Easy way to remember
Three equal short taps.
EAdd a dot to reach E
IAdd a dot to reach I
SComplete S
Letter 19 of 26
S in Morse Code (...)
S in Morse code is dot dot dot (· · ·), said di-di-dit
Ready when you are.
3 signals5 units0.30 s at 20 WPM
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International Morse
S
di · di · dit
...
Used in: SOS in Morse code →
One signal, more context
When S is sent on its own
S by itself is a letter. Joining S and K without a letter gap creates SK, which marks the end of a contact.
Sources: ITU-R M.1172 · ARRL traffic procedures
How to tap S
Use si-si-si as a memory cue. Send dot dot dot: three equal short signals with one dot length between them.
Don’t mix it up with
D
D is dash dot dot (− · ·); S is dot dot dot (· · ·). Listen for the dash: S has none.
R
R is dot dash dot (· − ·); S is dot dot dot (· · ·). Listen for the dash: S has none.
Words and names that start with S
| Word | Morse | Try it |
|---|---|---|
| Sun | ... ..- -. | Open in translator → |
| Sea | ... . .- | Open in translator → |
| Sara | ... .- .-. .- | Open in translator → |
| Sam | ... .- -- | Open in translator → |
Keep practicing
Questions people ask
What is S in Morse code?
S is dot dot dot (· · ·), said di-di-dit
What does S mean on its own?
S by itself is a letter. Joining S and K without a letter gap creates SK, which marks the end of a contact.
How long does S take to send?
The pattern uses 5 units, including its internal gaps. At 20 WPM that is 0.30 seconds, before the next letter gap.
Which pattern is easy to confuse with S?
Compare D (− · ·) with S (· · ·). Listen for the difference in signal order and length.
Checked against ITU-R M.1677-1 · Last reviewed · How we check our pages · Report it