How are Firestore document reads priced?

Firestore charges per document read operation. Point reads of a single document, queries that return N documents (charged as N reads), and snapshot listeners that detect changes all count. The free tier includes 50,000 reads per day, after which charges apply per 100,000 additional reads.

Is there a free tier for Firestore?

Yes. Firestore provides a daily free quota of 50,000 reads, 20,000 writes, 20,000 deletes, 1 GiB of stored data, and 10 GiB of network egress per month. The estimator shows your costs above these free tier thresholds so you can see exactly when paid usage begins.

GCP Firestore Cost Estimator

StorageGCP

Estimate Firestore costs based on document reads, writes, storage, and bandwidth.

Firestore Configuration

Firestore Mode

Both modes share the same pricing. Native mode supports real-time listeners; Datastore mode is for legacy compatibility.

Document Reads Per Day

Free tier: 50,000 reads/day. Priced at $0.06 per 100K reads.

Document Writes Per Day

Free tier: 20,000 writes/day. Priced at $0.18 per 100K writes.

Document Deletes Per Day

Free tier: 20,000 deletes/day. Priced at $0.02 per 100K deletes.

Stored Data (GB)

Free tier: 1 GB. Priced at $0.18/GB/month.

Network Egress (GB/month)

GCP standard egress pricing: $0.12/GB (first 1 TB), $0.11/GB (1-10 TB), $0.08/GB (10+ TB).

Include Free Tier

Raw Output

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About This Tool

The GCP Firestore Cost Estimator calculates your expected monthly Firestore bill based on document reads, writes, deletes, stored data volume, and network egress. It supports both Firestore Native mode and Datastore mode pricing, covering the nuances of each. Input your daily operation counts and storage projections to get a granular cost breakdown that separates document operations, storage, and bandwidth charges. This tool is particularly valuable for mobile and web app developers building on Firebase who need to forecast costs before usage scales unexpectedly.

When to Use This Tool

•Forecasting Firestore costs for a mobile app that performs heavy real-time reads via snapshot listeners.
•Estimating the cost impact of migrating from Datastore mode to Firestore Native mode.
•Modeling how a spike in user sign-ups would affect document write costs during a product launch.
•Budgeting bandwidth costs for a Firestore-backed API serving data to clients outside GCP.

Frequently Asked Questions

How are Firestore document reads priced?: Firestore charges per document read operation. Point reads of a single document, queries that return N documents (charged as N reads), and snapshot listeners that detect changes all count. The free tier includes 50,000 reads per day, after which charges apply per 100,000 additional reads.
Is there a free tier for Firestore?: Yes. Firestore provides a daily free quota of 50,000 reads, 20,000 writes, 20,000 deletes, 1 GiB of stored data, and 10 GiB of network egress per month. The estimator shows your costs above these free tier thresholds so you can see exactly when paid usage begins.

Disclaimer: This tool runs entirely in your browser. No data is sent to our servers. Always verify outputs before using them in production. AWS, Azure, and GCP are trademarks of their respective owners.