What Is 0 in Morse Code?
The Morse code for 0 is -----, a sequence of five dashes. In international Morse code (the ITU standard), every digit from 0 to 9 uses exactly five signals — a mix of dots (·) and dashes (−). Number 0 is the only digit made entirely of dashes, which is why it’s often the easiest digit to recognize by ear.
When you hear or read “morse code 0”, “morse code for 0”, “0 morse code”, or “number 0 in morse code”, the answer is always the same five-dash pattern: -----.
Number 0 vs Letter O in Morse Code
A common mix-up: people search for “o in morse code” when they actually mean the digit zero. The two are different:
- Letter O =
---(three dashes) - Number 0 =
-----(five dashes)
If you’re sending a phone number, ZIP code, or any numeric data, always use ----- for zero. Using --- would actually transmit the letter O, not the digit.
Practice: What Is the Morse Code for 0?
Select the correct Morse code for 0:
How to Tap Number 0 in Morse Code
To transmit Number 0 (-----), use this sequence:
ITU Timing Rules
- Dot (·) = 1 unit
- Dash (−) = 3 units (3× longer)
- Signal gap = 1 unit
- Letter gap = 3 units
- Word gap = 7 units
Timing Reference Table
| Speed | Dot | Dash | Letter gap | Word gap |
|---|---|---|---|---|
| 5 wpm | 240ms | 720ms | 720ms | 1680ms |
| 10 wpm | 120ms | 360ms | 360ms | 840ms |
| 17 wpm (this page) | 70ms | 210ms | 210ms | 490ms |
| 20 wpm | 60ms | 180ms | 180ms | 420ms |
How to Remember Number 0 in Morse Code
Zero is the “all dashes” digit — the longest, slowest digit in Morse. Repeat the pattern aloud as “daaah daaah daaah daaah daaah” until it becomes muscle memory.
Frequently Asked Questions — Number 0 in Morse Code
0 in Morse code is ----- (five dashes). The number 0 uses 0 dots and 5 dashes, the standard ITU pattern for the digit zero.
The Morse code for 0 is -----. Tap five long presses in sequence with a one-unit gap between each.
No. The number 0 is ----- (five dashes). The letter O is --- (three dashes). They look similar but use a different number of signals.
To send number 0: long press, then long press, then long press, then long press, then long press. Numbers always use 5 signals total.
All Morse digits use exactly 5 signals by ITU standard, making them easy to distinguish from letters (1–4 signals) during transmission.
Number 0 is -----. Lower digits have more dots at the start; higher digits have more dashes. This systematic pattern makes numbers easier to learn as a sequence.
Related Morse Code Numbers
Other 5-signal digits often confused with number 0: