Free workload planning tool
Calculate how many proxies your monitoring workload needs.
Enter the number of items, the delay between checks, and a request limit you are authorized to use. The calculator shows every formula behind its pool-size and traffic estimates.
- Inputs sent anywhere
- None
- Site-rate presets
- None invented
- Result type
- Capacity estimate, not permission
Local planning workbench
Size a proxy pool from your workload.
URLs, products, feeds, or other authorized targets checked each cycle.
Time between checks for each item. 60,000 ms equals one minute.
Supply your own approved provider, destination, or internal operating limit.
Reserve capacity for uneven scheduling or unavailable endpoints.
Adds an approximate response-payload traffic estimate; request and tunnel overhead are excluded.
Planning estimate
Calculated locally from the values on the left.
Enter the requests-per-proxy planning limit that applies to your authorized workload to see the estimate.
Model assumptions
- Each monitored item creates one check per delay interval, distributed evenly across the minute.
- The estimate assumes successful checks. Add expected retries to the monitored-item workload yourself.
- The per-proxy limit is a planning constraint you supply, not a recommendation or proof that requests are permitted.
- Adding proxies does not change authorization, destination terms, or provider rules.
The proxy calculator formula
Each output follows from the workload you enter. The calculator deliberately asks for your own per-proxy limit because a generic “safe rate” would ignore authorization and current destination rules.
- 01
Checks per minute
items × (60,000 ÷ delay in ms)A 60,000 ms delay checks each item once per minute; a 30,000 ms delay checks it twice.
- 02
Minimum proxy count
ceil(checks/min ÷ approved limit)The result rounds up because a fraction of an endpoint cannot carry the remaining scheduled work.
- 03
Buffered pool
ceil(minimum proxies × (1 + headroom))Headroom covers uneven scheduling and unavailable endpoints; it is not permission to increase traffic.
- 04
Response traffic
checks/min × 60 × average response KBThis optional estimate excludes request bodies, headers, retries, TLS, tunneling, and provider accounting rules.
From monitor delay to pool size
Suppose an approved price-monitoring job checks 120 product URLs every 30 seconds. That creates 240 checks per minute. If the documented operating limit is 60 requests per proxy per minute, the arithmetic minimum is four proxies. Adding 25% headroom produces a five-proxy planning pool.
This example describes capacity, not an instruction to scrape a particular retailer. The operator still needs permission, a documented interface, source-wide pacing, and a stop condition for refusals or quotas.
- Workload
- 120 items × 2 checks/minute
- 240 checks/minute
- Minimum
- 240 ÷ 60 requests/proxy/minute
- 4 proxies
- Headroom
- ceil(4 × 1.25)
- 5 proxies
- 100 KB responses
- 240 × 60 × 100 KB
- 1.44 GB/hour
Find the governing limit
Use an official API quota, written destination permission, a provider constraint, or a deliberately conservative internal budget. Record where the number came from and when it was reviewed.
Model failures explicitly
Retries consume capacity and traffic. Add expected retries to the workload rather than treating failed requests as free, and stop on authorization or policy failures instead of rotating around them.
Validate with observations
Compare the estimate with queue time, success rate, latency, response bytes, and unavailable exits during a small authorized run. Recalculate when the workload or documented limit changes.
Proxy calculator FAQ
How many proxies do I need for monitoring?
Divide the total checks per minute by the allowed requests per proxy per minute, round up, then add operational headroom. The calculator applies that model, but you must supply the limit that actually governs your authorized workload.
What does delay mean in a proxy calculator?
Delay is the time between checks for each monitored item. A shorter delay creates more checks per minute. Enter the value used by your scheduler in milliseconds, not the average response time.
Why does this calculator have no Amazon or Target preset?
A universal “safe” request rate would be misleading. Limits depend on authorization, the documented interface, account state, endpoint, and current destination rules. Use an official API quota, written permission, or your own conservative operating limit.
Does a larger proxy pool prevent rate limits or bans?
No. Pool size changes traffic distribution; it does not change permission, account quotas, terms, or destination controls. Treat a 403, 429, challenge, or policy notice as a reason to stop and review the workload.
Can I use the result to estimate proxy bandwidth?
Add an average response size to estimate response payload per hour. Real billed traffic can be higher because requests, headers, retries, TLS, tunneling, and provider measurement are outside the simple model.
Turn an estimate into a measured route
Probe candidate endpoints
Measure current reachability and latency before adding an endpoint to a pool.
Review residential routing
Compare rotation and sticky-session controls for an authorized workload.
Plan regional monitoring
Keep route evidence, application health, and destination permission separate.
Need a managed pool after the estimate?
Compare residential, datacenter, and mobile networks, then validate the route with a small authorized workload before scaling.
A proxy changes the route. It never changes authorization or destination terms.