Convert concurrent users into estimated Requests Per Second (RPS) using response time, think time and request flow.
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This calculator uses a practical throughput approximation based on user cycle time. Cycle time combines response time and think time. Throughput grows with users and requests per flow.
Use mode A to estimate RPS from known concurrent users. Use mode B to estimate users from an RPS target.
RPS
62.5
Requests / minute
3,750
Requests / hour
225,000
Cycle time
3.2 s
This is a transparent estimate. Real systems may differ due to queueing, CPU pressure, I/O saturation, retries, network variability and background workloads.
100 users, 2 requests per flow, 200ms response time and 3s think time gives an estimated throughput of 62.5 RPS.
L = λ × W
cycle_seconds = (response_time_ms / 1000) + think_time_seconds
throughput_rps = (users * requests_per_flow) / cycle_seconds
users = (target_rps * cycle_seconds) / requests_per_flowThis calculator uses a Little's Law-inspired approximation where L is concurrency, λ is throughput and W is average time in the system.
No. It is a transparent estimate to accelerate planning and communication.
Average for baseline, p95 for more conservative capacity planning.
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