Megabytes per Second to Mebibytes per Second (MB/s to MiB/s)

Formula

MiB/s = MB/s × 0.9536743164063

or MiB/s = MB/s ÷ 1.048576

Derivation from SI units:

• 1 MB/s = 10⁶ B/s = 8 Mbit/s.
• 1 MiB/s = 1,048,576 B/s.
• 1 MB/s = 8000000 bps ÷ 8388608 bps per MiB/s = 0.9536743164063 MiB/s

Both units are defined exactly, so the factor is exact. Megabyte per Second definition: megabyte per second; Mebibyte per Second definition: mebibyte per second.

Worked examples

1. A reading of 25 MB/s converts to 23.84185791 MiB/s.
   25 MB/s × 0.9536743164 = 23.84185791 MiB/s
2. A value of 200 MB/s is 190.7348633 MiB/s.
   200 MB/s × 0.9536743164 = 190.7348633 MiB/s

Where it's used

Megabytes per Second are used for download and copy speeds, while mebibytes per second appear in file copy dialogs. Both measure data transfer rate (bandwidth), so the conversion is a fixed factor.

Megabyte per Second to other data transfer rate units

Frequently asked questions

Sources

• The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7 (SI prefixes); hertz, Table 4.
• Prefixes for binary multiples (kibi, mebi, gibi…, adopted by the IEC and now in IEC 80000-13), National Institute of Standards and Technology , Prefixes for binary multiples.
• The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Section 3, note on binary prefixes.

Last reviewed: 2026-10-15. Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.