Cloud Infrastructure
Cloud NAT Bandwidth Cost Calculator
Enter daily outbound traffic volume and AZ count to compute monthly NAT Gateway cost and compare against NAT instance alternatives and VPC endpoint savings.
Calculations run locally in your browserTool
Example — Representative default scenario — daily GB 614 · az count 3.
Monthly data processed
18420 GB
both in+out counted
Bandwidth cost
$828.90
$0.045/GB processed
Hourly NAT cost
$97.20
$0.045/hr × 3 AZs × 720h
Total monthly
$926.10
AWS NAT Gateway
About this tool
Cloud NAT Bandwidth Cost Calculator
The Cloud NAT Bandwidth Cost Calculator computes monthly NAT Gateway cost from traffic volume, compares against NAT instance break-even, and models VPC endpoint savings.
• Determine the traffic threshold where NAT Gateway becomes cheaper than a NAT instance
• Calculate monthly NAT Gateway cost for a high-traffic private subnet
• Model per-AZ NAT Gateway cost for a multi-AZ architecture
• Estimate savings from adding VPC endpoints for S3 and DynamoDB traffic
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Developer-friendly cloud infrastructure. DigitalOcean provides cloud compute, networking, and managed databases with predictable pricing.
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FAQ
What does this tool tell you?
The Cloud NAT Bandwidth Cost Calculator computes monthly NAT Gateway cost from traffic volume, compares against NAT instance break-even, and models VPC endpoint savings.
What affects the result most?
NAT Gateway bandwidth cost: AWS NAT Gateway $0.045/GB processed (both in and out) + $0.045/hour. NAT Gateway vs NAT instance: NAT instance on t3.nano is cheaper below ~30GB/month; NAT Gateway wins above. Traffic distribution: split traffic across multiple NAT Gateways per AZ — eliminates single point of failure.
How should I use the result?
The calculation is deterministic — the same inputs always produce the same output — so the most useful workflow is to vary one input at a time and see which factor moves the result most. That tells you where to focus your attention before committing to a decision.
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