Download Time Calculator
Estimate download time from file size and connection speed. Supports KB, MB, GB, TB and Kbps, Mbps, Gbps.
Frequently Asked Questions
Why is download time often longer than expected?
ISP speeds are advertised in megabits per second (Mbps), but file sizes are typically in megabytes (MB). Since 1 byte = 8 bits, a 100 Mbps connection transfers only 12.5 MB/s. Overhead from protocols, network congestion, and Wi-Fi interference further reduce real-world speeds.
What is the difference between Mbps and MB/s?
Mbps (megabits per second) is a measure of network speed. MB/s (megabytes per second) is a measure of data transfer. To convert: MB/s = Mbps ÷ 8. So a 100 Mbps plan gives you about 12.5 MB/s of actual throughput.
How can I speed up downloads?
Connect via Ethernet instead of Wi-Fi, close other bandwidth-heavy apps, download during off-peak hours, use a download manager for large files, and ensure your router firmware is up to date.