How this calculator works
A worker is assumed occupied for the whole entered request time. The model excludes queueing, idle browser connections, database bottlenecks, burstiness and network limits. Do not interpret the result as a concurrent TCP connection limit.
The formula
Ideal requests/s = workers / request time in seconds. Active users = floor(requests/s / requests/s/user).A quick example
Twenty workers occupied for 200 ms each imply 100 requests/s. At 0.2 requests/s per active user, the simplified capacity is 500 active users.
How to use this calculator
- Choose the settings that match your scenario, using the units shown beside each field.
- Enter average requests per second per active user, average occupied worker time per request (ms), available request workers.
- Calculate, then review the method and assumptions alongside the results.
A few common questions
Why must requests per user include a time unit?
A capacity calculation needs a rate. Five requests per minute per user is 5/60, or about 0.0833 requests per second.
Does a larger worker pool always increase capacity?
No. CPU, database contention and memory pressure can reduce throughput when concurrency is too high.