// Firebase Dev Tools
Firebase Cost Calculator
Estimate what your Firebase project will cost before you start building it. Firestore, Hosting, Cloud Storage and Authentication, with free tiers and official Google Cloud pricing updated as of June 2026.
Cloud Firestore
Free tier: 50,000 reads/day · 20,000 writes/day · 20,000 deletes/day · 1 GiB storage · 10 GiB network egress/month
Estimated monthly cost
€0,00
nam5/us-central1 pricing: $0.03/100k reads · $0.09/100k writes · $0.01/100k deletes · $0.15/GB storage · $0.12/GB egress beyond free tier.
Firebase Hosting
Free tier: 10 GB storage · 10 GB transfer/month, global CDN included
Estimated monthly cost
€0,00
Beyond the free tier: $0.026/GB extra storage, $0.15/GB extra transfer.
Cloud Storage for Firebase
Always requires Blaze. Google Cloud "Always Free" tier: 5 GB-months storage · 100 GB transfer/month (US regions only)
Estimated monthly cost
€0,00
Standard us-central1 storage ≈ $0.02/GB/month beyond 5 GB free; transfer $0.12/GB beyond 100 GB free. Operations (upload/list) stay negligible for most personal projects.
Firebase Authentication
Email/password, Google, Apple, GitHub and anonymous sign-in are free and unlimited. The only real cost is phone (SMS) authentication.
Estimated monthly cost (SMS only)
€0,00
Indicative per-verification rates: they vary by country and carrier and update periodically. 10 SMS/day on test numbers always stay free.
Total summary
Sum of the estimates entered in the other tabs.
Firestore
€0,00
Hosting
€0,00
Storage
€0,00
Auth (SMS)
€0,00
Estimated total per month
€0,00
FAQ
Is Firebase really free?
The Spark plan is free with generous quotas for Firestore, Hosting and standard Authentication. Cloud Storage, however, has required Blaze (card on file) since February 3, 2026 — even to stay within Google Cloud's free tier.
What happens if I exceed Spark's free limits?
The product is throttled until the next day/month, at no cost. On Blaze, usage continues and you only pay for the overage at pay-as-you-go rates.
How do I avoid surprise bills?
Set a budget with alerts in the Google Cloud console and regularly monitor the Firestore, Hosting and Storage usage dashboards to catch anomalous spikes before they become a bill.
Are these estimates precise to the cent?
They're based on official pricing for the nam5/us-central1 region, updated June 2026. Real prices vary by region, CUD discounts, and different storage classes: use this as a ballpark estimate.
Should I stay on Spark or move to Blaze?
If you only use Firestore, Hosting and standard Authentication under the free quotas, Spark is enough at guaranteed zero cost. If you need Cloud Storage or exceed the quotas, moving to Blaze is required — but staying within Blaze's free quotas still means a zero bill.