🌐 Internet Speed Calculator
Calculate download time for any file size, convert between all speed units (Mbps, MB/s, Gbps), and see how long it takes to download common files at your connection speed.
Download Times for Common Files
Note: 1 byte = 8 bits. 1 MB/s = 8 Mbps.
Frequently Asked Questions
Your plan speed is the maximum. Real speeds are lower due to: network congestion, server limits, WiFi vs ethernet, router quality, distance from ISP infrastructure, and overhead from network protocols (TCP, headers) consuming ~5-10% of raw bandwidth.
1 byte = 8 bits. So 100 Mbps = 12.5 MB/s. ISPs advertise in Mbps (bits), download managers show MB/s (bytes). Divide your Mbps speed by 8 to get the MB/s download speed you see in your browser.
25 Mbps handles basic browsing and HD streaming for 1-2 users. 100 Mbps supports multiple 4K streams and video calls. 500 Mbps+ is ideal for large households or frequent large file downloads. 1 Gbps future-proofs most home needs.
At 100 Mbps: 100GB = 100,000MB × 8 bits ÷ 100 = 8,000 seconds = 133 minutes (2.2 hours). At 1 Gbps: about 13 minutes. At 25 Mbps: about 9 hours.
Yes. This calculator uses the actual file size. If a 10 GB archive extracts to 30 GB, you download 10 GB but end up with 30 GB on disk. Download time is determined by the file size being transferred, not the decompressed size.
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