Calculator Inputs
Use editable rates for planning. Default provider values are examples, not live quotations.
Example Data Table
| Scenario | Internet TB | Cross-Region TB | Inter-Zone TB | CDN Offload | Discount | Growth |
|---|---|---|---|---|---|---|
| Media Streaming Platform | 48.00 | 8.00 | 6.00 | 55% | 12% | 7% |
| Analytics API Cluster | 12.00 | 3.00 | 2.00 | 35% | 8% | 6% |
| Backup and Replication Mesh | 6.00 | 14.00 | 9.00 | 10% | 5% | 4% |
Formula Used
Internet Input GB = Internet Egress TB × 1024 × (1 + Redundancy Overhead%)
Internet After Offload GB = Internet Input GB × (1 - CDN Offload%)
Billable Internet GB = max(Internet After Offload GB - Free Tier GB, 0)
Cross-Region GB = Cross-Region TB × 1024 × (1 + Redundancy Overhead%)
Inter-Zone GB = Inter-Zone TB × 1024 × (1 + Redundancy Overhead%)
Request Units = (Requests in Millions × 1,000,000) ÷ 10,000
Subtotal = (Billable Internet GB × Internet Rate)
+ (Cross-Region GB × Cross-Region Rate)
+ (Inter-Zone GB × Inter-Zone Rate)
+ (Request Units × Request Rate)
After Discount = Subtotal - (Subtotal × Commit Discount%)
Pre-Tax Total = After Discount + (After Discount × Support Surcharge%)
Monthly Total = Pre-Tax Total + (Pre-Tax Total × Tax%)
Annual Total = Monthly Total × 12
Projected Month n = Monthly Total × (1 + Growth%)^(n - 1)How to Use This Calculator
- Choose a provider profile or select Custom for manual rate planning.
- Enter monthly internet egress, cross-region traffic, and inter-zone movement in terabytes.
- Add request volume, CDN offload percentage, and any free outbound allowance.
- Set commercial factors such as commit discounts, support markup, taxes, and growth.
- Adjust the rate fields if your contract differs from the example assumptions.
- Press Calculate Cost to show the results above the form.
- Use the CSV and PDF buttons to export the calculated summary.
FAQs
1. What is cloud egress cost?
Cloud egress cost is the charge for data leaving a cloud environment. It usually covers internet delivery, regional transfer, zonal movement, and sometimes request-driven access fees.
2. Why does CDN offload matter here?
CDN offload reduces origin traffic by serving cached content closer to users. Less origin traffic means fewer billable outbound gigabytes and usually lower monthly transfer cost.
3. What is the difference between inter-zone and cross-region transfer?
Inter-zone transfer moves data between availability zones inside one region. Cross-region transfer moves data between different regions, which often costs more because the path is longer and more operationally complex.
4. Are the default provider rates live prices?
No. They are editable planning assumptions. Real prices vary by contract, destination, product tier, region, and date, so replace defaults with your current rate card.
5. Why are request fees included?
Some storage and delivery services bill both transferred data and request activity. High-frequency workloads can accumulate meaningful access charges even when transferred data volume looks moderate.
6. How does redundancy overhead affect the total?
Redundancy overhead models extra replicated or duplicated traffic caused by resilience design. Higher overhead increases total transferred gigabytes and lifts the cost base before discounts.
7. Can I include taxes and support charges?
Yes. The calculator applies support surcharge after discounts, then applies tax to the pre-tax total. This helps reflect finance-ready monthly estimates.
8. Why should I project monthly growth?
Growth projection shows how a manageable bill today may scale into a larger spend later. It is useful for budgeting, traffic planning, and contract negotiation.