Erlang C Calculator

Calculate the number of call center agents required to hit your target service level. Includes AHT, occupancy, ASA, trunks, and AI-deflection comparison.

Inputs

%
%
%

Results

Agents required
20
14 productive + shrinkage
Service level
88.8%
within 20s
ASA
7.8s
Average speed of answer
Trunks needed
18
for 1% blocking
Traffic: 10.00 Erlangs · Occupancy: 71.4%

Staffing if AI handles routine calls

Agents required
20
vs 20 without AI
Headcount saved
Pick a deflection rate
Service level (with AI)
88.8%
within 20s
Cut agent headcount with Edesy Voice AI
Edesy AI Voice Agents handle routine calls 24/7 — bookings, FAQs, status checks, COD verification — and route only complex calls to your human team.
See Voice AI Platform

Features

  • Calculate required agents for target service level

  • Predict occupancy and Average Speed of Answer (ASA)

  • Account for shrinkage (breaks, training, absenteeism)

  • Trunk / line sizing at 1% blocking

  • Compare staffing with 30/50/70% AI deflection

  • No signup required

Perfect For

Workforce Management Analysts

Size shifts, validate forecasts, and stress-test service-level targets without spreadsheets.

Call Center Operations Managers

Justify headcount changes with Erlang C math and quantify the impact of AI voice agents.

BPO RFP Teams

Quickly produce defensible staffing estimates for client proposals.

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