Computer & IT
Cloud Data Transfer Cost Calculator
Model compression, CDN and origin internet delivery, free origin egress, inter-region and cross-zone transfer, inbound charges, fixed fees, baseline cost, optimized cost, and savings.
Internet payload after compression-
CDN-delivered traffic-
Origin-delivered internet traffic-
Billable origin internet egress-
Origin internet cost-
CDN delivery cost-
Inter-region transfer cost-
Cross-zone transfer cost-
Inbound transfer cost-
Optimized monthly transfer cost-
Baseline without compression or CDN-
Modeled optimization savings-
Cost per original internet GB-
Decision view
Cloud transfer route map and bill composition
Cloud transfer route map and bill compositionA live topology separates CDN, origin internet, inter-region, cross-zone, and inbound flows, with a cost stack and baseline comparison.
Exact scenario comparisonCDN share of compressed traffic (%) changes while all other entered assumptions remain constant.
| CDN share of compressed traffic (%) | Internet payload after compression | CDN-delivered traffic | Origin-delivered internet traffic | Billable origin internet egress | Origin internet cost | CDN delivery cost | Inter-region transfer cost | Cross-zone transfer cost | Inbound transfer cost | Optimized monthly transfer cost | Baseline without compression or CDN | Modeled optimization savings | Cost per original internet GB |
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How to use Cloud Data Transfer Cost Calculator
- Use provider billing dimensions and one consistent GB convention.
- Map each application flow to internet, CDN, region, zone, or inbound pricing.
- Enter free allowances only where the provider actually applies them.
Calculator guide
Understanding Cloud Data Transfer Cost Calculator
Cloud transfer charges depend on both byte volume and route. Compression changes how many bytes move; CDN offload, inter-region links, cross-zone paths, inbound traffic, free tiers, and fixed fees determine which rates apply.
Detailed calculation process
Detailed cloud route-volume and transfer-cost calculation
The default case starts with 8,500 GB of internet-bound data, applies 20% compression, then routes 35% of the compressed payload through a CDN.
General formula: V_c=V_i*(1-r_c)V_cdn=V_c*r_dV_o=V_c-V_cdnV_b=max(0,V_o-F)C_o=V_b*p_oC_cdn=V_cdn*p_cdnC_r=V_r*p_rC_z=V_z*p_zC_in=V_in*p_inC=C_o+C_cdn+C_r+C_z+C_in+C_fC_0=V_i*p_o+C_r+C_z+C_in+C_fS=C_0-C Compression changes bytes, CDN share changes route, and the origin free allowance is applied only after both optimizations. Internal and inbound routes remain independent.
What each symbol means
Worked substitution with the default inputs
The default optimized route costs $861.60 per month, $233.40 below the stated baseline.
Worked situations
Practical examples
- Compressing 8,500 GB by 20% leaves 6,800 GB of delivered internet payload.
- A 35% CDN share routes 2,380 GB through CDN and leaves 4,420 GB at origin before the 100 GB free tier.
Better inputs
Useful tips
- Inspect architecture for unnecessary cross-zone chatter and duplicate replication.
- Compare committed and tiered pricing separately from list-rate scenarios.
- Use billing exports to reconcile modeled route volumes with actual charge categories.
Before relying on the result
Limitations and common mistakes
- The model uses flat user-entered rates and one monthly free allowance.
- Taxes, tier thresholds, protocol overhead, cache fill, NAT, load balancer, request, acceleration, and support charges are excluded.
- Provider definitions of GB, direction, region, and eligible free traffic vary.
Reference
Key terms
- Origin egress
- Internet-bound data delivered directly from the cloud origin.
- CDN offload
- Compressed internet traffic served through the entered CDN route.
- Cross-zone transfer
- Data crossing availability-zone boundaries at the entered rate.
Important note
Cloud pricing and topology change. Confirm current provider documentation, negotiated rates, service-specific exceptions, security architecture, and billing exports before implementation.
Frequently asked questions
Why is inbound listed when its rate is zero?
It keeps the route inventory complete and supports providers or architectures that do charge for the entered inbound path.
Does CDN offload reduce inter-region traffic?
Not in this model; internal routes are entered independently.
Can I use provider GiB rates?
Yes if every volume and rate follows the same billing convention.