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TCP Window & BDP Calculator

Calculate bandwidth-delay product and the ideal throughput ceiling imposed by a receive window. Work locally without uploading network information.

Runs entirely on your deviceNo uploads, accounts, cookies, or personal tracking.

Calculate TCP window budget

Local processing · no input storage

Network tools
Enter the value to evaluate.
Enter the value to evaluate.
Binary KiB = 1024 bytes.

Uses window / RTT with no loss or congestion. The scale shift is the smallest that can represent the required window; it is not an OS tuning command.

Enter your data, then select calculate tcp window budget.

Technical reference: RFC 7323 — TCP window scaling

1. Add your data

Enter your network data or load the worked example.

2. Choose the result

Calculate TCP window budget and review the result and assumptions.

3. Save it locally

Copy the result or download it for your engineering workflow.

About this tool

Use TCP Window & BDP Calculator without an upload

Calculate bandwidth-delay product and the ideal throughput ceiling imposed by a receive window. Work locally without uploading network information.

The operation runs in the current browser tab. Tool input is not included in aggregate analytics, and the standalone download makes no analytics requests.

Network toolsDeveloper tools