How much does a Durable Object chat room cost?
Scenario · durable-objects
Messages are RPC or WebSocket billing events on the room object. Hibernation is assumed, so duration stays at 10,000 GB-s while requests hit 4 million.
On the Paid plan this model comes to $5.45. 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.
Each RPC session is a request
Paid Durable Objects include 1 million requests and then charge $0.15 per million. The page rounds every compute dimension up to the next billing unit and demonstrates it for GB-s. Request rounding to 1 million is applied here as an inference from that rule.
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
$5.45 · Paid
The $5 is an account minimum for Workers Paid, not a per-product fee. Included usage sits inside it.
4,000,000 used, 1,000,000 included. 3,000,000 billable, rounded up to 3,000,000. Exact charge $0.45, shown as $0.45. Paid Durable Object requests include HTTP, RPC sessions, WebSocket billing messages, and alarms. 1 million are included, then $0.15 per million. Billable requests round up to the next million. Cloudflare's own Example 1 bills 500,000 billable requests as 1 million, $0.15.
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 requests adds $0.45 (8% of the bill): you used more than the 1,000,000 included.
Sources
- Workers pricingOfficial
- Durable Objects pricingOfficial