Download Time Calculator

The Download Time Calculator estimates how long it will take to transfer a file at a given connection speed, automatically converting between the various units of file size and network speed.

Step 1: Enter your file size in the first field and select the appropriate unit — Kilobytes (KB), Megabytes (MB), Gigabytes (GB), or Terabytes (TB). For reference: a typical MP3 song is about 5 MB, a HD movie is 4–8 GB, and a modern game can exceed 100 GB.

Step 2: Enter your connection speed or choose a preset: - Dial-up: 0.056 Mbps (historical) - 3G mobile: 7.2 Mbps - 4G LTE average: ~50 Mbps - Cable broadband: 25–100 Mbps - Fibre optic: 100–1,000 Mbps - WiFi 6: up to 600 Mbps - 5G average: 150–400 Mbps

Step 3: Click 'Calculate'. The result shows estimated time broken down into days, hours, minutes, and seconds for easy reading.

Step 4: Use the comparison table to see how the same file would download across multiple connection types side by side — useful when deciding between broadband plans or checking whether a large cloud backup is practical on your current connection.

Download time calculators are practical tools for anyone who regularly transfers large files over the internet. Common use cases include estimating how long a game or software update will take, planning cloud backups and uploads, comparing broadband plans, and checking whether a large transfer is feasible on a mobile data allowance.

A frequent source of confusion is units: internet speeds are advertised in Megabits per second (Mbps) while file sizes are displayed in Megabytes (MB). Since 1 byte equals 8 bits, a 100 Mbps connection transfers data at about 12.5 MB per second — not 100 MB per second as people often assume.

This calculator handles all conversions automatically and uses binary file-size conventions (1 GB = 1,073,741,824 bytes) to match how operating systems report file sizes, giving you the most accurate estimate possible.