The megabit (Mbit) equals 1,000 kilobits or one million bits, most commonly seen in internet speed ratings where ISPs advertise plans in megabits per second (Mbps). It is important to distinguish megabits from megabytes, since a 100 Mbps connection delivers roughly 12.5 megabytes per second of actual download speed. This unit is essential for comparing and understanding network performance.

The gigabit (Gbit) equals 1,000 megabits or one billion bits, used to describe high-speed network connections and data center interconnects. Modern fiber-optic internet plans often reach gigabit speeds, and enterprise networks rely on gigabit-level throughput for handling large volumes of traffic. One gigabit equals 125 megabytes, highlighting the practical difference between bits and bytes.