Average Request Concurrency Calculator
Average concurrency equals requests per second multiplied by mean duration in seconds. At 80 RPS and 250 milliseconds per request, the average is 20 in-flight requests.
Formula & method
Average concurrency = RPS × mean duration in milliseconds ÷ 1,000.Worked example
| Input | Value |
|---|---|
| Average request arrival rate | 80 s⁻¹ |
| Mean request duration | 250 ms |
| Result | Value |
|---|---|
| Estimated average in-flight requests | 20 |
| Average rounded up to whole slots | 20 |
Compare scenarios
The first input changes while the other example inputs stay fixed. These are arithmetic scenarios, not forecasts.
| Compare scenarios | Average request arrival rate s⁻¹ | Estimated average in-flight requests | Average rounded up to whole slots |
|---|---|---|---|
| −20% | 64 | 16 | 16 |
| Example | 80 | 20 | 20 |
| +20% | 96 | 24 | 24 |
Assumptions & limits
This steady-flow relationship estimates an average, not sufficient peak capacity. Use compatible arrival and duration observations, and allow separately for bursts, queues, retries and each platform’s independent rate limits.
Displayed results are rounded. Calculations use unrounded JavaScript numbers; small floating-point differences are possible.
Works in your browser
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Sources & definitions
Method checked:
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