Important: This tool provides a directional staffing and cost estimate. It is not a full Erlang C, interval-level forecasting, or certified WFM model. True SLA-based voice staffing usually requires interval-level volume, arrival patterns, service level targets, abandon assumptions, occupancy targets, and Erlang C or similar WFM modelling. Non-voice channels may require different planning logic based on concurrency, backlog tolerance, response-time targets, and routing design. Benchmarks vary by industry, channel, customer expectation, complexity, geography, operating hours, and service model. Use this result as a planning guide, not a final workforce schedule.

1. Volume

2. Channels

3. Shrinkage

4. Cost

What this tool does

This free browser-based calculator provides a directional capacity-planning estimate for contact center staffing. It calculates FTE requirements by channel based on monthly volume, average handle time, concurrency, utilisation target, shrinkage, shift length, and work days. It also estimates monthly and annual staffing costs.

Who this tool is for

This tool is for CX leaders, support managers, operations planners, workforce planners, and founders who need to estimate staffing needs and budget for customer support or contact center teams.

What this tool does not do

This tool does not provide certified WFM modelling, Erlang C calculations, or global benchmark staffing levels. It is a directional planning estimate only. True SLA-based voice staffing requires interval-level volume, arrival patterns, service level targets, abandon assumptions, occupancy targets, and Erlang C or similar WFM modelling. Non-voice channels may require different planning logic based on concurrency, backlog tolerance, response-time targets, and routing design.

Frequently Asked Questions

Is this an Erlang C calculator?

No. This is a capacity-planning estimate based on monthly averages. Erlang C requires interval-level data and statistical modelling.

Why is my FTE estimate different from my actual staffing?

Monthly averages smooth out peaks and valleys. Interval-level demand, absenteeism, and schedule inflexibility can all affect actual needs.

What is shrinkage?

Shrinkage is the percentage of paid time that agents are not handling contacts. It includes breaks, lunch, training, meetings, absenteeism, and other non-productive time.

Can SwishrHire help with workforce planning?

Yes. SwishrHire supports CX operations, WFM planning, support structure, and hiring. Contact us for practical support.

Step 1: Volume Forecast

Monthly Call Volume

Monthly Chat Volume

Monthly Email Volume

Monthly WhatsApp Volume (optional)

Step 2: Channel Configuration

Utilization Target (%)

Call AHT (seconds)

Chat AHT (seconds)

Email AHT (seconds)

WhatsApp AHT (seconds)

Chat Concurrency

Email Concurrency

WhatsApp Concurrency

Step 3: Shrinkage & Schedule

Shrinkage (%)

Shift Hours per Day

Work Days per Month

Typical Shrinkage Breakdown

Breaks6%

Lunch6%

Training3%

Meetings3%

Absenteeism5%

Other7%

Total30%

Step 4: Cost Configuration

Currency

Average Monthly Salary

On-Cost (%)

Staffing Model

SLA Target (optional, e.g. 80/20)

Operating Hours per Day (optional)

Live Estimate

Call FTE—

Chat FTE—

Email FTE—

WhatsApp FTE—

Dedicated Total—

Blended Total—

Selected Model—

Monthly Cost—

Annual Cost—

Cost per Contact—

Staffing Calculation Results

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Disclaimer: This calculator provides a planning estimate for staffing and cost modelling. Final workforce plans should be reviewed against actual arrival patterns, service levels, occupancy, shrinkage, concurrency, response-time goals, and actual historical performance.

For a production staffing model, review interval-level demand, arrival patterns, occupancy, shrinkage, concurrency, response-time goals, and actual historical performance.

Need help building a support staffing model?

SwishrHire can help with CX operations, WFM planning, support structure, and hiring.

Contact SwishrHire

Free Contact Center Staffing Calculator