100 Mbps = 12.5 MB/s
Divide Mbps by 8 to approximate MB/s before efficiency.
Programming
Download time calculator
Estimate how long an artifact, backup, dataset or Docker image takes to download based on size, speed and real connection efficiency.
Local estimate
Calculate transfer times for large files
Presets de archivo
90%
Referencia: 1 byte = 8 bits. This tool estimates; it does not test your actual connection.
Comparador de velocidades
Uses the current size and efficiency.
| Speed | Estimated time |
|---|---|
| Enter a size to compare speeds. | |
Quick equivalents
1 GiB > 1 GB
GiB uses base 1024; GB uses base 1000.
Publicidad
When to use this calculator
The estimate helps plan downloads, transfers and wait times before moving large files.
Artefactos y despliegues
Estimate how long it may take to download a build, release or Docker image from a registry or pipeline.
Backups y datasets
Compare scenarios for databases, dumps, data files and virtual-machine ISOs.
Planes y objetivos
Calculate whether a nominal connection can complete a download within a time window.
Frequently asked questions
What is the difference between Mbps and MB/s?
Mbps means megabits per second and MB/s means megabytes per second. Since 1 byte equals 8 bits, 100 Mbps equals 12.5 MB/s before losses.
Why does 100 Mbps not mean 100 MB/s?
Because network connections are usually advertised in bits per second. Divide Mbps by 8 to convert to MB/s.
What is the difference between GB and GiB?
GB uses decimal units: 1 GB is 1,000,000,000 bytes. GiB uses binary units: 1 GiB is 1,073,741,824 bytes.
Why does the actual download take longer?
Wi-Fi, the server, congestion, a VPN, latency and provider limits can reduce effective speed.
Does the calculator test my internet connection?
No. It only estimates times from the data you enter. It does not run a speed test or call external services.
What does connection efficiency mean?
It is the percentage of nominal speed you actually use. A 100 Mbps connection at 90% efficiency is treated as 90 Mbps effective.
What speed do I need to download a large file in one hour?
Use Required speed mode, enter the file size and set one hour as the target. The tool returns the approximate nominal speed.
Can I use it for Docker images, backups or datasets?
Yes. The presets include common programming cases such as build artifacts, Docker images, database backups, datasets and ISOs.