Queue Worker Capacity Calculator
Use measured task processing throughput to estimate the number of parallel workers needed for a target average utilisation.
How to use this calculator
- Enter the incoming tasks per minute using the units shown beside the field.
- Enter the tasks processed per worker per minute using the units shown beside the field.
- Enter the target worker utilization (%) using the units shown beside the field.
- Review the calculated values and check that the assumptions match your scenario.
- Change one input at a time when comparing scenarios so you can see which assumption drives the result.
Formula and assumptions
Required workers = ceiling(arrival rate / (per-worker service rate × target utilization)).
- Tasks can have different runtimes and arrival bursts. Add operational headroom and validate concurrency limits, failure retries and downstream capacity.
- The result is computed from the values you provide; it does not fetch external rates, live account data or local rules.
Worked examples
Worked example
480 tasks per minute with 90 tasks/minute per worker at a 70% target requires eight workers.
Example inputs: Incoming tasks per minute = 480, Tasks processed per worker per minute = 90, Target worker utilization (%) = 70.
Compare the displayed output with your own measurements before using it in a decision.
Understanding the result
Tasks can have different runtimes and arrival bursts. Add operational headroom and validate concurrency limits, failure retries and downstream capacity.
Results are estimates based on the stated model. If the situation depends on measured conditions or contractual specifications, use those source values rather than typical assumptions.
Important notes
Tasks can have different runtimes and arrival bursts. Add operational headroom and validate concurrency limits, failure retries and downstream capacity.
Frequently asked questions
What formula does this calculator use?
It uses the method described above: Required workers = ceiling(arrival rate / (per-worker service rate × target utilization)).
What should I verify before relying on the result?
Tasks can have different runtimes and arrival bursts. Add operational headroom and validate concurrency limits, failure retries and downstream capacity.
Can I compare different scenarios?
Yes. Change the inputs while keeping units and definitions consistent, and record the assumptions used for each scenario.
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This page provides a calculation tool plus explanatory information so you can understand what the result means and when the underlying method may not fit your situation.