What is included in the Azure Functions free tier?

The Consumption plan includes 1 million executions and 400,000 GB-seconds of compute per month at no cost. A GB-second is measured as the memory allocated to the function (in GB) multiplied by execution duration (in seconds). This free grant applies per subscription.

When should I use the Premium plan?

Use Premium when you need pre-warmed instances (to avoid cold starts), VNet integration for accessing private resources, longer execution timeouts (unlimited vs. 10 minutes on Consumption), or more powerful instances. Premium charges for pre-warmed instance time even when idle.

Can I mix hosting plans for different functions?

Yes. You can have multiple Function Apps, each on a different hosting plan within the same subscription. This lets you put latency-sensitive functions on Premium, high-volume batch functions on Consumption, and always-on functions on Dedicated.

Azure Functions Cost Estimator

ServerlessAzure

Estimate monthly Azure Functions costs for Consumption, Premium, and Dedicated plans.

Azure Functions Configuration

Hosting Plan

Executions per Month

Free tier includes 1M executions/month

Average Duration (ms)

Memory (MB)

Include Free Tier (1M executions + 400,000 GB-s/month)

Raw Output

Output will appear here...

About This Tool

The Azure Functions Cost Estimator calculates monthly costs across all three hosting plans: Consumption, Premium (Elastic Premium), and Dedicated (App Service). The Consumption plan charges per execution and GB-second with a generous free tier, while Premium provides pre-warmed instances and VNet integration, and Dedicated runs on standard App Service infrastructure. The tool compares all plans side-by-side.

When to Use This Tool

•Estimating whether a function's execution volume will stay within the Consumption plan free tier.
•Comparing Consumption vs. Premium plan costs for a function that needs VNet access and consistent low latency.
•Calculating the break-even point where Dedicated plan becomes cheaper than Consumption for high-volume functions.
•Modeling cost impact of function execution duration and memory allocation changes.

Frequently Asked Questions

What is included in the Azure Functions free tier?: The Consumption plan includes 1 million executions and 400,000 GB-seconds of compute per month at no cost. A GB-second is measured as the memory allocated to the function (in GB) multiplied by execution duration (in seconds). This free grant applies per subscription.
When should I use the Premium plan?: Use Premium when you need pre-warmed instances (to avoid cold starts), VNet integration for accessing private resources, longer execution timeouts (unlimited vs. 10 minutes on Consumption), or more powerful instances. Premium charges for pre-warmed instance time even when idle.
Can I mix hosting plans for different functions?: Yes. You can have multiple Function Apps, each on a different hosting plan within the same subscription. This lets you put latency-sensitive functions on Premium, high-volume batch functions on Consumption, and always-on functions on Dedicated.

Related Learning Guides

Functions Hosting Plans22 min read
Cost Management 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.