Cloud Storage Calculator
Turning a Per-GB Rate Into an Actual Monthly Bill
Cloud storage pricing is quoted per gigabyte per month, which makes it easy to compare rates across providers but harder to picture what a specific storage need will actually cost over a subscription term. This calculator multiplies your storage amount by the rate and the number of months, using the decimal (1000-based) GB convention that cloud providers bill under, so the result lines up with what actually appears on an invoice.
The Formula
The cost is a straight multiplication once storage is normalized to gigabytes:
Total Cost = Monthly Cost × Months
Storage entered in MB or TB is first converted to GB using the decimal convention (1 TB = 1000 GB), matching how AWS, Azure, and Google Cloud bill storage — not the 1024-based convention operating systems typically use for local disk sizes.
Where This Calculation Matters
- Budgeting a cloud migration — projecting the ongoing monthly and annual cost of moving a known amount of data off local storage.
- Comparing providers — converting each provider's per-GB rate into a total cost for your specific storage volume, rather than comparing rates in isolation.
- Backup and archive planning — weighing the cost of storing a growing backup set over a multi-year retention period.
- Media and content libraries — estimating the cost of hosting a photo, video, or document library that scales with usage.
Cost Examples at Representative Rates
| Storage | Rate | Monthly Cost | 12-Month Cost |
|---|---|---|---|
| 100 GB | $0.02/GB | $2.00 | $24.00 |
| 500 GB | $0.023/GB | $11.50 | $138.00 |
| 1 TB | $0.02/GB | $20.00 | $240.00 |
| 2 TB | $0.01/GB | $20.00 | $240.00 |
These per-GB rates are illustrative examples, not current provider pricing — actual cloud storage rates vary by provider, storage tier, and region, and change over time, so enter your provider's current quoted rate for an accurate estimate.
How to Use This Calculator
- Enter the Storage Amount and choose its unit (MB, GB, or TB).
- Enter the Price per GB ($) from your provider's pricing page.
- Enter the Duration (months), defaulting to 1 if left blank.
- Select Calculate to see the monthly and total cost.
Related Calculations
Pricing compute time alongside storage? Use the Cloud Cost Calculator. Need to convert the storage amount itself between units first? See the Storage Calculator.