VastCalc
Conversion
Bandwidth Converter
Convert between bits/s, bytes/s, Kbps, Mbps, Gbps, KB/s, MB/s, and GB/s bandwidth units.

Bandwidth Converter

Convert between all common bandwidth and data transfer rate units including Mbps, Gbps, MB/s, and KB/s. Also calculates how long it takes to download 1 GB at the given speed.

Bandwidth (data transfer rate) is often confusing because ISPs advertise in megabits (Mb) while downloads show megabytes (MB). Understanding the difference is essential.

Bits vs. Bytes:

  • 1 byte = 8 bits
  • ISPs advertise in bits: 100 Mbps = 100 megabits per second
  • Downloads show bytes: 12.5 MB/s = 12.5 megabytes per second
  • 100 Mbps = 12.5 MB/s (divide by 8)

SI Prefix Scale:

  • 1 Kbps = 1,000 bps
  • 1 Mbps = 1,000 Kbps = 1,000,000 bps
  • 1 Gbps = 1,000 Mbps = 1,000,000,000 bps

Common Internet Speeds:

  • Basic broadband: 25 Mbps (3.1 MB/s)
  • Fast broadband: 100 Mbps (12.5 MB/s)
  • Gigabit: 1,000 Mbps (125 MB/s)
  • Wi-Fi 6: up to 9,600 Mbps theoretical

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