Rex says
Money math without the spreadsheet headache. Plug in your numbers and I'll show you exactly where the dollars land.
Try a scenario
Click to load — tweak from there.Inputs
Result
Monthly egress cost
$441.00
Billable GB after free tier
4,900
Effective $/GB (blended)
$0.0882
Annualized egress cost
$5,292.00
Psst — share this and help Rex grow
One click, a permanent link with your numbers baked in.
How to use this
- 1Enter total monthly egress (GB).
- 2Enter free tier allowance (GB).
- 3Enter size of first paid tier (GB).
- 4Enter first tier rate ($/GB).
- 5Enter rate above first tier ($/GB).
- 6Read your monthly egress cost on the right — it updates as you type.
- 7Hit Share to keep the scenario or send it to someone.
About this calculator
Inbound data transfer is free on every major cloud, but outbound (egress) to the internet is metered and tiered, and it's the line item that blindsides teams serving video, APIs, or file downloads at scale. This calculator applies a simple tiered structure similar to AWS/GCP/Azure: a free allowance, then a first tier priced higher, then a lower rate above a volume threshold. Enter your total monthly egress in GB and it walks through each tier to compute the real blended cost, plus your effective price per GB once the free tier and volume discount are factored in. This is the number product and infra teams actually need when deciding whether to add a CDN in front of an origin — CDN edge pricing is usually cheaper than origin egress once you clear a few terabytes a month, and this tool shows you the origin-only cost to compare against.
Worked example
Using the values the calculator loads with:
Inputs
- Total monthly egress: 5000 GB
- Free tier allowance: 100 GB
- Size of first paid tier: 10000 GB
- First tier rate: 0.09 $/GB
- Rate above first tier: 0.085 $/GB
Results
- Monthly egress cost: $441.00
- Billable GB after free tier: 4,900
- Effective $/GB (blended): $0.0882
- Annualized egress cost: $5,292.00
What each field means
Inputs
- Total monthly egress (GB)
- The total monthly egress used in the calculation, measured in GB. Starts at 5000 GB so you have a working example on load.
- Free tier allowance (GB)
- The free tier allowance used in the calculation, measured in GB. Starts at 100 GB so you have a working example on load.
- Size of first paid tier (GB)
- The size of first paid tier used in the calculation, measured in GB. Starts at 10000 GB so you have a working example on load.
- First tier rate ($/GB)
- The first tier rate used in the calculation, measured in $/GB. Starts at 0.09 $/GB so you have a working example on load.
- Rate above first tier ($/GB)
- The rate above first tier used in the calculation, measured in $/GB. Starts at 0.085 $/GB so you have a working example on load.
Results
- Monthly egress cost
- Returned as a money amount in US dollars and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Billable GB after free tier
- Returned as a whole number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Effective $/GB (blended)
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Annualized egress cost
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
Why is egress so much more expensive than storage?
Cloud providers price ingress at zero and storage cheaply to make it easy to get data in and keep it there, then charge for egress because that's genuinely their variable network cost and also because it creates switching friction — moving petabytes out to another provider or on-prem is expensive by design, not accident.
Does using a CDN change this calculation?
A CDN shifts most delivery traffic to the CDN's edge network, which is usually billed at a lower per-GB rate than cloud origin egress, especially at volume. Origin egress then only applies to cache misses, typically 5-15% of total requests for cacheable content, which can cut your egress bill 70-90%.
Are inter-region and inter-AZ transfers included here?
No, this models internet egress only. Cross-region and cross-availability-zone transfer within the same cloud has its own separate pricing, usually $0.01-$0.02/GB, and cross-region replication for backups or multi-region apps should be modeled separately since it recurs continuously rather than scaling with end-user traffic.
Accuracy and limitations
- Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
- Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.
- This is educational maths, not financial advice. Check anything contractual with the lender or your accountant.
Related tools
Cloud VM Monthly Cost Calculator
Estimate the true monthly bill for a running virtual machine.
Bandwidth Needed for N Concurrent Users
Size your uplink for a target number of simultaneous users.
Video Streaming Bitrate & Storage Calculator
Convert resolution and bitrate into file size, storage cost, and bandwidth needs.
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Cloud Egress Bandwidth Cost Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/cloud-egress-cost
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/cloud-egress-cost" target="_blank" rel="noopener">Cloud Egress Bandwidth Cost Calculator — RevenueLab</a> (2026).</p>
Source: [Cloud Egress Bandwidth Cost Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/cloud-egress-cost) (2026).