How to use the Download Time Calculator
- Enter file size and connection speed.
- Adjust overhead to taste.
- Read the estimated time.
About this tool
Will a 50 GB game finish overnight? How long will a 2 TB backup take to upload? Divide the size in bits by the speed in bits per second — then add overhead. TCP/IP headers, encryption and Wi-Fi inefficiency typically consume 5–15% of advertised bandwidth, which is why the overhead slider defaults to 10%.
Frequently asked questions
Why is my real download slower?
The server, Wi-Fi signal, congestion and VPNs all cap throughput below your plan speed.
Upload vs download?
Many plans are asymmetric — enter your upload speed for uploads.