Mbps stands for Megabits per second and MB/s stands for Megabytes per second. Since 1 Byte = 8 bits, 1 MB/s equals 8 Mbps. Internet service providers (ISPs) typically advertise speeds in Mbps, while file transfer rates and download managers display speeds in MB/s. To convert Mbps to MB/s, divide by 8.
Download time is calculated using the formula: Time (seconds) = File Size (bytes) ÷ Speed (bytes per second). Both the file size and connection speed are first converted to the same base unit, then divided. The result is displayed in seconds, minutes, hours, and a natural language format.
ISPs advertise theoretical maximum speeds under ideal conditions. Real-world speeds are typically lower due to network congestion, Wi-Fi signal quality, router limitations, server load, and TCP/IP protocol overhead. A common expectation is 60–80% of the advertised speed in everyday use.
This tool uses the SI decimal system: 1 Kbps = 1,000 bits/s, 1 Mbps = 1,000,000 bits/s, 1 Gbps = 1,000,000,000 bits/s. Similarly, 1 KB = 1,000 bytes, 1 MB = 1,000,000 bytes, 1 GB = 1,000,000,000 bytes. This is the standard used by ISPs and network equipment manufacturers.
To convert Kbps to MB/s: divide by 8,000. For example, 8,000 Kbps = 8 Mbps = 1 MB/s. The factor of 8 converts bits to bytes, and the factor of 1,000 converts kilobits to megabits. You can also use the Speed Converter tab above to convert any combination instantly.
At 100 Mbps (12.5 MB/s), a 1 GB file takes approximately 80 seconds. At 10 Mbps (1.25 MB/s), it takes about 800 seconds (~13 minutes). At 1 Mbps (0.125 MB/s), it takes roughly 8,000 seconds (~2.2 hours). Use the Download Time Estimator tab for any file size and speed combination.
No. All calculations happen entirely inside your browser using JavaScript. No data is transmitted over the network at any point. The tool works completely offline once the page has loaded.
Yes, completely free — no account, no sign-up, no usage limits, forever.
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