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Data Transfer Time Calculator
NetworkingHow long to move X GB over a Y Mbps link? Get the ideal time and a realistic estimate with overhead.
Ideal transfer time
1h 6m
at the full line rate
Realistic (~80%)
1h 23m
allowing for protocol overhead & congestion
Remember the bits-vs-bytes gap: a 100 Mbps link moves ~12.5 MB/s at best. Real-world TCP throughput is typically 70–90% of line rate.