0 in Morse Code
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Five dashes, nothing else: — — — — — . Every symbol in 0 costs the full length of a dash, which makes it the slowest single digit to key of anything in the ten-digit set — no dots anywhere to speed the rhythm along.
The Slowest Digit to Send
Because every symbol in 0 is a full dash, it takes noticeably longer to key than any other digit, which is exactly why contest and DX operators developed an informal shortcut: an unofficial "cut number" convention substitutes a single dash — the same code as the letter T — for a full 0 whenever context makes it obvious a number is being sent. It's not part of standard Morse code, just a widely understood speed shortcut among experienced operators exchanging serial numbers or signal reports quickly.
Related Digits
- 5 (five dots) is 0's exact opposite — same length, entirely short signals instead of long ones.
- 9 (four dashes, one dot) is one symbol short of 0's all-dash pattern.
Frequently Asked Questions
Does anyone ever mishear 0 for something else?
Rarely, since five unbroken dashes has no dots to miscount — the more realistic slip is losing track of how many dashes have gone by in a long run, or blurring it into a string of T's sent back to back without the right spacing.
Is there a shortcut for sending 0 in Morse code?
Informally, yes — contest and DX operators sometimes substitute a single dash, the cut number for 0, when it's already clear a number is being sent, though it isn't part of standard Morse code.