Learn Morse Code

Morse code is a method of transmitting text information as a series of on-off tones, lights, or clicks that can be directly understood by a skilled listener or observer without special equipment. It is named after Samuel Morse, the inventor of the telegraph.

The Basics: Dots and Dashes

Each character (letter, number, or punctuation) is represented by a unique sequence of dots and dashes.

  • The dot (·), also called a "dit", is the basic unit of time.
  • The dash (—), or "dah", is three times as long as a dot.

The Rules of Timing

The timing of the spaces between the sounds is just as important as the dots and dashes themselves. This is often called the "1-3-7" rule, based on the length of a dot.

  • The space between parts of the same letter (e.g., between the dot and dash in 'A') is one dot duration.
  • The space between letters in a word is three dot durations.
  • The space between words is seven dot durations.

Famous Signal: SOS

The sequence SOS (... --- ...) is internationally recognized as a Morse code distress signal. It consists of three dits, followed by three dahs, and three more dits. While often associated with phrases like "Save Our Souls" or "Save Our Ship," these are backronyms. The sequence was chosen simply because it's a clear, continuous, and unmistakable pattern that is unlikely to be confused with other transmissions. This makes it ideal for emergency use.

Click "Play SOS" to see & hear it!

Other Notable Morse Phrases & Conventions

73 (Best regards)

In amateur radio, "73" is a common way to say "Best regards." Its Morse code is --... ...--.

Morse for "73" will appear here.

88 (Love and kisses)

Similarly, "88" is used in amateur radio to mean "Love and kisses." Its Morse code is ---.. ---...

Morse for "88" will appear here.

K (Over / Invite to transmit)

The single letter "K" sent in Morse code ( -.- ) is a procedural signal meaning "over," inviting the other party to transmit. It's less formal than "go ahead".

Morse for "K" will appear here.

"What hath God wrought!"

This phrase was the first official message sent by Samuel Morse on May 24, 1844, to formally open the Baltimore–Washington telegraph line. It marked a pivotal moment in communication history.

Morse for the phrase will appear here.

MORSE CODE REFERENCE

Click any character below to see and hear it in the Morse Player.

Morse Player

Click a letter above to see & hear it!

Learning Resources

Here are some excellent resources to help you learn and practice Morse code: