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Transferring 50 GB over WiFi 5 takes 16m 40s

A 50 GB transfer over WiFi 5 works out to 16 minutes 40 seconds at a realistic 400 Mbps sustained rate on a good 5 GHz 80 MHz link. 802.11ac's marketing number of 1.3 Gbps assumes perfect conditions — in a typical home with walls, interference, and a few metres of distance, 400–500 Mbps is what you actually get.

Transfer time
16m 40s
At peak link speed
File size
50 GB
50 GB
Link speed
400 Mbps
WiFi 5 (real-world 400 Mbps)

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Data Transfer Calculator

Configuration

Mbps
Estimated Transfer Time
16m 40s

Speed Comparison

USB 2.0
13m 53s
480 Mbps
USB 4 / Thunderbolt 4
10s
40 Gbps
Gigabit Ethernet
6m 40s
1 Gbps
10 Gigabit Ethernet
40s
10 Gbps
WiFi 5 (ac)
16m 40s
400 Mbps
WiFi 7 (be)
1m 20s
5 Gbps
SATA SSD
1m 30s
4.4 Gbps
NVMe Gen4 SSD
7s
56 Gbps

How this is calculated

Close to the router on a clean channel, WiFi 5 can push 600–800 Mbps briefly. Through a wall or at range, 200 Mbps is more realistic, doubling the transfer time to ~34 minutes. That's why large transfers over WiFi feel inconsistent — the link rate changes moment to moment. If consistency matters, wired Gigabit at ~110 MB/s sustained is a cleaner choice for large transfers even in a WiFi-first home.

Verdict

16m 40s is a reasonable WiFi 5 estimate at good signal. In practice, vary it by 1.5–2× depending on range and congestion. For a predictable transfer time, plug in.

More Wireless scenarios

100 GB over WiFi 6
WiFi 6 (real-world 1.2 Gbps)
View details ➜
200 GB over WiFi 7
WiFi 7 (real-world 5 Gbps)
View details ➜

Frequently asked questions

How long does it take to transfer 1 TB over Gigabit Ethernet?
At a theoretical 1000 Mbps (125 MB/s), 1 TB takes about 2 hours and 13 minutes in ideal conditions. Real-world speeds over Gigabit Ethernet typically top out around 110-115 MB/s due to TCP overhead, so budget closer to 2.5 hours for a full 1 TB copy.
Why is my real transfer speed slower than the cable's rated speed?
Rated speeds are raw signalling rates in bits per second. Protocol overhead (TCP/IP, USB framing, filesystem operations), encryption, small-file latency, and the slowest device in the chain (often the disk, not the cable) all reduce usable throughput. A USB 3.0 port rated 5 Gbps usually delivers around 400 MB/s in practice, not the theoretical 625 MB/s.
What's the difference between megabits (Mbps) and megabytes (MB/s)?
There are 8 bits in a byte, so 1000 Mbps equals 125 MB/s. Network speeds and ISP plans are advertised in megabits per second, while file sizes and storage speeds are measured in megabytes per second. Dividing Mbps by 8 gives you the MB/s figure you actually see when copying files.
How fast is WiFi 6 compared to Gigabit Ethernet for file transfers?
WiFi 6 can exceed Gigabit Ethernet on paper (up to ~9.6 Gbps theoretical) but real-world throughput usually lands between 500 Mbps and 1.5 Gbps depending on distance, interference, and client hardware. For a single large file transfer, wired Gigabit is still more consistent; WiFi 6E or WiFi 7 can edge ahead in ideal conditions.
Is USB 4 or Thunderbolt 4 faster for copying files?
Both use the same 40 Gbps underlying spec and deliver comparable real-world speeds of around 2800-3200 MB/s for sustained transfers. Thunderbolt 4 guarantees the full 40 Gbps and PCIe 32 Gbps tunnel; USB 4 allows 20 Gbps implementations, so check the port's actual spec rather than assuming parity.
Does file size affect transfer speed?
Yes — significantly. Transferring one 50 GB file hits near-maximum throughput, but copying 50 GB of small files (thousands of photos, say) can be 5-10x slower because every file has filesystem and metadata overhead. For large migrations, compressing into an archive first is often faster end to end.

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