Download Time Calculator
Find out exactly how long a download will take based on file size and connection speed.
Quick presets:
Estimated Download Time
How Download Time Is Calculated
Download time = File size in bits / Download speed in bits per second. A 1 GB file has 8,589,934,592 bits. At 100 Mbps (100,000,000 bits/sec), the theoretical time is about 85.9 seconds. Real-world overhead from TCP, protocol headers, and network congestion typically adds 10-20%.
Common Download Times at 100 Mbps
- 1 MB file: ~0.08 seconds
- 100 MB file: ~8 seconds
- 1 GB file: ~1.4 minutes
- 10 GB file: ~14 minutes
- 100 GB file: ~2.3 hours