MB Networks
TOOL-11 · Throughput
Network speed converter
Convert between Mbps, Gbps, MB/s, GB/s — and see exactly how fast your interface actually moves data.
Quick values
Common interfaces
Bits per second
network speeds, ISP advertisingBytes per second
file transfer dialogs, disk benchmarksMbps), but file transfers display in bytes (MB/s).
Divide Mbps by 8 to get MB/s — a 100 Mbps connection transfers at ~12.5 MB/s.
Storage interfaces (SATA, NVMe) are typically quoted in bytes per second.
The unit confusion this tool exists to fix
Network speeds are marketed and configured in bits per second (Mbps, Gbps); file transfers and downloads display progress in bytes per second (MB/s, GB/s). The two are related by a factor of 8 (1 byte = 8 bits) — a "1 Gbps" connection tops out around 125 MB/s in a real download manager, not 1,000. Not accounting for this factor of 8 is the single most common reason someone thinks their network is underperforming when it's actually running exactly as advertised.
Where this actually comes up
Comparing an ISP's advertised speed against what a download manager reports, sizing a network link against expected file-transfer throughput, or converting between storage-interface speeds (usually bytes) and network-interface speeds (usually bits) when planning a NAS or backup target — all of these require the exact same bits↔bytes conversion this tool automates.
Why does my “1 Gbps” connection show as ~125 MB/s in my download manager?
Gbps measures bits per second; MB/s measures bytes per second, and there are 8 bits in a byte. 1,000 Mbps ÷ 8 = 125 MB/s — the connection is performing exactly as advertised, the units are just different, and this is normal, not a fault.
Is Mbps the same as MB/s?
No — Mbps (lowercase b) is megabits per second, MB/s (uppercase B) is megabytes per second, and the difference is a factor of 8. This is one of the most commonly confused unit pairs in networking, in large part because the notation looks so similar at a glance.
Why do storage devices and network links use different unit conventions?
Long-standing separate conventions in each industry: storage/file sizes are quoted in bytes because that's the native addressing unit for a filesystem, while networking has quoted link speeds in bits per second since the earliest days of telecom standards. Neither convention is going to change, so converting between them is a permanent, recurring need.
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