Infrastructure & IaC
NAT Gateway Sizing Calculator
NAT gateways fail in two very different ways, and a capacity plan that protects against one does not automatically protect against the other. Connection tracking limits are reached when many clients hold many long-lived connections at once. New-connections-per-second limits are reached when a burst of short-lived outbound requests overwhelms the session setup path. Four inputs above size the gateway against both failure modes and report the headroom left on each.
No data is transmitted — everything runs locallyTool
About this tool
NAT Gateway Sizing Calculator
Size a NAT gateway from concurrent connections, new connections per second, average duration, and burst factor. Browser-only — no data sent.
• Evaluate current state against industry benchmarks
• Identify optimization opportunities
• Support capacity planning and cost decisions
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Sponsored tool. This tool is brought to you by our partners. No data is collected or transmitted.
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FAQ
What does this tool tell you?
Size a NAT gateway from concurrent connections, new connections per second, average duration, and burst factor. Browser-only — no data sent.
What affects the result most?
Size a NAT gateway from concurrent connections, new connections per second, average duration, and burst factor. Browser-only — no data sent.
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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