Calculadora de Velocidade de Internet
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
t = (MB × 8) / Mbps
About this calculator
The Internet Speed Calculator estimates the time required to download a file based on the file size (in megabytes, MB) and your connection speed (in megabits per second, Mbps). It converts the file size from megabytes to megabits (multiplying by 8) and divides by the connection speed. The result is given in seconds, which can be converted to minutes or hours as needed.
This tool is useful for planning downloads, checking if your contracted speed meets your needs, or comparing different internet plans. For example, you can calculate how long it would take to download a 50 GB game with a 100 Mbps connection, or a 4 GB HD movie with 25 Mbps. It helps manage expectations and avoid frustration with waiting times.
Important caveats: actual download speed is often lower than the contracted speed due to network congestion, distance from the router, interference, or server limitations. Also, units matter: files are measured in bytes (MB, GB), while internet speeds use bits (Mbps). Ignoring this difference can lead to calculation errors. Use the calculator as a reference, not a guarantee.
The formula used is t = (MB × 8) / Mbps. For example, to download a 100 MB file at 50 Mbps: (100 × 8) / 50 = 800 / 50 = 16 seconds. Remember that 1 byte = 8 bits, so conversion is essential. The calculator also supports units like GB and KB, converting them automatically to MB.
Frequently asked questions
Why doesn't the calculated time match the actual download time?
Actual download speed is often lower than the contracted speed due to network congestion, distance from the router, or server limitations. The calculator provides an ideal estimate, not a guarantee.
What is the difference between MB and Mbps?
MB (megabyte) is a unit of file size, while Mbps (megabit per second) measures transfer speed. Since 1 byte = 8 bits, to convert MB to megabits, multiply by 8.
Can I use the calculator for files in GB?
Yes, enter the value in GB and the calculator automatically converts it to MB (1 GB = 1024 MB) before applying the formula.
Does the calculator work for upload speeds?
Yes, the principle is the same: enter the upload speed in Mbps and the file size to estimate the upload time.