LAN vs WiFi File Transfer Speed — What to Actually Expect in 2026
Wired LAN and WiFi are not the same for file transfers. Here are real-world speed expectations for both, why WiFi is inconsistent, and when it is good enough.
Wired LAN is both faster and far more consistent than Wi-Fi for file transfers. Expect ~90–115 MB/s on wired gigabit versus roughly 25–80 MB/s on Wi-Fi depending on standard, distance and congestion — and Wi-Fi's real problem is variance, not just its ceiling. Wi-Fi is fine for small files and light use; for large, time-sensitive transfers, a cable wins every time.
The Short Answer Most Guides Get Wrong
Most articles comparing LAN and WiFi speeds focus on theoretical maximums: "Gigabit Ethernet is 1,000 Mbps, WiFi 6 is 9.6 Gbps." These numbers are technically accurate and practically useless.
In real office conditions, the gap is less dramatic but still significant. More importantly, the variability of WiFi is the issue — not just its average speed. A file transfer that takes 3 minutes on average but sometimes takes 20 minutes because of interference or network congestion is not a reliable workflow tool.
This article covers what to actually expect.
Real-World Wired LAN Speeds
Wired Ethernet performance is consistent and predictable because it is a point-to-point dedicated connection.
| Ethernet standard | Theoretical max | Real sustained throughput |
|---|---|---|
| Fast Ethernet (100BASE-T) | 100 Mbps | 90–95 Mbps (~11 MB/s) |
| Gigabit Ethernet (1000BASE-T) | 1,000 Mbps | 900–950 Mbps (~110 MB/s) |
| 2.5 Gigabit (2.5GBASE-T) | 2,500 Mbps | ~2,300 Mbps (~270 MB/s) |
| 10 Gigabit (10GBASE-T) | 10,000 Mbps | ~9,000 Mbps (~1,050 MB/s) |
Most offices built or renovated in the last 15 years have gigabit switches and Cat5e or Cat6 cabling, delivering consistent ~110 MB/s. The sustained throughput is typically 92–95% of theoretical maximum.
Check whether your office is wired for gigabit: Right-click the network icon in the Windows taskbar → Open Network and Internet Settings → Status → look for "1 Gbps" next to your Ethernet connection. If it says "100 Mbps," your switch, cable, or adapter is the bottleneck.
Real-World WiFi Speeds
WiFi performance is variable by nature. Multiple devices share the same radio spectrum, physical interference affects signal quality, and distance from the access point degrades throughput.
| WiFi standard | Theoretical max | Real sustained (close to AP) | Real sustained (typical office) |
|---|---|---|---|
| WiFi 4 (802.11n) | 300–600 Mbps | 80–120 Mbps (~12 MB/s) | 30–60 Mbps (~5 MB/s) |
| WiFi 5 (802.11ac) | 1,300–3,500 Mbps | 200–400 Mbps (~35 MB/s) | 100–200 Mbps (~18 MB/s) |
| WiFi 6 (802.11ax) | 9,600 Mbps | 400–800 Mbps (~70 MB/s) | 200–400 Mbps (~40 MB/s) |
| WiFi 6E (6 GHz band) | 9,600 Mbps | 600–1,200 Mbps (~100 MB/s) | less deployed, varies |
The "typical office" column reflects real conditions: multiple devices competing for band, some offices with older access points, concrete walls between floors, and heavy concurrent WiFi traffic.
Why WiFi Slows Down in Offices Specifically
Channel contention: WiFi is a shared medium. All devices on the same channel at the same access point take turns. When 15 devices are active simultaneously, each gets a smaller time slice. During a large file transfer, other users' video calls, browser traffic, and email sync all compete for the same channel.
Interference from neighboring offices: In office buildings, you often share 2.4GHz or 5GHz spectrum with 10–30 other networks. A busy 2.4GHz channel (1, 6, or 11) can cut effective throughput by 40–60%.
Signal degradation: At 10 meters through two walls, a WiFi 5 connection that showed 400 Mbps in the same room may show 60–80 Mbps.
Access point load: Enterprise access points handle it well. Consumer-grade access points deployed in SOHO configurations degrade under sustained high-throughput load.
File Transfer Time Comparison
| File size | Wired Gigabit | WiFi 5 (good conditions) | WiFi 5 (average office) |
|---|---|---|---|
| 1 GB | ~9 seconds | ~28 seconds | ~50 seconds |
| 10 GB | ~1.5 minutes | ~4.5 minutes | ~8 minutes |
| 50 GB | ~7.5 minutes | ~22 minutes | ~42 minutes |
| 200 GB | ~30 minutes | ~90 minutes | ~2.7 hours |
For daily large file transfers — video exports, RAW photo batches, CAD projects, Revit models — the difference between wired and WiFi is significant at scale.
When WiFi Is Good Enough
WiFi is appropriate for file transfers when:
- Files are under 1GB and transfers happen occasionally
- The workflow is document-centric (PDFs, spreadsheets, Word files)
- The machine is a laptop or mobile device without a convenient wired connection
- Both machines are close to the access point and on the same WiFi 5 or WiFi 6 network
For these cases, WiFi 5 or WiFi 6 at good signal strength delivers 100–300 Mbps — more than sufficient for the file sizes involved.
Mac and Windows WiFi File Transfer Comparison
Both Mac and Windows laptops support the same WiFi standards and achieve similar real-world throughputs on the same network. The OS does not materially affect WiFi speed for file transfers.
Mac-specific note: AirDrop creates a direct WiFi peer-to-peer connection bypassing the access point, achieving 30–80 MB/s between Apple devices. This is faster than going through a congested access point but slower than a wired connection. AirDrop is Mac and iPhone/iPad only.
Windows-specific note: Windows sometimes limits network adapter power state to save battery on laptops. If WiFi transfers feel slower on a laptop than a desktop: Device Manager → Network Adapters → [WiFi adapter] → Properties → Power Management → uncheck "Allow the computer to turn off this device to save power."
Practical Recommendations
For fixed desktop workstations: Always use wired gigabit. There is no performance reason to use WiFi for desktop machines.
For laptops that dock at a desk: Docking stations with a wired Ethernet port provide wired speeds without cable management hassle.
For laptops used freely around the office: WiFi is the practical option. Position access points to provide consistent coverage throughout the space, and use WiFi 6 hardware where possible.
For dedicated file transfer between two fixed machines: Wired gigabit, always. The consistency matters as much as the speed.
For application-level tools that handle local file transfer: Oxolan (Windows, macOS) and LocalSend (Windows, Mac, Linux) both operate at the speed your network delivers — they do not add meaningful overhead on top of the underlying connection.
Frequently asked questions
Is wired LAN faster than Wi-Fi for file transfers?
Yes, and more importantly it is steadier. Wired gigabit sustains ~90–115 MB/s; Wi-Fi ranges from about 25 MB/s on a congested office network to 80 MB/s in ideal conditions, and it fluctuates as people, walls and other traffic come and go. For a predictable large transfer, wired always wins.
Why is my office Wi-Fi so slow for large files?
Wi-Fi is a shared medium — every device on an access point takes turns, so one big transfer competes with everyone else, and distance, walls and interference cut the rate further. A wired connection gives each machine its own dedicated path, which is why the same file moves faster and more reliably over Ethernet.
Is Wi-Fi good enough for office file sharing?
For documents, small files and occasional transfers, yes. For large media, backups or moving many gigabytes on a deadline, Wi-Fi's inconsistency becomes the problem. A LAN transfer app like Oxolan will use whatever connection a machine has, but you get its full 60–115 MB/s range only on wired gigabit.
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