How to Calculate Data Transfer Time
Data transfer time depends on the file size, available bandwidth, and protocol efficiency.
Time (seconds) = File Size (bits) / (Speed (bps) x Efficiency)
Note that internet speeds are typically measured in bits per second (Mbps), while file sizes are in bytes. There are 8 bits per byte. Real-world speeds are lower than theoretical maximums due to protocol overhead, congestion, and latency.