CW Speed Calculator

Calculate Morse code words per minute from dot timing. Includes dash, gap durations, and Farnsworth spacing support.

Dot Duration

Farnsworth Speed (0=Off)

WPM

Tab to move between fields

Words per Minute

20 WPM

Dash Duration

180 ms

Characters per Minute100

Dot Duration60 ms

Inter-Element Gap60 ms

Inter-Character Gap180 ms

Inter-Word Gap420 ms

Est. CQ Call Time11.9 sec

How to Use This Calculator

Enter the dot duration in milliseconds (60ms = 20 WPM).
Optionally set a Farnsworth speed (slower character spacing for practice); leave at 0 for standard timing.
Review the calculated words per minute and characters per minute.
Check dash duration, inter-element, inter-character, and inter-word gap timing, plus the estimated CQ call time, to configure your keyer, decoder, or CW training software.

How the result changes with Dot Duration

Dot Duration: Duration of one dot element in milliseconds (60ms = 20 WPM)
Farnsworth Speed (0=Off): Effective WPM with stretched gaps for learning (0 = standard timing)

WPM = 1200 / dot_duration_ms (PARIS standard)

Identify Input Parameters
Dot Duration = 60, Farnsworth Speed (0=Off) = 0 = 2 input(s) provided
Calculate Words per Minute
Words per Minute
20 = 20
Calculate Dash Duration
Dash Duration
180 = 180
Calculate Characters per Minute
Characters per Minute
100 = 100
Calculate Dot Duration
Dot Duration
60 = 60