Megabits per Second to Kibibytes per Second (Mbps to KiB/s)

Formula

KiB/s = Mbps × 122.0703125

Derivation from SI units:

• 1 Mbit/s = 10⁶ bit/s.
• 1 KiB/s = 1024 B/s.
• 1 Mbps = 1000000 bps ÷ 8192 bps per KiB/s = 122.0703125 KiB/s

Both units are defined exactly, so the factor is exact. Megabit per Second definition: megabit per second; Kibibyte per Second definition: kibibyte per second.

Worked examples

1. A reading of 25 Mbps converts to 3051.757813 KiB/s.
   25 Mbps × 122.0703125 = 3051.757813 KiB/s
2. A value of 200 Mbps is 24414.0625 KiB/s.
   200 Mbps × 122.0703125 = 24414.0625 KiB/s

Where it's used

Megabits per Second are used for internet plans and speed tests, while kibibytes per second appear in linux command-line transfer speeds. Both measure data transfer rate (bandwidth), so the conversion is a fixed factor.

Megabit 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.