AWS Data Transfer Cost Calculator
Model tiered internet egress, cross-AZ, and inter-region transfer — the charges that hide inside EC2-Other until the bill spikes. us-east-1 list pricing.
- No signup
- Instant results
- ~2 min
Rates reviewed
Read the full breakdown — Data Transfer: The Line Item That Breaks Startups covers billing dimensions, traps, and a 30-day cleanup plan.
Your data transfer footprint
us-east-1list rates, pricing as of 2026-07-09. Source: AWS public pricing.
Data transfer in from the internet is free. These three egress paths are where the money goes. The first 100 GB/month of internet egress is free (aggregated across services).
Data transfer out to the internet
Tiered: $0.09/GB up to 10 TB, then $0.085, $0.07, and $0.05/GB at higher volumes. First 100 GB free.
Cross-AZ traffic (same Region)
$0.01/GB in each direction — $0.02/GB round-trip. Chatty microservices across AZs add up fast.
Inter-region transfer
~$0.02/GB out of us-east-1 (replication, cross-region backups, multi-region apps).
Who This Tool Is For
Platform engineers, network architects, and FinOps leads chasing a climbing "EC2-Other" or "data transfer" line in Cost Explorer. If your bill grew without new instances, egress and cross-AZ traffic are the usual suspects.
Why We Built This Tool
AWS data transfer is priced across at least three different mechanisms — tiered internet egress, per-GB cross-AZ, and inter-region — and Cost Explorer smears them across opaque line items. We built this to mirror the us-east-1 rate card we use when we trace transfer cost in client VPC reviews.
What Problem It Solves
- Tiered egress math. Internet egress drops from $0.09 to $0.05/GB as volume climbs — modeled correctly here.
- Cross-AZ visibility. The $0.01-each-way charge that chatty multi-AZ services quietly rack up.
- Inter-region reality. Replication and multi-region designs bill per GB — see it before you commit.
- CloudFront trade-off. Know the crossover where a CDN beats raw data-transfer-out.
Pair with the NAT Gateway and CloudFront calculators, or roll everything into the whole-bill calculator.
Frequently Asked Questions
What data transfer is actually free on AWS?
Data transfer IN from the internet is free. The first 100 GB/month of data transfer OUT to the internet is free, aggregated across services and Regions. Data transfer between services in the same Availability Zone using private IPs is free. Same-AZ, in-to-out through a public IP or NAT is not free.
Where do these prices come from?
AWS us-east-1 list rates as of 2026-07-09. Internet egress is tiered: $0.09/GB up to 10 TB/mo, $0.085/GB for the next 40 TB, $0.07/GB for the next 100 TB, and $0.05/GB beyond 150 TB, after the 100 GB free tier. Cross-AZ transfer is $0.01/GB in each direction. Inter-region out of us-east-1 is roughly $0.02/GB. Confirm against the EC2 On-Demand pricing page before budgeting.
How is cross-AZ traffic billed?
AWS charges $0.01/GB for data sent from one AZ and $0.01/GB for data received in another — so a round trip across an AZ boundary is $0.02/GB. This calculator treats the GB you enter as round-trip traffic at $0.02/GB. Keeping talkative services and their databases in the same AZ is the simplest fix.
Would CloudFront actually be cheaper?
Often, at volume. CloudFront has its own tiered pricing (roughly $0.085/GB for the first 10 TB in North America/Europe) plus a 1 TB/month free tier, and origin fetches from AWS are free. The gated result shows an indicative CloudFront figure for your internet-egress volume — validate against the CloudFront calculator for your edge-location mix.
Does this include NAT Gateway or VPC endpoint charges?
No. NAT Gateway adds $0.045/GB processing on top of transfer — use the NAT Gateway calculator for that. VPC interface endpoints and Transit Gateway also have their own per-GB processing. This tool models pure data-transfer rates.