Download, Upload and Transfer Time Calculators
Transfer time is file size divided by speed, with the awkward parts hidden in the units: ISPs quote bits, files are counted in bytes, and no connection ever runs at its headline rate. These calculators keep the maths honest — showing the clean line-rate figure, a realistic 90% estimate, and how much data moves per hour. Use download time for game updates and large files, upload time for video and cloud backups (home upload is 5–20× slower than download), the drive copy calculator for USB, SSD and network transfers, and the streaming usage page when a data cap is at stake.
Guides
Why a 1 TB Drive Shows 931 GB
The decimal-versus-binary answer in plain language
MB vs MiB: Binary and Decimal Units
What the IEC names mean and when each one applies
Mbps vs MB/s: The 8× Trap
Why your downloads look slower than your plan promises
How Many GB in a TB
1,000 or 1,024 — and what that means for real drives
How Much Storage Do I Need?
Sizing phones, laptops, drives and cloud tiers by use case
What Is Video Bitrate?
Bitrate, quality and file size without the hand-waving
What Internet Speed Do I Need?
Speeds for streaming, calls, gaming and large downloads