Communication Channels Calculator
PMP & CAPM Formula Tool — n(n-1)/2
How Quickly Channels Grow
5 people
10
10 people
45
15 people
105
20 people
190
25 people
300
30 people
435
Exam Tip
The communication channels formula is one of the most commonly tested formulas on both the PMP and CAPM exams. Remember: n(n-1)/2. Adding just one person increases channels significantly — this is why communication management becomes harder as the team grows.
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