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Download Time Calculator

Calculate how long it will take to download a file given your internet connection speed. Supports KB, MB, GB, TB file sizes and Kbps, Mbps, Gbps speeds.

Download Time Reference Table

Estimated times at common connection speeds (1 byte = 8 bits).

File Size10 Mbps100 Mbps1 Gbps
1 MB0.8 sec0.08 sec0.008 sec
10 MB8 sec0.8 sec0.08 sec
100 MB1 min 20 sec8 sec0.8 sec
1 GB13 min 20 sec1 min 20 sec8 sec
10 GB2 hr 13 min13 min 20 sec1 min 20 sec
100 GB22 hr 13 min2 hr 13 min13 min 20 sec
1 TB9 days 6 hr22 hr 13 min2 hr 13 min

How to Calculate Download Time

Formula: Download Time = File Size (bits) ÷ Download Speed (bits per second)

Important: file sizes use bytes; speeds use bits. There are 8 bits in 1 byte.

• Example: 1 GB file at 100 Mbps

Step 1: 1 GB = 8,000,000,000 bits

Step 2: 100 Mbps = 100,000,000 bps

Step 3: Time = 8,000,000,000 ÷ 100,000,000 = 80 seconds

Real-world speeds are often lower due to network overhead and server limits.


See also