Quotas and Limits

This page identifies the request quotas and limits for Cloud Firestore.

Beta limits

The following table shows Cloud Firestore limits that apply only during the beta period.

Limit Details
Maximum writes per second per database (at beta) 2,500 (up to 2.5 MiB per second)
Maximum concurrent connections for mobile/web clients per database (at beta) 100,000

Free quota

Cloud Firestore offers free quota that allows you to get started at no cost. The free quota amounts are listed below. If you need more quota, you must enable billing for your Cloud Platform project.

Quotas are applied daily and reset around midnight Pacific time.

Free tier Quota
Stored data 1 GiB
Document reads 50,000 per day
Document writes 20,000 per day
Document deletes 20,000 per day
Network egress 10 GiB per month

Standard limits

In addition to the beta limits listed above, the following tables show the limits that apply to your usage of Cloud Firestore.

Collections, documents, and fields

Limit Details
Constraints on collection IDs
  • Must be valid UTF-8 characters
  • Must be no longer than 1,500 bytes
  • Cannot contain a forward slash (/)
  • Cannot solely consist of a single period (.) or double periods (..)
  • Cannot match the regular expression __.*__
Maximum depth of subcollections 100
Constraints on document IDs
  • Must be valid UTF-8 characters
  • Must be no longer than 1,500 bytes
  • Cannot contain a forward slash (/)
  • Cannot solely consist of a single period (.) or double periods (..)
  • Cannot match the regular expression __.*__
Maximum size for a document name 6 KiB
Maximum size for a document 1 MiB (1,048,576 bytes)
Constraints on field names Must be valid UTF-8 characters
Maximum size of a field name 1,500 bytes
Constraints on field paths
  • Must separate field names with a single period (.)
  • Must enclose each field name in backticks unless the field name meets the following requirements:
    • The field name contains only the characters a-z, A-Z, 0-9, and underscore (_)
    • The field name does not start with 0-9
Maximum size of a field path 1,500 bytes
Maximum size of a field value 1 MiB - 89 bytes (1,048,487 bytes)
Maximum depth of fields in a map 20

Writes and transactions

Limit Details
Maximum API request size 10 MiB
Maximum write rate to a document 1 per second
Maximum write rate to a collection in which documents contain sequential values in an indexed field 500 per second
Maximum number of documents that can be passed to a Commit operation or written in a transaction 500
Time limit for a transaction 270 seconds, with a 60-second idle expiration time

Indexes

Limit Details
Maximum sum of the sizes of a document's composite index entries 2 MiB
Maximum number of composite indexes for a database 200

Maximum sum of the following for a document:

  • The number of single-field index entries
  • The number of composite index entries
20,000