MB/s

Units & Measurements abbreviation · Data Unit

MB/s
Stands forMegabytes per second
CategoriesUnits & Measurements

MB/s stands for Megabytes per second, a data unit abbreviation.

Transfer rate measured in megabytes rather than megabits, used for disk and SSD speeds, memory cards, file-copy dialogs and download managers. One MB/s equals 8 Mbps, so a 400 Mbps internet connection downloads at about 50 MB/s.

Example: The microSD card is rated for 160 MB/s reads and 90 MB/s writes.

Usage notes

Also written MBps; only the capital B separates it from Mbps, so check case carefully. SATA SSDs top out around 550 MB/s, PCIe 4.0 NVMe drives reach about 7,000 MB/s and PCIe 5.0 drives more than 12,000 MB/s. Game launchers usually show download progress in MB/s, which confuses users comparing against Mbps internet plans.

More data unit abbreviations

  • GT/s – Gigatransfers per second
  • KB – Kilobyte
  • kbps – Kilobits per second
  • KiB – Kibibyte
  • lpi – Lines per inch
  • MB – Megabyte
  • Mbps – Megabits per second
  • MiB – Mebibyte
  • MP – Megapixel
  • MT/s – Megatransfers per second
  • PB – Petabyte
  • PiB – Pebibyte

See all 36 data unit abbreviations →

Edited by the AbbreviationList.com team. Spotted an error or a missing meaning? Contact us.