Guides · Workers KV

Workers KV pricing and limits

KV is cheap to read and expensive to write. Writes, deletes and lists share one meter, and stored GB is billed monthly.

Meter	Included (Paid)	Overage (Paid)	Free
Reads	10M/mo	$0.50 / M	100,000/day
Writes, deletes, lists	1M/mo each	$5.00 / M	1,000/day each
Storage	1 GB	$0.50 / GB-mo	1 GB

Reviewed 2026-10-25 · Official pricing page

Limit

KV key size A Workers KV key can be 512 bytes, and its metadata can be 1,024 bytes, on both plans.
KV value size A Workers KV value can be 25 MiB. You still pay one read or one write per key.
KV read limits 100,000 reads per day on Free.
KV write limits 1,000 writes to different keys per day on Free, and 1 write per second to the same key.
KV storage limits 1 GB on the Free plan.
KV cache TTL minimum Workers KV cacheTtl cannot be set below 30 seconds on either plan.

Workers KV on the Free plan 100,000 reads and 1,000 writes, deletes, and lists per day, plus 1 GB.

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How much does a KV session store cost at 1 million writes? Writes land exactly on the included million, so the write line is $0. Fifteen million session reads are the line that moves. $9.00 on the paid plan in this m...
How much does a KV-backed CMS cost? Published pages are read-through KV. Editors write 2,000 keys. Readers generate 25 million KV reads, which is the expensive shape for KV. $17.40 on the paid...
How much does a multi-tenant API cost at 40 million requests? Forty million requests, 6 ms of CPU, one indexed D1 read, and a tenant lookup in KV. The request overage is 30 million. $33.20 on the paid plan in this model.
How much does an A/B assignment cost in KV? Each new visitor writes one sticky bucket. Returning visitors read it. Model 2 million writes and 18 million reads. $17.00 on the paid plan in this model.
How much does a mobile backend cost at 500,000 daily active requests? Half a million requests a day is 15 million in the month, the same shape as Cloudflare's example 1, with a D1 read on each call. $10.50 on the paid plan in t...
How much does write-heavy KV config cost? A control plane writes 3 million keys and almost nobody reads them. Writes past the included million are $5 per million. $15.00 on the paid plan in this model.