Data Transfer Speed Calculator
The Data Transfer Speed Calculator tells you how long it will take to download, upload, or transfer a file given your connection speed. It accounts for the difference between bits and bytes (1 byte = 8 bits) — a common source of confusion when comparing advertised speeds to real-world transfer times.
How to Use This Calculator
- 1
Enter the file size in gigabytes (GB).
- 2
Enter your connection speed in megabits per second (Mbps) — check speedtest.net for your real speed.
- 3
Click Calculate to see the estimated transfer time in minutes.
Frequently Asked Questions
Mbps (megabits per second) is used by ISPs to advertise speeds. MB/s (megabytes per second) is used for file sizes. 1 MB = 8 Mb, so a 100 Mbps connection transfers at ~12.5 MB/s.