Theory & ReferenceITU-R M.1677-1Updated: June 2026

Morse Code Timing: Dot, Dash, Gaps, WPM, Farnsworth & Wordsworth Explained

Every dot and dash is measured against one base unit. Learn the 5-element timing rule, how WPM is calculated using the PARIS standard, and the two training systems — Farnsworth and Wordsworth — that stretch the gaps to make learning easier. Includes a live Timing Lab that draws every signal to scale.

The 5 Elements of Morse Code Timing

Morse code has no fixed unit of time in seconds — only ratios. Every signal and every silence is a multiple of one base unit, the length of a single dot. ITU-R M.1677-1 defines exactly five elements, and once you know the ratio between them you can decode Morse at any speed, fast or slow. The same five units apply no matter which characters you're sending — the Morse code alphabet, numbers, and punctuation all follow identical timing rules, only the dot-dash patterns themselves change.

Dot (dit)the base tone signal
1 unit
Dash (dah)3× the length of a dot
3 units
Intra-character gapbetween dots/dashes inside one letter
1 unit
Inter-character gapbetween letters in a word
3 units
Word gapbetween two words
7 units

Bars above are drawn proportionally — a dash sounds exactly three times as long as a dot. This precision is what lets a machine, or a trained human ear, decode Morse reliably at any speed.

Why "PARIS " Is the Standard Word — 50 Units, Down to the Last Gap
ElementUnit ValueCount in "PARIS "Total Units
Dots ·1 unit each1010
Dashes 3 units each412
Intra-character gaps1 unit each99
Inter-character gaps3 units each412
Word gap7 units17
Total50 units

"PARIS " (.--. .- .-. .. ... /, including its trailing word space) lands on a perfectly round 50 units — close to the average length of an English word — which is why it became the international yardstick for words-per-minute. At 20 WPM a single unit is 60ms, so the whole word "PARIS " takes exactly 50 × 60ms = 3000ms.

Timing Laboratory — Draw Any Word to Scale

Type a word or short phrase, pick a timing system, and the lab below draws every dot, dash and gap as a real bar — width proportional to milliseconds — then plays it back in sync. See Standard, Farnsworth and Wordsworth timing rendered to the exact same ruler.

Character speed20 WPM
60
Dot ms
180
Dash ms
60
Intra-gap ms
180
Inter-gap ms
420
Word-gap ms
2580
Total ms
20
Effective WPM
Dot (tone) Dash (tone) Intra-character gap Inter-character gap Word gap

Farnsworth Timing — Full-Speed Characters, Stretched Gaps

Slowing Morse code down by simply stretching everything — dots, dashes and gaps alike — has a hidden cost: it teaches your brain to count dits and dahs instead of recognizing each character as a single rhythm. Farnsworth timing fixes this by keeping every character at full target speed and only stretching the silence between characters and words, so each letter always sounds exactly like it will at full speed — giving your brain breathing room to process.

The technique is named after Donald R. "Russ" Farnsworth (W6TTB), who developed it in the late 1950s. It's now the standard recommendation by the ARRL, Long Island CW Club, and FISTS. If you haven't memorized the characters yet, check out our complete Morse code learning guide.

Standard 18 WPM

Duration: 5.93s

Farnsworth 18 / 8 WPM

Duration: 12.07s

Notice the dots and dashes are identical in both clips — only the gaps between letters grew.

Practical tip: The ARRL recommends starting Farnsworth practice at an 18–20 WPM character speed with a 5–10 WPM effective speed, then gradually raising the effective speed toward the character speed as recognition improves.

Wordsworth Timing — The Advanced System

Where Farnsworth stretches the gap between letters and the gap between words, Wordsworth timing stretches only the gap between words. Every letter and every gap inside a word stays at full target speed — you get a fraction of a second longer to recognize each whole word before the next one starts.

It is aimed at operators who have already mastered instant character recognition and want to train instant word recognition without individual letter pauses. Operators at this stage also practice prosigns for real radio communications.

Standard 18 WPM

Duration: 6.20s

Wordsworth 18 / 12 WPM

Duration: 7.87s

In Wordsworth timing, even the gaps between letters stay untouched — only the pause between words expands.

Standard vs Farnsworth vs Wordsworth — Side by Side

Same phrase, same character speed, three different gap strategies. Watch which part of the bar stretches in each row.

Standard — 20 WPM throughout 20 WPM effective

5.34s

Farnsworth — 20 WPM characters 10 WPM effective

9.76s

Wordsworth — 20 WPM characters 14 WPM effective

6.63s

Other Timing Concepts Worth Knowing

These concepts come up once you move into real CW operating, where speed, sending style, and Q-codes all matter alongside raw timing.

Character Speed vs Effective Speed

"Character speed" is how fast each individual dot, dash and intra-character gap sounds. "Effective speed" (also called copy speed) is the real words-per-minute rate once the stretched gaps are counted in. In Farnsworth and Wordsworth practice these two numbers are deliberately different; in standard timing they are identical.

⚖️Weighting

Electronic keyers let an operator nudge the dot-to-dash ratio away from the standard 1:3, usually expressed as a percentage from 45% to 60% (50% = standard). Listen to how the letter "K" changes as the ratio shifts:

Weighting50%
Standard 1∶3 ratio

🔤American Morse Timing

Original American (Vail) Morse code, used on 19th-century landline telegraphs, didn't follow the clean binary system used today. Some letters — C, O, R, Y, Z — used variable-length dashes and internal gaps within a single letter. See our American Morse Code guide.

🏆The 75.2 WPM World Record

The fastest Morse code ever copied by a human is 75.2 WPM, set by Ted R. McElroy on July 2, 1939, at a code-copying contest in Asheville, North Carolina — copied straight onto a typewriter. Decades later, the record still stands.

Speed Benchmarks — From License Tiers to the World Record
SpeedBenchmarkDot duration
5 WPMFormer FCC Novice / Technician license requirement (dropped 2007)240ms
13 WPMFormer FCC General license requirement (dropped 2007)92ms
20 WPMFormer FCC Extra license requirement (dropped 2007)60ms
20–25 WPMTypical experienced ham radio CW operator48–60ms
40+ WPMElite contest / traffic-handling operators30ms
75.2 WPMTed R. McElroy's 1939 world record — still unbeaten~16ms

Test Your Timing Knowledge

Eight questions covering everything on this page — the 1∶3∶1∶3∶7 rule, the PARIS standard, Farnsworth, Wordsworth, weighting and the world record.

Question 1 of 8
What is the ratio of a dash to a dot in standard Morse code timing?
Score: 0 / 8

Frequently Asked Questions

Frequently Asked Questions

Every Morse signal is a multiple of one base unit: a dot is 1 unit, a dash is 3 units, the gap between dots/dashes inside a character is 1 unit, the gap between characters is 3 units, and the gap between words is 7 units. This 1-3-1-3-7 rule is defined by ITU-R M.1677-1.

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