TechFuel HQEnter how much data you’re moving, the connection, and the drives at each end. The calculator gives you the realistic transfer time, not the marketing one. Here’s the logic behind it.
Effective speed is the slower of the link and the disk, minus overhead. A transfer can only go as fast as its slowest part. If your 10GbE link can carry 1,250 MB/s but the source is a single hard drive that reads at 180 MB/s, you move data at 180 MB/s. The tool takes the lower of the two, then trims it by a real-world efficiency factor for protocol overhead.
The bottleneck readout is the useful part. It tells you whether spending money on faster networking would actually help. If the drive is the limit, a 10GbE card changes nothing until you add disks or switch to SSDs. If the link is the limit, faster networking pays off directly.
Time is just size divided by speed. Once the effective speed is set, the math is exact: a 1 TB file at 280 MB/s takes about an hour. The per-link table shows the same transfer across every common Ethernet speed so you can see where the gains flatten out for your storage.
Sizes use decimal units (1 TB = 1,000 GB) to match how both drives and network speeds are quoted.