Network Efficiency Calculator
Calculate the ratio of useful data throughput to total bandwidth consumed.
About Network Efficiency Calculator
Network efficiency measures what fraction of consumed bandwidth carries useful application data versus protocol overhead and retransmissions. Framing efficiency accounts for headers (Ethernet, IP, TCP), preamble, and inter-frame gap. Retransmissions further reduce efficiency by consuming bandwidth to resend already-sent data.
Formula
Overall efficiency
efficiency = (payload / total_frame) * (1 - retransmission_rate)
- P
- Payload bytes
- F
- Total frame bytes on wire
- r
- Retransmission rate (fraction)
Worked example
With the default values below, Network Efficiency Calculator returns Overall Network Efficiency of 93.98%. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Payload Data per Frameminimum 1 bytes
- 1,460 bytes
- Total Frame Size (on wire)minimum 1 bytes
- 1,538 bytes
- Retransmission Rateaccepts 0–100 %
- 1 %
Results
- Overall Network Efficiency
- 93.98%
- Framing Efficiency
- 94.93%
- Overhead per Frame
- 78 bytes
Step by step
- 1Framing efficiency= 94.93%
- 2Retransmission factor= 0.99
- 3Overall efficiency= 93.98%
Assumptions and limits
- The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
What causes low network efficiency?
Small payload sizes (many small packets means proportionally more header overhead per byte of data), high retransmission rates from lossy links, and additional encapsulation layers (VPN, VXLAN) all reduce efficiency below the theoretical maximum.
What is typical Ethernet efficiency for TCP traffic?
With 1460-byte TCP payloads in standard 1518-byte Ethernet frames (plus 20 bytes preamble/IFG), framing efficiency is about 95%. Actual efficiency is somewhat lower due to TCP ACKs, retransmissions, and smaller-than-MSS segments.