Kilobytes per Second to Kibibytes per Second (kB/s to KiB/s)

Formula

KiB/s = kB/s × 0.9765625

or KiB/s = kB/s ÷ 1.024

Derivation from SI units:

• 1 kB/s = 1000 B/s = 8000 bit/s.
• 1 KiB/s = 1024 B/s.
• 1 kB/s = 8000 bps ÷ 8192 bps per KiB/s = 0.9765625 KiB/s

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

Worked examples

1. A reading of 25 kB/s converts to 24.4140625 KiB/s.
   25 kB/s × 0.9765625 = 24.4140625 KiB/s
2. A value of 200 kB/s is 195.3125 KiB/s.
   200 kB/s × 0.9765625 = 195.3125 KiB/s

Where it's used

Kilobytes per Second are used for download speeds on slow links, while kibibytes per second appear in linux command-line transfer speeds. Both measure data transfer rate (bandwidth), so the conversion is a fixed factor.

Kilobyte 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.