Quotas and Limits

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

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

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 writes per second per database	10,000 (up to 10 MiB per second)
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 writes that can be passed to a Commit operation or performed in a transaction	500
Maximum number of field transformations that can be performed on a single document in a Commit operation or in a transaction	500
Time limit for a transaction	270 seconds, with a 60-second idle expiration time

Realtime updates

Limit	Details
Maximum concurrent connections for mobile/web clients per database	1,000,000

Indexes

The following limits apply to single-field indexes and composite indexes:

Limit	Details
Maximum number of composite indexes for a database	200
Maximum number of single-field index exemptions for a database	200
Maximum number of index entries for each document	40,000 The number of index entries is the sum of the following for a document: The number of single-field index entries The number of composite index entries
Maximum size of an index entry	7.5 KiB To see how Cloud Firestore calculates index entry size, see index entry size.
Maximum sum of the sizes of a document's index entries	8 MiB The total size is the sum of the following for a document: The sum of the size of a document's single-field index entries The sum of the size of a document's composite index entries
Maximum size of an indexed field value	1500 bytes Field values over 1500 bytes are truncated. Queries involving truncated field values may return inconsistent results.

Security rules

Limit	Details
Maximum number of exists(), get(), and getAfter() calls per request	10 for single-document requests and query requests. 20 for multi-document reads, transactions, and batched writes. The previous limit of 10 also applies to each operation. For example, imagine you create a batched write request with 3 write operations and that your security rules use 2 document access calls to validate each write. In this case, each write uses 2 of its 10 access calls and the batched write request uses 6 of its 20 access calls. Exceeding either limit results in a permission denied error. Some document access calls may be cached, and cached calls do not count towards the limits.
Maximum function call depth	20
Maximum number of recursive or cyclical function calls	0 (not permitted)
Maximum number of expressions evaluated per request	1,000
Maximum size of a ruleset	64 KB

Monitoring usage

You can view your daily Cloud Firestore usage in the App Engine Quotas page:

Go to the Quotas page