Cloud Migration Cost Tools
Free tools to plan a data center move: transfer time, one-time cost, and the egress bill you inherit.
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Tools
Data Transfer Time Calculator
See how many days your data takes to transfer, and the bandwidth you need to hit your deadline.
Migration Data Volume Calculator
Find out how much data you really transfer once daily change, waves, validation and retries are counted.
Online vs Offline Transfer Cost Comparator
Compare what each way of moving your data into AWS, Google Cloud or Azure costs, and how long each takes.
Cloud Egress Cost Calculator
See what your monthly traffic costs on AWS, Google Cloud or Azure, by path, and the three biggest fixes.
Private Connectivity Break-Even Calculator
Find the monthly volume at which a private connection costs less than sending the same traffic over the internet.
Architecture Placement Comparator
Compare the monthly data transfer cost of two placements of the same system, path by path, on any cloud.
Cloud Data Transfer Pricing Reference
Look up egress, inter-region, cross-zone, CDN and private connection prices on three clouds, with a change log.
What drives the cost
Moving data into a cloud looks free. AWS, Google Cloud and Azure all charge nothing for inbound data transfer, so a migration plan that prices the network as volume times a rate often prices it at zero. The bill arrives from somewhere else: the transfer service, the private circuit and its carrier, the appliance, and the weeks the old and new systems run side by side.
The first question is time. A link speed is not a transfer rate: the usable share of the link, the hours it is free, protocol overhead and small files each take a cut, and a 450 TB move on a 1 Gbps line takes close to three months. The second is volume. Data keeps changing while it is copied, every wave is synchronized until it cuts over, and failed transfers are resent, so the amount you move is larger than the dataset. When the daily change outruns the link, the sync never catches up at all.
The third question is method. The internet, a private connection, a managed transfer service and a physical appliance each trade cost against days, and the ranking moves with the deadline. AWS closed Snowball to new customers in 2025, so the options are not the ones most guides still list.
The last question outlasts the migration. Once the data is in the cloud, every gigabyte that leaves a zone, a region or the provider is billed every month. Placement decides most of it, which makes it the one cost a migration plan can still change cheaply.
Every rate on these pages is dated and sourced, and every assumption can be edited.
Other categories
Plan the move. Then watch what it costs to run.
Finitizer reads the bill once you are in the cloud and puts every transfer line next to the workload that causes it, so placement mistakes show up in the first month, not the first year.
See how Finitizer works