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How long does it take to copy 1 TB over a Gigabit network? Time and speed breakdown

2h 13m is the number that turns an overnight backup into a 15-minute chore once you go 10 GbE. If you regularly move 1 TB+ over your LAN, 10 GbE has a real quality-of-life return on investment.

A 1 TB transfer over Gigabit Ethernet works out to 2 hours 13 minutes 20 seconds at peak. That's the figure most home NAS owners see when backing up a laptop or seeding a media library. It's also the inflection point where upgrading to 2.5 GbE or 10 GbE starts to have a daily-usability payoff.

By TechCompare · Updated

Transfer time
2h 13m 20s
At peak link speed
File size
1 TB
1000 GB
Link speed
1,000 Mbps
Gigabit Ethernet (1000 Mbps)

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Data Transfer Calculator

Estimated Transfer Time
2h 13m 20s

Speed Comparison

USB 2.0
4h 37m 46s
480 Mbps
USB 4 / Thunderbolt 4
3m 20s
40 Gbps
Gigabit Ethernet
2h 13m 20s
1 Gbps
Selected
10 Gigabit Ethernet
13m 20s
10 Gbps
WiFi 5 (ac)
5h 33m 20s
400 Mbps
WiFi 7 (be)
26m 40s
5 Gbps
SATA SSD
30m 18s
4.4 Gbps
NVMe Gen4 SSD
2m 22s
56 Gbps
This exact 1 TB copy over Gigabit Ethernet (1000 Mbps), pre-loaded. Change the file size, link, or model a longer round trip.
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How this is calculated

2.5 GbE brings this down to about 53 minutes; 10 GbE gets it to 13 minutes 20 seconds, identical to 100 GB over Gigabit. Cable costs are identical (Cat 6 handles all three), so the bottleneck is usually the switch and NIC combination. A consumer 10 GbE switch ports run $100-300 in 2026, which is finally low enough that the math starts working out for anyone routinely moving terabytes around.

Verdict

1 TB at Gigabit Ethernet's 1000 Mbps peak works out to 2 hours 13 minutes 20 seconds, the figure most home NAS owners see when backing up a laptop or seeding a media library, and the inflection point where the 2.5 GbE and 10 GbE upgrades from consumer networking tiers start to have a daily-usability payoff. At 2.5 GbE (2.5x throughput) the same 1 TB drops to roughly 53 minutes, and at 10 GbE (10x throughput) it drops to about 13 minutes 20 seconds, which is where the upgrade math crosses from 'nice to have' into 'quality-of-life ROI' once your weekly workflow involves 1 TB-plus transfers.

More Ethernet scenarios

100 GB over USB 3.0
A 100 GB transfer over USB 3.0 works out to exactly 2 minutes 40 seconds at the interface's 5 Gbps peak rate.
View details ➜
1 TB over USB 3.0
A 1 TB transfer over USB 3.0 works out to 26 minutes 40 seconds at the interface's 5 Gbps peak data rate.
View details ➜
4 GB over USB 2.0
A 4 GB transfer over USB 2.0 works out to 1 minute 6 seconds at the interface's 480 Mbps peak rate.
View details ➜

Related guides

Cat6 vs Cat6a ethernet cable
The ethernet cable comparison that determines 1 TB transfer rates.
View guide ➜
RAID 5 vs RAID 6 parity storage
The storage array layout that gates 1 TB network throughput.
View guide ➜

Frequently asked questions

Is upgrading to 10G Ethernet worth it for moving 1 TB?
Yes, it reduces the transfer time from over 2 hours on Gigabit down to just 13 minutes, provided your storage drives can write that fast.
Is upgrading to 2.5 GbE worth it for a 1 TB transfer?
Yes if you do this weekly or more often. A 1 TB transfer takes 2 hours 13 minutes over Gigabit, 53 minutes over 2.5 GbE, and 13 minutes over 10 GbE. 2.5 GbE cards and switches are cheap in 2026 ($30-50 for a card, $100 for an 8-port switch) and use the same Cat6 cable as Gigabit, so the upgrade pays for itself in time saved.
What hardware do I need to upgrade a Gigabit home NAS to 10 GbE?
A 10 GbE NIC for the NAS (or an M.2 to SFP+ adapter), a 10 GbE NIC for the workstation (about $50-100), Cat6a or Cat7 cable rated to 500 MHz, and either a 10 GbE switch or a direct-attached copper SFP+ link. The total upgrade typically runs $200-400 if your NAS hardware already supports the card.

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