Mbps to KiB/s
1 megabit per second equals 122.0703125 kibibytes per second exactly.
How to convert megabits per second to kibibytes per second
To convert megabits per second to kibibytes per second, multiply the number of megabits per second by 122.0703125. This factor is exact. To go the other way, multiply kibibytes per second by 0.008192.
kibibytes per second = megabits per second × 122.0703125
Example: 10 megabits per second = 1,220.703125 kibibytes per second.
Network speeds are quoted in bits per second (lowercase b), while file sizes use bytes (uppercase B). Divide Mbps by 8 for MB/s.
About these units
Megabit Per Second (Mbps)
1,000,000 bits per second. The unit of internet connection speeds; 8 Mbps is 1 MB/s.
Megabits entered everyday life through Ethernet. The original 10BASE5 version arrived in 1981 at 10 Mbit/s, Fast Ethernet raised the figure to 100 Mbit/s in 1995, and wireless followed, with 802.11b offering 11 Mbit/s in 1999. Telecommunications engineers had always meant exactly one million bits per second by the megabit, while computer memory vendors were stretching the word mega toward powers of two. That divergence is part of why the IEC later published separate binary prefixes.
Internet providers still sell service in Mbit/s, which is why a plan and a download counter seem to disagree. A byte is eight bits, so 100 Mbit/s is at most 12.5 MB/s, and a 1 GB file needs about 80 seconds at that rate under ideal conditions. Streaming is far lighter: YouTube video at 1080p is listed at roughly 3 to 8 Mbit/s with H.264, and 2160p at 8 to 35 Mbit/s. Real throughput is lower than the line rate because of protocol overhead.
1 megabit per second = 1,000,000 bits per second (exactly).
Sources: Wikipedia: Bit rate (Ethernet, Wi-Fi and streaming rates); NIST: Prefixes for binary multiples; Wikipedia: Megabit
Kibibyte Per Second (KiB/s)
1,024 bytes per second.
File-transfer dialogs and download managers often show a speed in kilobytes per second, and the kibibyte per second is the unambiguous form of that reading. A kibibyte is 1,024 bytes. The kilobyte had long been used for that number, especially for memory, because 1,024 is close to 1,000. In 1998 the IEC introduced kibibyte, KiB, and said that kilobyte should mean 1,000 bytes only.
Real software has been slow to follow. Windows divides sizes by 1,024, so a file of 65,536 bytes appears as 64 KB, while recent versions of macOS show the same file as 66 kB. For a rate, one kibibyte per second is 1,024 bytes per second, which is 8,192 bits per second and about 1.024 decimal kilobytes per second. It is eight times the kibibit per second, since a byte holds eight bits.
1 kibibyte per second = 8,192 bits per second (exactly).
Sources: Wikipedia: Kilobyte; Wikipedia: Data-rate units; NIST: Prefixes for binary multiples
Related conversions
- KiB/s to Mbps (reverse)
- Mbps to bps
- Mbps to Kbps
- Mbps to Gbps
- Mbps to MB/s
- Mbps to Tbps
- Mbps to B/s
- Mbps to KB/s
- Mbps to GB/s
- Mbps to MiB/s
- Mbps to Kibit/s
- Mbps to Mibit/s
- Mbps to Gibit/s
- Bps to KiB/s
- Kbps to KiB/s
- Gbps to KiB/s
- MB/s to KiB/s
See all data transfer rate units.