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Internet Speed Converter - Mbps to MB/s & All Network Units

Convert internet speed units instantly: Mbps to MB/s, Gbps to MBps, Kbps to Bps and more. Real-time, accurate network speed converter.

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About

Internet service providers advertise speeds in Mbps (megabits per second). Your operating system reports download rates in MB/s (megabytes per second). The difference is a factor of 8. A 100 Mbps connection delivers a theoretical maximum of 12.5 MB/s. Confusing these two units leads to wrong expectations about file transfer times, incorrect server provisioning, and flawed bandwidth budgeting. This converter handles 12 standard units spanning from bps to TB/s, covering both bit-based speed ratings (used by ISPs, network engineers, and protocol specifications per IEEE 802.3) and byte-based data rates (used by operating systems, storage benchmarks, and file transfer protocols). All conversions use the SI/IEC decimal standard where 1 Kbps = 1000 bps, not 1024. The tool approximates ideal throughput. Real-world speeds are reduced by protocol overhead (TCP headers add roughly 3%), latency, and contention ratios.

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Formulas

The conversion normalizes any input to the base unit (bits per second) then divides by the target unit factor:

Rtarget = V × FsourceFtarget

Where V is the input value, Fsource is the source unit's factor in bps, and Ftarget is the target unit's factor in bps.

For the most common case of Mbps → MB/s:

R = V × 1,000,0008,000,000 = V8

This factor of 8 arises because 1 byte = 8 bits. Decimal prefixes follow SI: 1 K = 103, 1 M = 106, 1 G = 109. Binary (IEC) prefixes: 1 Ki = 210 = 1,024.

Reference Data

UnitSymbolTypeBits per SecondBytes per SecondCommon Usage
Bit per secondbpsSpeed10.125Serial protocols, UART
Kilobit per secondKbpsSpeed1,000125Dial-up, VoIP codecs
Megabit per secondMbpsSpeed1,000,000125,000ISP plans, Wi-Fi specs
Gigabit per secondGbpsSpeed1,000,000,000125,000,000Fiber, Ethernet (IEEE 802.3ab)
Terabit per secondTbpsSpeed1,000,000,000,000125,000,000,000Backbone links, submarine cables
Byte per secondB/sData Rate81Low-level I/O
Kilobyte per secondKB/sData Rate8,0001,000Legacy downloads, FTP
Megabyte per secondMB/sData Rate8,000,0001,000,000OS download speeds, SSD benchmarks
Gigabyte per secondGB/sData Rate8,000,000,0001,000,000,000NVMe drives, RAM throughput
Terabyte per secondTB/sData Rate8,000,000,000,0001,000,000,000,000Data center interconnects
Kibibit per secondKibpsSpeed (IEC)1,024128IEC binary standard
Mebibit per secondMibpsSpeed (IEC)1,048,576131,072IEC binary standard
Kibibyte per secondKiB/sData Rate (IEC)8,1921,024Linux kernel, torrent clients
Mebibyte per secondMiB/sData Rate (IEC)8,388,6081,048,576Linux benchmarks, iperf3

Frequently Asked Questions

ISPs measure speed in megabits per second (Mbps). Your browser and OS report download rates in megabytes per second (MB/s). Since 1 byte = 8 bits, divide the ISP figure by 8. So 100 Mbps ÷ 8 = 12.5 MB/s. This is the theoretical maximum; real throughput is lower due to TCP/IP overhead (~3%), routing latency, and network congestion.
SI (decimal) uses powers of 1000: 1 Kbps = 1,000 bps, 1 Mbps = 1,000,000 bps. IEC (binary) uses powers of 1024: 1 Kibps = 1,024 bps, 1 Mibps = 1,048,576 bps. Networking hardware and ISPs use SI. Some Linux tools (iperf3, dd) report in IEC. The discrepancy is ~4.86% at the mega level and grows at higher prefixes.
Convert the speed to MB/s using this tool. Then divide file size (in MB) by the speed. Example: a 700 MB file on a 50 Mbps connection: 50 ÷ 8 = 6.25 MB/s, then 700 ÷ 6.25 = 112 seconds. Add ~10-15% for protocol overhead in practice.
No. This converter provides raw unit conversion based on the mathematical relationship between bits and bytes with SI/IEC prefixes. Real-world throughput is reduced by Ethernet frame headers (18 bytes per frame), IP headers (20 bytes), and TCP headers (20-60 bytes). For Ethernet with a 1500-byte MTU, effective payload efficiency is approximately 94.9%.
Historical convention from telecommunications. Serial communication transmits data one bit at a time over a wire. The baud rate (symbols per second) maps directly to bits per second. This convention carried into Ethernet (IEEE 802.3) and all modern networking standards. Storage, which reads/writes in parallel byte-width blocks, adopted bytes.
Netflix recommends 25 Mbps (3.125 MB/s) for 4K Ultra HD. YouTube suggests 35-45 Mbps for 4K at 60fps with HDR. These are sustained throughput requirements. If multiple devices share the connection, multiply by the number of concurrent streams and add 20% headroom.