Operations

Transfer Time Estimator

Planning a backup window, dataset migration or office-to-datacenter copy? Get the wall-clock before you start.

Common lines: 100 Mbps (fast broadband) · 1000 Mbps (1 GbE) · 10000 Mbps (10 GbE)

1.00 TB at 1000 Mbps takes

2h 26m 36s

≈ 8796 seconds · 1,099,511,627,776 bytes · 0.12 GB/s practical throughput at 100% line rate

× 0.8 efficiency
Real transfers reach ~80% of line rate — multiply hours by 1.25.

× 0.7 with overhead
Filesystem + network overhead on small files can exceed 30%.

× 1 for storage
Use binary units consistently: 1 TB ≙ 1024 GiB ≈ 4.4 × 10¹² bits.