The Cloud Backup Unit Cost Estimator converts total cloud backup spending into a cost per protected terabyte. That unit rate makes it easier to compare service options, track efficiency as the protected estate changes, or allocate shared infrastructure costs to teams.
The main result is the monthly cost per TB. The supporting figures extend that rate across the selected comparison period, giving a consistent basis for comparing contracts with different billing terms or for monitoring changes in unit economics over time.
1. Enter monthly service cost
Use recurring spend associated with the protected capacity being measured.
2. Enter protected capacity
Use terabytes on the same scope as the cost input.
3. Set a comparison period
Choose how many months you want to extend the current run rate for planning or contract comparison.
4. Read monthly unit cost
The primary result divides monthly cost by protected TB.
5. Review period cost
Use the period totals to compare alternatives on the same time horizon.
Monthly unit cost per TB = Monthly service cost ÷ Protected capacity (TB)
Period cost = Monthly service cost × Months. Period cost per TB = Period cost ÷ Protected capacity. The model assumes the protected capacity and monthly cost remain constant during the selected comparison period.
The result normalizes recurring service spend by protected capacity so alternatives can be compared on a common unit basis.
Unit cost is only comparable when the numerator and capacity scope include the same services, redundancy level, retention policy, and billing components.
Given: Monthly service cost = $2,400; protected capacity = 60 TB; comparison period = 12 months.
Calculation: Monthly unit cost = $2,400 ÷ 60 = $40/TB. Period cost = $2,400 × 12 = $28,800. Period cost per TB = $28,800 ÷ 60 = $480/TB.
Result: The current service costs $40 per protected TB per month.
Use the capacity basis that best matches the cost you are dividing. If the vendor bills on stored or replicated TB, that billed basis usually produces the most comparable unit cost.
Yes, if you want an all-in unit cost and those charges belong to the same protected scope. Keep the definition consistent across comparisons.
If protected capacity falls while cost stays fixed, the cost per TB increases. Unit cost reflects both spending and the denominator.
No. It extends the current monthly run rate and current capacity unchanged. Use a cost forecast or capacity needs estimator for growth scenarios.
Use the same protected capacity definition, time period, currency, and included cost components for both providers before comparing unit cost.