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How much does presence cost if the WebSocket cannot hibernate?

Scenario · durable-objects

Reviewed 2026-10-25 · against the official Cloudflare pricing pages listed under Sources

Try this scenarioLoads these inputs into the calculator so you can change them.

A socket that cannot hibernate bills wall time for the 128 MB allocation. This model puts 1.2 million GB-s on the duration meter.

On the Paid plan this model comes to $17.50. The other plan, with the same inputs, comes to $0.00. The 30-day month is the same length R2 uses in its storage example. Daily free caps are not monthly pools.

Durable Object duration rounds up hard

Paid duration includes 400,000 GB-s and then costs $12.50 per million GB-s. Billable GB-s round up to the next million, so 500,000 billable GB-s cost $12.50. You are billed for the 128 MB allocation while the object is active and cannot hibernate. This calculator does not convert wall-clock seconds into GB-s.

Read this before you trust the total

Free plan lines at $0 can still be an outage: error 1027, error 1102, or a D1 quota error. R2 above its monthly free tier is billed on both plans. Durable Object requests round up to the next million, as in Cloudflare's own Example 1, which bills 500,000 requests as 1 million.

This model

$17.50 · Paid

Workers Paid minimum
$5.00

The $5 is an account minimum for Workers Paid, not a per-product fee. Included usage sits inside it.

Durable Object duration
$12.50

1,200,000 used, 400,000 included. 800,000 billable, rounded up to 1,000,000. Exact charge $12.50, shown as $12.50. Paid duration includes 400,000 GB-s, then $12.50 per million GB-s. Billable GB-s round up to the next million. 500,000 billable GB-s cost $12.50. Duration is billed for the 128 MB allocated to the object, not for the memory you touch. Hibernating WebSockets are not billed for idle time. This calculator asks for GB-seconds directly because the docs do not publish a seconds-to-GB-s conversion factor.

Assumptions

  • A 30-day month and steady traffic across it.
  • Rates as published on 2026-10-25; taxes excluded.
  • The Workers Paid plan has a $5 monthly minimum. It is charged even if you use nothing, and it covers the included allowances.
  • Durable Object duration adds $12.50 (71% of the bill): you used more than the 400,000 included.

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Sources