match −−−: short for each dit, about three times as long for each dah. Press Play on this page, then copy the same timing with a tap, whistle, or flashlight.
How long does O take to send?
At 18 WPM, the letter O takes about 800 ms. At 12 WPM the same −−− pattern is slower but the dit/dah ratios stay identical.
How do you remember Morse for O?
Say dahdahdah and attach the NATO word Oscar. O is three dahs, the long counterpart of S and half of the SOS skeleton.
Related Morse lookups
Other high-intent translations — each page has its own Morse, timing, and breakdown.