Calculadora de Throughput de Rede
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
eff_Mbps = banda × η; t = file_MB × 8 / eff_Mbps
About this calculator
The Network Throughput Calculator estimates the actual transfer time of a file based on the contracted bandwidth and network efficiency. The effective throughput is calculated by multiplying the nominal bandwidth (in Mbps) by the efficiency factor (η), which represents the percentage of bandwidth actually used. Then, the transfer time is obtained by dividing the file size (in MB) by this throughput, considering the conversion from bytes to bits.
This tool is useful for IT professionals, network administrators, and users who need to plan large file transfers, such as backups, software updates, or data migrations. For example, knowing that your 100 Mbps connection has 80% efficiency, you can predict that a 500 MB file will take about 50 seconds to transfer.
It is important to remember that network efficiency varies depending on technology (fiber, cable, Wi-Fi), congestion, protocol overhead, and equipment. Typical η values range from 70% to 95%. The calculator assumes ideal conditions; in practice, external factors can further reduce throughput.
Use this calculator to compare different scenarios by adjusting bandwidth and efficiency. It does not replace actual speed tests but provides a quick estimate for planning. Remember that internet providers usually advertise bandwidth in Mbps, while files are measured in MB (1 byte = 8 bits).
Frequently asked questions
What does network efficiency (η) mean?
It is the percentage of nominal bandwidth actually used for data transfer, accounting for overhead, congestion, and equipment limitations.
How do I convert MB to Mbps?
Multiply the MB value by 8 to get megabits. For example, 10 MB = 80 Mb.
Why is my actual transfer time longer than calculated?
The calculator uses an estimated efficiency. In practice, factors like Wi-Fi interference, slow routers, or network traffic can further reduce throughput.
What efficiency should I use for fiber optic?
Typically between 85% and 95%, depending on provider quality and infrastructure. Speed tests can help determine the actual value.
Does the calculator work for internet downloads?
Yes, but note that remote servers may limit upload speed, affecting effective throughput.