Cloudflare Workers Cost Estimator

The Free plan includes 100,000 requests per day and 10ms CPU time per request at no cost. There is no monthly fee. Once you exceed either limit, requests are failed (not billed). The Paid plan at $5/month gives you 10M included requests and 30M included CPU ms per month, with charges beyond that.

On the Paid plan, you get 30 million CPU milliseconds free per month. Beyond that, it's $0.02 per million CPU ms. CPU time is wall-clock time spent executing your Worker code — it excludes time waiting for external fetch calls or KV operations. A typical lightweight API call might use 1–5ms of CPU.

KV reads: first 10M free, then $0.50 per million. KV writes/deletes: first 1M free, then $5.00 per million. KV lists: first 1M free, then $5.00 per million. Storage: $0.50/GB stored per month (first 1 GB free). KV is eventually consistent — for strongly consistent data use Durable Objects instead.

Workers runs at the edge (200+ PoPs globally) with sub-millisecond cold starts vs Lambda's 100ms+ cold start. Workers pricing is simpler — per request + CPU ms. Lambda bills per GB-second of memory allocation, which can be wasteful. For lightweight API workloads under 128MB/100ms, Workers is typically 5–10x cheaper than Lambda.

Free is ideal for personal projects, prototypes, or low-traffic internal tools under 100k req/day. Paid ($5/mo) makes sense once you exceed 100k req/day, need reliable SLAs, or use features like Workers KV at scale, Cron Triggers, or larger script sizes (10 MB vs 1 MB). The $5/month base covers up to 10M requests.