Internet Breakout Calculator
Compare local internet breakout with hub backhaul to see the bandwidth saved at the data centre edge.
Inputs
Backhauled to the Hub
600.00Mbps
Local Breakout per Site
35.00Mbps
Backhaul per Site
15.00Mbps
Hub Bandwidth Avoided
1,400.00Mbps
Hub Link Utilisation
6.00%
Step by step
Values used
Branch sites = 40 sites; Users per site = 25 users; Internet demand per user = 2 Mbps; Traffic broken out locally = 70 %; Hub internet capacity = 10,000 Mbps
Internet Breakout
hub load = sites × users × per-user demand × (1 − local breakout share); bandwidth avoided is the complement.
Backhauled to the Hub
= 600.00 Mbps
Local Breakout per Site
= 35.00 Mbps
Backhaul per Site
= 15.00 Mbps
Hub Bandwidth Avoided
= 1,400.00 Mbps
Hub Link Utilisation
= 6.00
How it works
Every megabit broken out at the branch is a megabit that never traverses the WAN twice — once inbound to the hub and once outbound to the internet. The remaining share still consumes hub capacity and the hub's security stack. Breakout decisions drive both circuit spend and firewall sizing at the hub; a 70% breakout policy on 40 sites removes over a gigabit of load from the central edge.
Formula
Internet Breakout
hub load = sites × users × per-user demand × (1 − local breakout share); bandwidth avoided is the complement.
- local breakout share
- Fraction of internet traffic sent straight out of the branch
- per-user demand
- Busy-hour internet and SaaS throughput per user
Frequently Asked Questions
How is Internet Breakout calculated?
hub load = sites × users × per-user demand × (1 − local breakout share); bandwidth avoided is the complement. Every megabit broken out at the branch is a megabit that never traverses the WAN twice — once inbound to the hub and once outbound to the internet. The remaining share still consumes hub capacity and the hub's security stack.
Why does Internet Breakout matter?
Breakout decisions drive both circuit spend and firewall sizing at the hub; a 70% breakout policy on 40 sites removes over a gigabit of load from the central edge.
What values do I need to enter?
This calculator takes 5 inputs: Branch sites, Users per site, Internet demand per user, Traffic broken out locally, Hub internet capacity. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.