Alphabet · A–Z

J in Morse code

Standard Morse code for J. Copy it, hear it, or practice with real examples.

.---

4 signals (1 dot, 3 dashes)Dots are short • dashes are longLetters use spaces • words use “/”

Practice in translator →

Memory mnemonic

ja-MAI-CAA-AA

Say it aloud with the stresses shown. The phrase carries the same dit/dah rhythm as the Morse for J. Once the rhythm sticks the dots and dashes follow.

This is the widely-circulated Scout-meeting variant. Many teachers develop their own — the words don't matter, only that the chosen phrase carries the same dit/dah rhythm.

About J in Morse code

Pattern: .---
Length: 13 Morse units
Spoken as: Juliett (JEW lee ETT)
In English text: 0.16% of letters — the 23rd most common
Sent backwards: ---. is not a letter or digit
Dots ↔ dashes: -... is B

J takes 13 units to send. 23 letters are shorter and 2 others are the same length. Alfred Vail reportedly counted the type in a printer's case and gave the shortest codes to the letters used most, so frequency and length roughly track each other: J is the 23rd most common letter and has the 24th-shortest code.

How long J takes to send

Speed	Unit length	J takes
5 WPM	240 ms	3.1 s
13 WPM	92 ms	1.2 s
20 WPM	60 ms	0.78 s
25 WPM	48 ms	0.62 s

Standard PARIS timing: one unit is 1200 ÷ WPM milliseconds; a dot is 1 unit, a dash 3, and the gap inside a character 1. Add 3 units between letters and 7 between words.

Easily confused with

These are one dot or dash away from J. Mishearing a single element — or clipping one off the end — turns J into one of them, so they are worth drilling side by side.