Cloud Migration Cost Calculator
AWS to GCP, Azure to AWS, or any combination. Calculate egress fees and parallel-run compute costs before you commit to a migration.
Migrating from
Migrating to
Data to migrate
Workload size
Parallel-run period
Weeks running both clouds simultaneously
Transfer method
Estimated migration cost
$277
AWS to GCP
one-time cost
does not include engineering time
Cost breakdown
Egress from AWS
$0.090/GB on-demand rate
$92
Parallel-run compute
4 weeks at ~$200/mo (both clouds running)
$185
Ingress to GCP
Free on all providers
Free
Total
$277
Egress uses on-demand list prices as of April 2026 with tiered rates. Parallel-run cost assumes the destination environment runs at the same scale as the source during the overlap period. Ingress is free on all providers. Engineering time, re-architecture, and testing costs are not included. Offline transfer (Snowball, Data Box, Transfer Appliance) waives ~95% of egress at the cost of shipping fees.
How it works
Set source and destination
Choose which cloud you are migrating from and to. Egress fees depend on the source provider. Ingress is free on all three.
Enter your data volume and workload
Egress pricing is tiered: the first 10 TB costs more per GB than larger volumes. Your workload size drives the parallel-run cost.
See total migration cost
The two big line items are egress fees (one-time) and parallel-run compute (weeks where both clouds run simultaneously). Engineering time is not included.
What the data shows
Egress is the hidden migration tax
Moving 10 TB out of AWS costs roughly $920 in egress alone at list price. Most teams do not account for this until they see the bill.
Parallel-run costs double your compute
During a safe migration you run both clouds simultaneously. A medium workload at 4 weeks of overlap adds $740 to your migration budget.
Offline transfer beats online for large datasets
AWS Snowball, Azure Data Box, and GCP Transfer Appliance waive ~95% of egress for a flat shipping fee around $300. Worth it above 5 TB.
Ingress is always free
AWS, GCP, and Azure all charge $0 for data coming in. The cost only flows one way: out of the cloud you are leaving.
Compare costs at your destination
Once you know the migration cost, compare what you will pay monthly at your new provider.
Cloud Cost Estimator →Multi-region egress costs
See how egress and compute costs vary across US, EU, and APAC regions.
Multi-Region Cost Comparison →