H in Morse Code
The letter H in Morse code is ....: four dots, sounded “di-di-di-dit”. It is the top of the dot ladder (E, I, S, H) and the first letter of HI, HELLO and HELP.
What Does H Look Like in Morse Code?
H has 4 signals (4 dots) and takes 7 timing units to send. Four quick dots are easy to send but easy to miscount by ear, so H is often confused with S and the number 5. See it next to every other letter on the Morse code alphabet chart.
Words That Start With H in Morse Code
| Word | Morse code | Letters |
|---|---|---|
| HI | .... .. | H I |
| HOW | .... --- .-- | H O W |
| HOME | .... --- -- . | H O M E |
| HELP | .... . .-.. .--. | H E L P |
| HAPPY | .... .- .--. .--. -.-- | H A P P Y |
Each word starts with ..... A space separates the letters. Type any other word into the Morse code translator to hear it.
Letters Easily Confused With H
S (one dot fewer)
... · three dots
5 (one dot more)
..... · five dots
V (last dot becomes a dash)
...- · three dots then a dash
I I (two letters)
.. .. · same dots with a letter gap
E, I, S, H and 5 are one to five dots. At normal speed the difference between four and five dots is under a tenth of a second, so learn the sound of each as a whole. For a step-by-step method, read how to identify a letter from its Morse pattern.
How to Remember H in Morse Code
Say it out loud
“Di-di-di-dit” is a fast, even run of four. Many learners hear it as a quick drum roll.
Climb the dot ladder
E is one dot, I two, S three and H four. Learn them as a set and you will know four letters at once.
Listen for the tempo
Instead of counting dots, notice how long the run lasts. H is a little longer than S and a little shorter than 5.
Drill it
Hear H against S and 5 in the Morse code practice quiz.
How Long Does H Take to Send?
H is 7 units long: 1 for each of the four dots and 1 for each of the three gaps inside the letter. A dot is 1 unit and a dash is 3. The Morse code timing guide explains how speed changes the length of a unit.
| Speed | One unit | Time to send |
|---|---|---|
| 5 WPM | 240 ms | 1680 ms |
| 10 WPM | 120 ms | 840 ms |
| 15 WPM | 80 ms | 560 ms |
| 20 WPM | 60 ms | 420 ms |
| 25 WPM | 48 ms | 336 ms |
H in Radio and Real-World Morse
HH: error
Two Hs run together make eight dots (........), the signal for “error, ignore that word”. See Morse code prosigns.
HI HI: laughter
On the air, HI HI (.... .. / .... ..) is the Morse way of laughing at a joke.
HW: how
HW (.... .--) means “how”, as in HW CPY, asking how well the other station is copying. More in Morse code abbreviations.
H in greetings
H begins hello and hi in Morse code and help in Morse code, two of the most searched Morse words.
How Efficient Is H in Morse Code?
Alfred Vail gave common letters short codes after estimating how often each letter is used. Comparing H’s share of English text with the length of its code shows how well that plan worked for this letter.
| Measure | H |
|---|---|
| Share of letters in English text | 6.1% |
| Frequency rank (of 26 letters) | 8th |
| Morse code length | 7 units |
| Other letters with the same length | D, M, R, U |
| American Morse (US landline telegraph) | .... (same as International) |
H is the eighth most common letter, helped along by words like the, that and with, and it takes 7 units. Four dots in a row are fast but easy to miscount at speed, which is why beginners often confuse H with S or the number 5.
Frequently Asked Questions
What is H in Morse code?
H in Morse code is ...., four dots.
How do you say H in Morse code out loud?
H is spoken “di-di-di-dit”: four short, even sounds.
What letter is four dots in Morse code?
Four dots (....) is the letter H. Three dots is S and five dots is the number 5.
What is the difference between H and S in Morse code?
H has four dots and S has three. They sound almost the same at speed, so listen to how long the run of dots lasts.
What does HI HI mean in Morse code?
HI HI is how radio operators laugh in Morse code. It is sent as .... .. .... ...