Skip to content
Call Center Staffing
Free tool · No signup required

How many call center agents do you actually need?

Plug in your call volume, AHT, service level, and attrition. Get a defensible cohort recommendation in seconds. No email, no decks — just the math you need before you brief a recruiter.

Run the calculatorHow the math works
What you'll get
  • Required productive agents to hit your service level
  • Total scheduled headcount after shrinkage
  • Hire-to-bench cohort with nest-survival buffer
  • Annual replacement headcount from attrition
Field-tuned approximation
  • Free quote
    Month-to-month · no setup fees
  • 200+
    Businesses served
  • HIPAA · PCI · SOC 2
    Compliance ready
  • 14 countries
    Trained agents on tap

The calculator

Inputs on the left, live results on the right.

Most operators overestimate AHT by 15–20%. Calibrate against your last 90 days of data, not your job rec. Garbage in, garbage out.

Your inputs

Tell us your numbers.

All math runs in your browser. Nothing is submitted.

Calls per month across all queues.

Average time per call including ACW. Most operators overestimate AHT by 15–20%. Calibrate against your last 90 days, not your job rec.

Higher service level targets need more agents on the floor.

Total hours queues are live across all shifts.

Anything over 85% sustained burns agents out fast.

Time off the phone — breaks, training, coaching, PTO, sick.

If you don't know — pick high. Most operators underreport by half.

Default English. Add bilingual chips if your queues need them.

Next step

Want a written staffing plan based on these numbers?

A senior recruiter takes the calculator output and turns it into a defensible staffing plan — region mix, screening criteria, sourcing timeline, ramp plan. One business day. No obligation.

Get a written plan
What's in the written plan
  • Recommended region mix (onshore / nearshore / offshore)
  • Sourcing timeline based on your start date
  • Screening criteria tuned to your QA scorecard
  • Cohort sizing with nest-survival buffer
  • Ramp plan from class graduation to floor target

How this calculator works

A defensible field approximation — not full Erlang C.

We start from monthly call volume and operating hours to derive calls per hour. Calls per hour times AHT (in hours) gives the offered load in Erlangs — the amount of agent-time the queue demands at any given moment.

We divide by your occupancy target, multiply by a service-level buffer (1.05x for 70/60 up to 1.30x for 95/60), then divide by (1 − shrinkage) to get scheduled headcount. A 15% nest-survival buffer gives the recommended hire-to-bench cohort. Annual replacement headcount comes from your attrition midpoint.

It is not a full Erlang C solver, and it does not model interval-level variance. It will land you in a defensible ballpark — within a few agents on most queues. A senior recruiter refines it against your actual interval forecast in the written plan.

  1. 01
    Calls per hour
    Monthly volume ÷ (operating hours per week × 4.33 weeks/month).
  2. 02
    Offered load (Erlangs)
    Calls per hour × (AHT in seconds ÷ 3600).
  3. 03
    Productive agents
    ceil((Erlangs ÷ occupancy) × service-level multiplier).
  4. 04
    Scheduled headcount
    ceil(productive ÷ (1 − shrinkage)).
  5. 05
    Hire-to-bench cohort
    ceil(scheduled × 1.15) for nest survival and ramp.
  6. 06
    Annual replacement headcount
    ceil(scheduled × annualized attrition midpoint).

Next steps

Related reading once you have your number.

The math is half the answer. The other half is the sourcing playbook that lands the cohort and keeps it on the floor.

From numbers to plan

Turn your calculator output into a written staffing plan.

A senior recruiter takes your inputs, refines them against an interval forecast, and sends back a written plan with screening criteria and a sourcing timeline — within one business day.

1 business dayNo obligationPay only for hours worked
What you'll get

Your free written quote includes:

  • How many agents you need and where
  • Estimated hourly rate per agent
  • How fast we can deploy a team
  • Free written quote — no obligation
Get my written plan

No spam. No newsletter. A senior account manager reads every reply.