API Rate Limit Calculator
Requests per second your app needs.
Enter your values
Enter the daily requests you are working with.
Enter the peak factor you are working with.
Enter the retry rate in %.
Enter the your plan limit in rps.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Peak requests per second
- 114.4
- Average RPS
- 27.78
- Headroom on plan
- -14.4%
- Status
- Will be throttled
Quick answer
Peak request rate is far higher than the daily average, so size limits on the peak.
Peak RPS = daily ÷ 86400 × peak factor
At a glance
| What it does | Requests per second your app needs. |
|---|---|
| Category | Technology |
| Inputs needed | Daily requests, Peak factor, Retry rate, Your plan limit |
| Main output | Peak requests per second |
| Formula | Peak RPS = daily ÷ 86400 × peak factor |
| Cost | Free — no sign-up, no download |
How to use the API Rate Limit Calculator
- 1Enter your daily request volume.
- 2Set a peak factor for busy hours.
- 3Add expected retry overhead.
Inputs explained
- Daily requests
- Enter the daily requests you are working with.
- Peak factor
- Enter the peak factor you are working with.
- Retry rate(%)
- Enter the retry rate in %.
- Your plan limit(rps)
- Enter the your plan limit in rps.
Worked example
Using the values the calculator loads with:
Inputs
- Daily requests2400000
- Peak factor4
- Retry rate3 %
- Your plan limit100 rps
Results
- Peak requests per second114.4
- Average RPS27.78
- Headroom on plan-14.4%
- StatusWill be throttled
Frequently asked questions
What peak factor should I use?
3–5× average for consumer apps with a daily usage curve.
Do retries count?
Yes — failed requests usually consume quota too.
What do I need to enter into the API Rate Limit Calculator?
Just 4 values: daily requests, peak factor, retry rate, your plan limit. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the API Rate Limit Calculator work out the answer?
Peak request rate is far higher than the daily average, so size limits on the peak. It applies the formula Peak RPS = daily ÷ 86400 × peak factor and shows the working so you can check each step by hand.
Is the API Rate Limit Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.