What Is Cloud Data Egress Cost?
Data egress is the outbound data transfer that leaves a cloud provider's network — for example, content served from object storage to your users on the internet, or data copied from one region to another. Most providers charge per gigabyte (GB) for egress while inbound transfer (ingress) is typically free. This calculator gives a quick estimate of what your outbound transfer will cost based on the volume you move, any free allowance, and your provider's per-GB price.
How to Use the Calculator
Enter the total data transferred out in GB, the monthly free-tier allowance your plan includes (many providers offer a small free amount, e.g. 100 GB), and the price per GB from your provider's pricing page. The tool subtracts the free tier from your transfer, treats the result as billable data (never below zero), and multiplies it by the price to produce your estimated cost.
The Formula Explained
The core equation is $$\text{Cost} = \max\left(\text{Data Out (GB)} - \text{Free Tier (GB)},\ 0\right) \times \text{Price per GB}$$ The billable portion is clamped at zero so that if you stay within the free tier you pay nothing. Egress prices commonly fall in the $0.05–$0.12 per GB range for standard internet egress, though tiered pricing and committed-use discounts can lower this at scale.
Worked Example
Suppose you transfer 1,000 GB out, your plan includes 100 GB free, and the price is $0.09 per GB. Billable data = \(1{,}000 - 100 = 900\) GB. Cost:
$$900 \times \$0.09 = \$81.00$$FAQ
Does this include ingress (inbound) charges? No. Most clouds make data into the cloud free, so this tool only models outbound egress.
What price should I enter? Use your provider's published rate for your region and tier. Pricing varies by provider, destination, and volume tier, so check the official pricing page for accuracy.
What if my transfer is below the free tier? The billable data is floored at zero, so your cost will be $0.00.
