IPv6 Transition Calculator
Project how long an IPv6 migration will take at the current pace and what remains dual-stacked.
Inputs
Months to Complete
20.0
Current Completion
27.1%
Services Remaining
350
Years of Dual-Stack Operation
1.67
Step by step
Values used
Services in scope = 480 services; Already IPv6-enabled = 130 services; Services migrated per month = 18 services/month
IPv6 Transition
months remaining = ceil(remaining services ÷ services migrated per month); completion = migrated ÷ total.
Months to Complete
= 20.0
Current Completion
= 27.1
Services Remaining
= 350
Years of Dual-Stack Operation
= 1.67
How it works
A linear burn-down turns the current rate into a completion date. The same figure tells you how long you will be paying to operate two stacks in parallel. Dual-stack duration is the real cost of a transition, because every extra month means duplicated ACLs, duplicated monitoring and two failure modes for every service.
Formula
IPv6 Transition
months remaining = ceil(remaining services ÷ services migrated per month); completion = migrated ÷ total.
- remaining
- Services still IPv4-only
- perMonth
- Sustained migration throughput
Frequently Asked Questions
How is IPv6 Transition calculated?
months remaining = ceil(remaining services ÷ services migrated per month); completion = migrated ÷ total. A linear burn-down turns the current rate into a completion date. The same figure tells you how long you will be paying to operate two stacks in parallel.
Why does IPv6 Transition matter?
Dual-stack duration is the real cost of a transition, because every extra month means duplicated ACLs, duplicated monitoring and two failure modes for every service.
What values do I need to enter?
This calculator takes 3 inputs: Services in scope, Already IPv6-enabled, Services migrated per month. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.