Bandwidth-Delay Product Calculator
Calculate the amount of data that can be in flight on your network path to determine optimal TCP window size.
ms
Bandwidth-Delay Product (BDP)
17.88 MB
= 18,750,000 bytes = 150.00 Mbits
This represents the pipe capacity - the amount of data that must be in flight to fully utilize this link.
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CRITICAL: Window Scaling Required
Default TCP window (64 KB) will severely limit throughput:
- Maximum throughput with 64 KB window: 3.50 Mbps
- This is only 0.05% of your available bandwidth!
- Window size needed: ≥ 17.88 MB
- Scale factor required: 512 (2^9)
| Metric | Value | Notes |
|---|---|---|
| Bandwidth | 1.00 Gbps | Available link speed |
| RTT | 150ms | Round-trip time |
| BDP | 17.88 MB | Data in flight for full utilization |
| Min Window Size | 17.88 MB | Absolute minimum |
| Recommended Window | 35.76 MB | 2× BDP (allows for variance) |
| Max Useful Window | 71.53 MB | 4× BDP (diminishing returns beyond) |
| Packets in Flight | 12,949 | Based on 1448 byte MSS |
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ℹ️ Disclaimer
This tool is provided for informational and educational purposes only. All processing happens entirely in your browser - no data is sent to or stored on our servers. While we strive for accuracy, we make no warranties about the completeness or reliability of results. Use at your own discretion.