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Exponential Backoff & Jitter Calculator

Model retry waits, jitter and deadline ranges locally without sending requests.

exponential-backoff-calculatorLOCAL WORKSPACE

Enabling local controls…

Inputs and settings

Use integers: base 1–600,000 ms, multiplier 1–10, cap 1–3,600,000 ms and retries 0–30. Optional request time: 0–600,000 ms; Retry-After: 0–86,400 seconds; deadline: 0–3,000,000,000 ms.

Processed in this tab without uploading or storing inputs. Each text field is limited to 32 KiB and complete output to 1 MiB; additional format and model limits apply.

Results

Review the settings and run. Editing inputs clears old results.

Processing model and limits

Model up to 30 retries. The capped exponential delay uses none, full or equal jitter; an optional Retry-After floor applies to every wait and can exceed the cap. Fixed request duration is included before each retry. Deadline compares retry start times, inclusive at the boundary. These ranges are not predictions, retry-safety advice or evidence of server behavior. Inputs stay in this tab and local Worker.

Data and model checked: AWS: Exponential Backoff and Jitter ↗RFC 9110: Retry-After ↗

How to use this tool

Load the example, confirm field units and processing rules, then run locally. Editing any input clears the old result. Copy or download the complete output explicitly.

When not to use it

Model up to 30 retries. The capped exponential delay uses none, full or equal jitter; an optional Retry-After floor applies to every wait and can exceed the cap. Fixed request duration is included before each retry. Deadline compares retry start times, inclusive at the boundary. These ranges are not predictions, retry-safety advice or evidence of server behavior. Inputs stay in this tab and local Worker.

Read the guide →