Internet Speed Converter: Mbps, MB/s, Gbps
Convert internet and network speeds — megabits per second, megabytes per second, and gigabit explained.
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Internet Speed Converter: Mbps, MB/s, Gbps A 100 Mbps internet plan delivers files at about 12 MB/s, not 100 MB/s. The difference is the bits-to-bytes conversion that ISPs don't advertise in bold type. --- The Core Confusion: Bits vs. Bytes Internet speeds are measured in bits per second (bps). File sizes are measured in bytes. Since 1 byte = 8 bits, there's always a factor-of-8 gap between what your ISP advertises and what your download manager shows. | ISP Speed (Mbps) | Download Speed (MB/s) | 1 GB File Download Time | |-----------------|----------------------|------------------------| | 10 Mbps | 1.25 MB/s | ~13 min | | 25 Mbps | 3.125 MB/s | ~5.3 min | | 50 Mbps | 6.25 MB/s | ~2.7 min | | 100 Mbps | 12.5 MB/s | ~80 sec | | 200 Mbps | 25 MB/s | ~40 sec | | 500 Mbps | 62.5 MB/s | ~16…
Frequently Asked Questions
How do I convert Mbps to MB/s?
Divide Mbps by 8 to get MB/s, because 1 byte = 8 bits. So 100 Mbps = 12.5 MB/s, and 1 Gbps = 125 MB/s. ISPs advertise speeds in bits per second (Mbps, Gbps); file sizes are measured in bytes (MB, GB). This is why a '100 Mbps' connection downloads files at about 12 MB/s, not 100 MB/s.
What is the difference between Mbps and MBps?
Mbps (lowercase b) = megabits per second; MBps (uppercase B) = megabytes per second. Since 1 byte = 8 bits, MBps is always 8× larger than Mbps for the same data transfer rate. Internet service providers use Mbps because the numbers are larger and sound faster. File download progress bars typically show MB/s.
Why is my internet download slower than advertised?
Several factors reduce real-world speeds below the advertised plan: protocol overhead (TCP/IP headers consume 2–5%), distance from the server, ISP congestion during peak hours, Wi-Fi signal strength and interference, your router and device capabilities, and whether the server itself can serve data fast enough. A '100 Mbps' plan realistically delivers 80–95 Mbps under good conditions.
What is a gigabit internet connection?
Gigabit internet means 1,000 Mbps (1 Gbps) download speed. At that speed, a 1 GB file downloads in about 8 seconds (1,000 Mbps ÷ 8 = 125 MB/s). Gigabit is available via fiber-optic connections (FTTH) and is increasingly common in urban areas. Symmetric gigabit means 1 Gbps both upload and download — rare on cable or DSL.
How do I measure my internet speed accurately?
Use a wired Ethernet connection directly to your modem/router (not Wi-Fi) for the most accurate test. Run tests at Speedtest.net or Fast.com during off-peak hours. Run 3–5 tests and average the results. Compare results to your ISP's published speeds. If consistently below 80% of advertised, contact your ISP — you may be entitled to a service adjustment.
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