Calculadora de Tamanho de Arquivo de Vídeo
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
GB = Mbps × min × 60 / 8 / 1024
About this calculator
This calculator estimates the file size of a video based on bitrate and duration. The result is given in gigabytes (GB) and megabytes (MB). The formula used is: GB = (bitrate in Mbps × duration in minutes × 60) / 8 / 1024. This conversion considers that 1 byte equals 8 bits and 1 GB equals 1024 MB. The tool is useful for planning storage or video uploads.
You can use this calculator when producing videos, streaming, or managing media files. For example, when setting your camera's recording quality, you can estimate how much space a 10-minute video at 50 Mbps will take. It is also useful for calculating the size of downloaded videos or checking if a file fits on a storage device.
Caveats: the bitrate provided should be the average bitrate of the video (including audio, if applicable). Videos with variable bitrate (VBR) may have a different actual size. The formula assumes no significant metadata or overhead. For accurate calculations, consider the codec and compression used. This calculator does not account for separate audio or multiple tracks.
Frequently asked questions
What is bitrate and how does it affect video size?
Bitrate is the amount of data processed per second in a video, measured in Mbps. Higher bitrate means better quality but larger file size.
Does this calculator consider audio in the calculation?
Yes, if you include the audio bitrate in the total bitrate value. Otherwise, it calculates only video.
What is the difference between constant bitrate (CBR) and variable bitrate (VBR)?
CBR keeps bitrate fixed, resulting in predictable size. VBR varies with scene complexity, often producing smaller files with similar quality.
Are the MB and GB results accurate for real files?
It is an estimate. Factors like codec, metadata, and container (e.g., MP4, MKV) can change the final size by up to 5%.
How do I convert the result to MB?
Multiply the GB value by 1024. The calculator already shows both values.