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

Formula

MB/s = MiB/s × 1.048576

Derivation from SI units:

• 1 MiB/s = 1,048,576 B/s.
• 1 MB/s = 10⁶ B/s = 8 Mbit/s.
• 1 MiB/s = 8388608 bps ÷ 8000000 bps per MB/s = 1.048576 MB/s

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

Worked examples

1. A reading of 25 MiB/s converts to 26.2144 MB/s.
   25 MiB/s × 1.048576 = 26.2144 MB/s
2. A value of 200 MiB/s is 209.7152 MB/s.
   200 MiB/s × 1.048576 = 209.7152 MB/s

Where it's used

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

Mebibyte per Second to other data transfer rate units

Frequently asked questions

Sources

• 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.
• The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7 (SI prefixes); hertz, Table 4.

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