Cloud Migration Cost Calculator

Estimate labor, downtime, licensing, and network charges. Compare source, target, storage, and parallel-run spending together. Make reliable migration decisions with faster cost visibility today.

Calculator Inputs

Example Data Table

This sample scenario shows how common migration inputs can be organized before running the calculator.

Project Workloads Data TB Source Monthly Target Monthly Hours Downtime Hours Contingency
ERP Rehost 18 12 $5,800 $4,900 280 4 10%
Data Platform Move 32 40 $9,700 $8,300 420 8 15%
Web App Portfolio 24 10 $6,300 $5,100 310 3 12%

Formula Used

Total Labor Cost
(Planning Hours + Migration Hours + Testing Hours) × Engineering Rate
Network Transfer Cost
Network Egress TB × 1024 × Egress Rate per GB
Parallel Run Cost
(Current Monthly Source Cost + Target Monthly Compute Cost + Storage Cost) × Parallel Run Months
Downtime Cost
Downtime Hours × Downtime Cost per Hour
Base One-Time Migration Cost
Labor + Network + Tools + Training + Licenses + Downtime + Security + Retirement + Miscellaneous + Parallel Run
Contingency Cost
Base One-Time Migration Cost × Contingency Percentage
Total One-Time Migration Cost
Base One-Time Migration Cost + Contingency Cost
New Monthly Cloud Cost
Target Monthly Compute Cost + Target Monthly Storage Cost + Network Transfer Cost
First-Year Total Cost
Total One-Time Migration Cost + (New Monthly Cloud Cost × 12)
ROI After One Year
((Annual Current Cost − Annual New Cloud Cost) − Total One-Time Migration Cost) ÷ Total One-Time Migration Cost × 100
Estimated Payback
Total One-Time Migration Cost ÷ Monthly Savings, only when new monthly cost is lower

How to Use This Calculator

  1. Enter the migration project name for your reference.
  2. Fill in workloads, servers, applications, data volume, and user impact.
  3. Provide the current monthly operating cost of the source environment.
  4. Enter expected target compute and storage costs after migration.
  5. Add network transfer assumptions using volume in TB and rate per GB.
  6. Include the number of months where old and new environments run together.
  7. Enter labor hours for planning, migration, and testing.
  8. Provide engineering rate, tool costs, training, licenses, and compliance expenses.
  9. Estimate outage duration and business loss per downtime hour.
  10. Set a contingency percentage to cover risk and uncertainty.
  11. Click the calculate button to generate the results above the form.
  12. Use the CSV and PDF buttons to export your result summary.

Frequently Asked Questions

1. What does this calculator estimate?

It estimates one-time migration spending, monthly cloud operating cost, first-year total cost, cost per workload, ROI, and payback timing.

2. Why include parallel run months?

Parallel running captures the period when legacy and cloud environments operate together. This overlap can materially increase transition cost.

3. Should network transfer be treated as recurring?

That depends on the workload. This model includes transfer cost in monthly cloud expense, which is useful when post-migration egress continues.

4. How is downtime cost used?

Downtime hours multiplied by hourly business loss estimates the financial impact of service interruption during cutover or testing windows.

5. What is contingency percentage?

Contingency adds a risk buffer to base migration spending. It helps cover unknown tasks, schedule drift, unexpected tooling, or rework.

6. Why can ROI be negative?

ROI turns negative when one-time migration spending exceeds first-year operating savings. Longer horizons may still become attractive.

7. When is payback unavailable?

Payback is unavailable when the new monthly environment costs more than the old one, because there are no operating savings to recover migration spend.

8. Can this model support scenario comparisons?

Yes. Run the calculator multiple times with different assumptions for rehost, replatform, or refactor options, then compare exported summaries.

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Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.