What Is Mbps?
Mbps (megabits per second) measures data transfer speed, commonly used for internet connections. Because there are 8 bits in a byte, 100 Mbps equals about 12.5 megabytes per second (MB/s). Download speed and upload speed are often different.
Download Time
Time ≈ file size in megabits ÷ speed in Mbps. A 1 GB file (8,000 megabits) takes about 80 seconds at 100 Mbps, before overhead.
Mbps vs. MB/s
Lowercase “b” means bits; uppercase “B” means bytes.
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Last updated: September 29, 2026. This definition is for general educational purposes only. It is not financial, investment, tax, legal, or medical advice, and it does not recommend any product or course of action. For decisions about your own situation, consult a qualified professional.