Calculator Inputs
Example Data Table
| Input | Example Value | Notes |
|---|---|---|
| Servers / Instances | 12 | Average active workloads each month. |
| Storage Usage | 8,000 GB | Production block or object storage. |
| Backup Usage | 5,000 GB | Snapshots, recovery copies, and archives. |
| Data Egress | 3,000 GB | Outbound transfer to users or services. |
| Discount | 12% | Reserved use or committed spend savings. |
| Planning Horizon | 3 years | Multi-year TCO visibility for budgeting. |
Formula Used
Monthly Compute Cost = Servers × Compute Cost Per Server
Monthly Storage Cost = Storage GB × Storage Cost Per GB
Monthly Backup Cost = Backup GB × Backup Cost Per GB
Monthly Egress Cost = Egress GB × Egress Cost Per GB
Monthly Labor Cost = Admin Hours × Admin Rate
Base Monthly Cost = Compute + Storage + Backup + Egress + Managed Services + Licenses + Support + Monitoring + Security + Other + Labor
Discounted Monthly Cost = Base Monthly Cost − (Base Monthly Cost × Discount %)
Adjusted Monthly Cost for Each Year = Discounted Monthly Cost × (1 + Growth %)^(Year−1) × (1 + Inflation %)^(Year−1)
Annual Recurring Cost = Adjusted Monthly Cost × 12
Annual Contingency = Annual Recurring Cost × Contingency %
Annual Total = Annual Recurring Cost + Contingency + One-Time Costs for Year 1
Total Cost of Ownership = Sum of all annual totals across the planning period
How to Use This Calculator
- Enter workload size, such as server count, storage, backups, and monthly egress.
- Add managed services, support, licenses, monitoring, security, and other recurring monthly items.
- Provide internal administration hours and the hourly rate for cloud operations labor.
- Enter one-time migration, training, and architecture costs for project setup.
- Apply expected discount, annual growth, inflation, and contingency percentages.
- Select the number of years and include your current annual environment cost for comparison.
- Click the calculate button to view totals, yearly projections, and the chart.
- Use the CSV or PDF buttons to export results for planning or stakeholder reviews.
Frequently Asked Questions
1. What does cloud TCO mean?
Cloud TCO means total cost of ownership. It combines recurring service charges, labor, support, migration, setup, growth, inflation, and contingency to show the full projected cost over time.
2. Why include one-time costs?
One-time costs such as migration, training, and architecture can materially change first-year economics. Excluding them often makes a cloud project appear cheaper than it truly is.
3. Why is data egress important?
Data egress is often overlooked during planning. High outbound traffic can become a significant monthly cost, especially for media, analytics, backup restore, and multi-region applications.
4. What does the discount field represent?
The discount field represents savings from commitments, negotiated pricing, reserved usage, or sustained-use programs. It reduces the base monthly cost before yearly growth and inflation are applied.
5. Should I include internal labor?
Yes. Cloud still needs people for governance, monitoring, patching oversight, security reviews, cost optimization, automation, and vendor coordination. Labor is a real ownership cost.
6. Why does the calculator use growth and inflation?
Growth estimates rising usage over time. Inflation accounts for price drift in services and operations. Together they provide a more realistic multi-year projection than a flat annual number.
7. What is contingency used for?
Contingency provides a buffer for uncertainty, such as temporary scale increases, unplanned storage retention, added tooling, or support upgrades. It helps decision-makers avoid under-budgeting.
8. Can this calculator compare cloud with current costs?
Yes. Enter your current annual environment cost to compare the projected cloud total against your existing spend across the same planning horizon.