What is included in the Cloud Functions free tier?

Cloud Functions provides 2 million invocations, 400,000 GB-seconds of compute, 200,000 GHz-seconds of CPU, and 5 GB of outbound networking per month free. This generous free tier often covers development and low-volume production workloads entirely.

What is the difference between 1st gen and 2nd gen Cloud Functions?

2nd gen Cloud Functions are built on Cloud Run, offering longer timeouts (up to 60 minutes), larger instances (up to 16 GB RAM, 4 vCPU), concurrency (up to 1,000 per instance), and traffic splitting. 2nd gen pricing follows Cloud Run's model. 1st gen is simpler but limited to 9 minutes timeout and single concurrency.

How does memory allocation affect CPU and pricing?

Cloud Functions allocates CPU proportional to memory. At 256 MB you get 0.167 GHz, at 1 GB you get 0.4 GHz, and at 2 GB you get 1 GHz. Higher memory means more CPU and higher per-second cost, but CPU-bound functions run faster, potentially offsetting the increased rate with shorter duration.

GCP Cloud Functions Cost Estimator

ServerlessGCP

Estimate monthly Cloud Functions costs including compute, invocations, and networking.

Cloud Functions Configuration

Invocations per Month

Free tier includes 2M invocations/month

Average Duration (ms)

Memory (MB)

CPU (GHz)

Free tier includes 200K GHz-seconds/month

Network Egress (GB)

Free tier includes 5 GB egress/month. Billed at $0.12/GB after.

Generation

2nd gen runs on Cloud Run and supports concurrency, traffic splitting, and longer timeouts

Include Free Tier (2M invocations + 400K GB-sec + 200K GHz-sec + 5 GB egress/month)

Raw Output

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About This Tool

The GCP Cloud Functions Cost Estimator calculates monthly costs including invocations, compute time (GB-seconds and GHz-seconds), and networking charges. It supports both 1st and 2nd generation Cloud Functions with their different pricing models. The tool accounts for the free tier and helps you compare configurations across memory and CPU allocation settings.

When to Use This Tool

•Estimating monthly costs for an event-driven Cloud Function processing Pub/Sub messages at a known rate.
•Comparing 1st gen vs. 2nd gen Cloud Functions pricing for equivalent workloads.
•Calculating whether a function's usage will stay within the generous Cloud Functions free tier.
•Modeling the cost impact of increasing memory allocation (which also increases allocated CPU) on total bill.

Frequently Asked Questions

What is included in the Cloud Functions free tier?: Cloud Functions provides 2 million invocations, 400,000 GB-seconds of compute, 200,000 GHz-seconds of CPU, and 5 GB of outbound networking per month free. This generous free tier often covers development and low-volume production workloads entirely.
What is the difference between 1st gen and 2nd gen Cloud Functions?: 2nd gen Cloud Functions are built on Cloud Run, offering longer timeouts (up to 60 minutes), larger instances (up to 16 GB RAM, 4 vCPU), concurrency (up to 1,000 per instance), and traffic splitting. 2nd gen pricing follows Cloud Run's model. 1st gen is simpler but limited to 9 minutes timeout and single concurrency.
How does memory allocation affect CPU and pricing?: Cloud Functions allocates CPU proportional to memory. At 256 MB you get 0.167 GHz, at 1 GB you get 0.4 GHz, and at 2 GB you get 1 GHz. Higher memory means more CPU and higher per-second cost, but CPU-bound functions run faster, potentially offsetting the increased rate with shorter duration.

Related Learning Guides

Cloud Functions vs Cloud Run24 min read
Cost Optimization Guide24 min read

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.