What Is the Cloud Storage Cost Calculator?
This tool estimates how much you will pay each month and year to store data in the cloud. Most providers (AWS S3, Google Cloud Storage, Azure Blob, Backblaze B2, and others) charge two main components: a per-gigabyte storage fee for the data you keep, and a per-gigabyte egress fee for the data you transfer out. By combining both, this calculator gives you a realistic monthly and annual estimate so you can compare providers and budget accurately.
How to Use It
Enter the total storage you keep in GB, the storage price per GB per month, the volume of data you transfer out (egress) each month in GB, and your egress price per GB. The calculator instantly shows the storage cost, egress cost, monthly total, and projected yearly total. Pricing varies by provider and region, so check your provider's current price list and plug in those numbers.
The Formula Explained
The math is straightforward: $$\text{Monthly Cost} = (\text{Storage GB} \times \text{Storage Price}) + (\text{Egress GB} \times \text{Egress Price})$$ The storage term covers data at rest, the egress term covers data leaving the cloud. The yearly estimate simply multiplies the monthly figure by 12. Note that this model ignores request/API charges, retrieval fees on cold-storage tiers, and free-tier allowances, which can be added or subtracted from the result.
Worked Example
Suppose you store 1,000 GB at $0.023/GB and transfer out 100 GB at $0.09/GB. Storage cost = \(1000 \times 0.023 = \$23.00\). Egress cost = \(100 \times 0.09 = \$9.00\). Monthly total = \(\$32.00\), and yearly total = \(\$32.00 \times 12 = \$384.00\).
FAQ
What is egress? Egress is data downloaded or transferred out of the cloud to the internet or another region. Most providers charge for egress but not for ingress (uploads).
Does this include API request fees? No. Per-request (PUT/GET/LIST) charges and retrieval fees for archival tiers are excluded — add them separately if they apply to your workload.
Why is my real bill different? Free tiers, tiered volume discounts, minimum storage durations, and region-specific pricing all affect the final invoice. Use this as a fast planning estimate, not an exact quote.
