How to Use Our AWS NAT Gateway Pricing Calculator

We built the AWS NAT Gateway Pricing Calculator because the official AWS Pricing Calculator is too generic. It doesn’t easily show you the “What If?” scenarios that engineers care about.

Here is how to use our tool to audit your bill.

Step 1: Input Your Region

Pricing varies. Select your region first. Note how sa-east-1 jumps in price compared to us-east-1.

Step 2: Choose Your Architecture

• Centralized: 1 Gateway total. (Cheaper fixed cost, higher cross-AZ/risk).
• Zonal: 1 Gateway per AZ. (Higher fixed cost, free cross-AZ).

Toggle between them. Watch the “Monthly Fixed Cost” jump from ~$32 to ~$98.

Step 3: Estimate Data Processing

Enter your estimated Data Processed (GB).

• Tip: If you don’t know, check Cost Explorer -> “Usage Type: NatGateway-Bytes”.

Step 4: The Break-Even Analysis

This is the magic number. The calculator will tell you: “At X GB of traffic, the Zonal architecture becomes cheaper than Centralized.”

• Why? Because Centralized pays Cross-AZ fees ($0.02/GB). Zonal does not.
• At low traffic, Centralized wins (lower hardware cost).
• At high traffic, Zonal wins (no network tax).

Save Your Report

You can share the URL with your finance team to justify why you need 3 gateways—or why you are deleting 2 of them.

Try the Calculator Now