Agent occupancy calculator
See how much of your agents' available time goes into conversations, how much of the paid day they are available at all, and how many agents keep you under your target. Works for calls, email and live chat with several chats at once. Free, no sign-up, nothing leaves your browser.
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The method
How to calculate agent occupancy
Compare the hours agents spend on conversations with the hours they are available, then compare the available hours with the hours you pay for.
Occupancy answers one question: of the time agents are logged in and ready, how much do they spend on customers? Handle time covers talking or typing, hold and the wrap-up after each conversation. The rest of the available time is idle time, spent waiting for the next call or chat.
Utilization looks at the whole paid day. Breaks, training, meetings, coaching and absence all keep agents away from the queue, and that lost share is called shrinkage. Sources define utilization in different ways: TechTarget divides logged-in time by paid time, while Peopleware counts the productive work in paid time. The calculator shows both readings.
Live chat changes the arithmetic. An agent with two chats open handles two conversations in the same minutes, so the calculator divides the hours by the number of conversations at once. Treat that as an estimate, because chats rarely start and end together.
440 hours a month
3,300 × 8 ÷ 60 = 440 h
3,300 conversations of 8 minutes each, one at a time. Four agents are available 120 of their 160 paid hours, 480 hours in total.
91.7%
440 ÷ 480 = 91.7%
Agents are busy 91.7% of their available time and have about 10 idle hours each a month. That is above the 85% target and above 90%, the level the sources below advise not to exceed.
5 agents
440 ÷ (85% × 120) = 4.31 → 5
With a fifth agent, occupancy drops to 73.3%. Utilization stays at 75%: 120 of 160 paid hours, so shrinkage is 25%.
Inputs
Where to find each number
Take one month from your help desk, phone or chat system and payroll. Use the reference points only until you have your own.
| Input | Where to find it | Reference point |
|---|---|---|
| Conversations handled | Help desk, phone or live chat reports for the month | Your own data |
| Average handle time | Help desk or phone system: talk or chat time plus hold plus wrap-up | Our AHT Calculator works it out from talk, hold and wrap-up |
| Conversations at once | Chat reports (concurrency) or the chat limit set for each agent | In a 2013 Call Centre Helper poll of 256 webinar attendees, 70% said an agent can handle 2–3 web chats at once |
| Agents | Rota or payroll | Your own data |
| Paid hours per agent | Contracts or payroll, including paid holidays and sick days | A 40-hour week averages about 173 hours a month (40 × 52 ÷ 12) |
| Available hours per agent | Logged-in, ready or available time in the phone or chat system | If you only know your shrinkage, multiply paid hours by (1 − shrinkage) |
| Target occupancy | Your planning target | A maximum of 85%–90% (Call Centre Helper); no more than 90% (Peopleware) |
Use the same month and the same people for every number. If a manager covers the queue for a few hours, add those hours to both the available and the paid hours.
Benchmarks
What occupancy is healthy
There is no single right number, but the sources agree on the upper limit.
Call Centre Helper recommends a maximum of 85%–90% and quotes a consultant whose clients cap occupancy between 85% for in-house teams and 90% for more performance-driven ones. Users of its Erlang calculator enter a maximum occupancy of 83.3% on average, across more than 160,000 calculations. TechTarget warns that occupancy consistently above 88%–92% is likely to lead to burnout and long queues. Peopleware, a workforce management vendor, advises not to go above 90%.
Low occupancy is not a goal either: it means agents wait for work. A small team cannot run as busy as a large one and still answer quickly, because someone has to be free when the next conversation arrives. Read occupancy next to your response times: if first replies are slow and occupancy is high, you need more available hours or fewer conversations.
For utilization, TechTarget names 75%–85% as a common target and notes that above 85% agents stay logged in for long stretches, which can lead to frustration and poor service. The table under the result shows occupancy with one agent fewer and up to two more, so you can see what a hire or an absence does.
Spreadsheets
Agent occupancy formulas for Excel and Google Sheets
Conversations in B2, handle time in minutes in C2, conversations at once in D2, agents in E2, paid hours per agent in F2, available hours per agent in G2, target occupancy in H2.
Occupancy
Format the cell as a percentage.
Utilization
Shrinkage is 1 minus this result.
Agents needed at the target
Round the result up to a whole agent.
Conversations the team can handle at the target
FAQ
Agent occupancy questions
How do you calculate agent occupancy?
Divide the time agents spend handling conversations, including hold and wrap-up, by the time they are logged in and available. In the example, 440 ÷ 480 hours = 91.7%.
What is the difference between occupancy and utilization?
Occupancy compares handling time with available time. Utilization compares available time with paid time, so it shows how much of the paid day goes to breaks, training, meetings and absence. Some sources count all productive work in utilization, so the calculator also shows conversation time as a share of paid hours.
What is a good occupancy rate?
Call Centre Helper recommends a maximum of 85%–90%, and Peopleware advises not to go above 90%. TechTarget links occupancy that stays above 88%–92% with burnout and long queues. Below that, pick a target that still lets you answer quickly.
Why is 100% occupancy a problem?
Nobody is free when the next customer arrives, so queues grow, and agents get no breathing space between conversations. A result above 100% means the inputs do not match: more handling hours than available hours. Usually the available hours are too low or the handle time includes waiting.
How do I count live chat with several chats at once?
Enter the average number of chats an agent has open together. The calculator divides the handling hours by that number. Check that your handle time is per chat, from the agent's first reply to the end of wrap-up.
How does an AI agent change occupancy?
Every conversation an AI agent closes on its own takes its handle time out of the workload. Lower the conversations in the calculator to see the effect, or put a value on the saved hours with the Chatbot ROI Calculator.
Does the calculator store my data?
No. Everything runs in your browser. The share link keeps your numbers in the address after the # sign, which is not sent to our server.
References
Sources
- Occupancy formula, 85%–90% maximum and the 83.3% Erlang calculator average: Call Centre Helper, "How to Calculate Occupancy in the Contact Centre", checked October 27, 2026
- Utilization formula and target, burnout risk above 88%–92%: TechTarget, "How to calculate call center utilization rates", June 5, 2023
- Occupancy and utilization definitions, 90% limit: Peopleware (workforce management vendor), "Occupancy, utilization, productivity: what's the difference?", checked October 27, 2026
- Chats at once: Call Centre Helper, "An Agent Can Handle No More Than 3 Webchats at the Same Time", poll of December 2013, published April 2, 2014
- Concurrency formulas: Call Centre Helper, "What is the Formula for Concurrency In Chat Support?", April 12, 2022
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