How this calculator works
One gigabit per second is exactly 1,000 megabits per second, because giga is the SI prefix for one billion and mega is the prefix for one million. Network equipment often uses these decimal prefixes. Storage figures in bytes divide the bit rate by eight, so 1 Gbit/s carries 125 MB/s at the raw rate. A binary mebibyte is larger than a decimal megabyte, so the same rate is a slightly smaller number of MiB/s.
Formula
bits per second = value x F(unit). 1 Gbit/s = 1,000 Mbit/s = 1,000,000,000 bit/s. MB/s = Mbit/s / 8. GB/s = Gbit/s / 8. MiB/s = Mbit/s x 1,000,000 / 8,388,608 = Mbit/s / 8.388608.
Worked example
1,000 Mbit/s is exactly 1 Gbit/s, 125 MB/s, 0.125 GB/s and 119.209 MiB/s. 2,500 Mbit/s is 2.5 Gbit/s, 312.5 MB/s and 298.023 MiB/s.
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Frequently asked questions
Is 1 Gbps the same as 1,000 Mbps?
Yes. Both use decimal SI prefixes, and giga is exactly one thousand times mega, so 1 Gbit/s is 1,000 Mbit/s.
What download speed does 1 Gbps give?
At the raw rate, 1 Gbit/s is 125 MB/s, so a 1 GB file takes about eight seconds. Real transfers are slower because of protocol overhead, congestion and the speed of the server or Wi-Fi link.
Why is the MiB/s figure lower than MB/s?
A mebibyte is 1,048,576 bytes, which is larger than a decimal megabyte of 1,000,000 bytes. Dividing the same bit rate by a larger unit gives a smaller number.