VPN Speed Test

VPN Speed Test – Measure Exactly What Your VPN Costs You

Every VPN slows you down a little. The honest question is how much — and that is what this vpn speed test is built to answer. Other guides tell you to run a speed test with your VPN off, write the numbers down, run it again with the VPN on, and compare. This tool does the whole job on one page: run the test in one state, switch your VPN, run it again, and you get a side-by-side table with your download and upload speed loss in percent and your ping change in milliseconds, calculated for you. It is part of Speed Test UK, and it works with any VPN provider — or none.

Below you will find why VPNs cost speed at all, how to run the comparison so the result is fair, what loss figures are normal for different protocols and server distances, what UK broadband users in particular should watch for, and the fixes that genuinely work — starting with server choice and split tunnelling — when your VPN takes too big a bite.

Why a VPN Slows Your Connection Down

A VPN does two things to every packet of data you send, and both cost time. First, it encrypts your traffic before it leaves your device and decrypts it at the VPN server. Modern encryption is fast, but on older laptops, phones and especially routers it still uses real processing power. Second, it reroutes your traffic: instead of heading straight to a website’s server, your data travels to the VPN server first — which might be in the same city or on another continent — and only then onwards. Extra distance means extra milliseconds on every single request, and if the VPN server is busy with thousands of other users, your share of its capacity shrinks further.

Three variables decide how big your slowdown is. Distance is the biggest: a VPN server in London adds very little to a UK connection, while one in Australia adds a quarter of a second of travel time before your data even starts its real journey. Protocol comes next: WireGuard (and providers’ own versions of it) is lean and modern, typically costing far less speed than the older, heavier OpenVPN, especially on slower hardware. Server load is the wildcard — the same provider can feel fast at breakfast and sluggish at 8pm when a popular server fills up. A proper vpn speed test separates these effects from your broadband itself, which is why the comparison, not any single number, is what matters.

How to Run This VPN Speed Test Properly

The tool stores each run in the page (nothing is saved or uploaded), so the only discipline required is keeping everything except the VPN the same between runs.

1. Pick your first state. Either is fine — most people start with the VPN off to get a clean baseline. Select “This run: VPN OFF” or “VPN ON” to match reality, not intention.
2. Close competing traffic. Pause downloads, cloud backups, game updates and streaming on other devices for a couple of minutes.
3. Run the test. It measures ping and jitter first, then download, then upload, taking around twenty seconds. Keep this tab on screen — browsers throttle background tabs and would corrupt the result.
4. Change only the VPN. Connect (or disconnect), staying in the same room, on the same device, on the same Wi-Fi. If you are testing a server, pick the one you would genuinely use day to day.
5. Run it again with the other option selected. The comparison table fills in automatically, with your speed loss and ping change worked out.
6. Repeat if the numbers look odd. One run can catch a passing busy moment. Two runs in each state, averaged by eye, give a figure you can trust.

A fairness warning: if you test the VPN-off run at 10am and the VPN-on run at 8pm, you are partly measuring your street’s peak-hour slowdown, not the VPN. Run both states back to back, minutes apart. If you want to sanity-check our numbers, the same manual method works on Ookla’s Speedtest, Netflix’s FAST.com and Cloudflare’s own speed test — those simply leave the comparing to you.

What Your Results Mean

The comparison table shows four rows. Download and upload differences appear as percentages: a negative figure is speed lost to the VPN, and that is what almost everyone sees. Ping and jitter are shown as a change in milliseconds, because for gaming and video calls, added delay matters more than lost megabits.

Ping deserves its own read. A UK-to-UK VPN typically adds 5–25 ms; connecting via the US commonly adds 70–120 ms; Australia or East Asia can add 250 ms or more. Downloads barely care, but a game or call feels every millisecond. Jitter — the variation between pings — is the quiet troublemaker: a VPN that adds a steady 20 ms is fine for calls, while one whose ping swings wildly will make voices break up even with plenty of download speed in reserve. If jitter is your problem, our ping tester digs into latency in more detail.

What Counts as a Normal Result?

On a UK connection to a UK or near-Europe server with a modern protocol, losing 5–15% of download speed is a good, realistic outcome, and you will not feel it in daily use. OpenVPN on the same route usually lands between 15% and 30%. Long-haul routes are a different world: 30–60% loss to distant servers is common and says more about physics than about your provider. Upload losses often run a few points higher than download losses, which matters if you send large files or stream your own video.

Context helps too. A 15% loss on a 900 Mbps full-fibre line still leaves you with roughly 765 Mbps — far more than a household needs. The same percentage on a 36 Mbps part-fibre line leaves about 31 Mbps, where two simultaneous 4K streams no longer fit. Judge your result against your actual line, not against someone else’s screenshot. If you do not know what your line delivers without a VPN, the VPN-off run in this test is exactly that figure — and our broadband speed test gives you a second opinion using the same careful method.

Testing on UK Broadband: What to Watch For

UK readers have a few local advantages and traps. The advantage: most major VPN providers run fast servers in London, and several in Manchester, so a genuinely near server exists for almost everyone — always test that one first before judging a provider on a US result. The traps are mostly about timing and hardware. UK home broadband slows noticeably between about 7pm and 10pm as whole streets stream at once, so peak-hour comparisons flatter nobody; test mid-morning or early afternoon for the cleanest read on the VPN itself. And if your VPN runs on your router rather than on your computer or phone, the router’s modest processor does all the encrypting — many ISP-supplied hubs and older routers cap VPN throughput far below line speed, which shows up in this test as a big, suspiciously round loss that no server change fixes. Testing the same VPN in its app on a laptop will confirm whether the router is the bottleneck.

One more UK point: your postcode decides your ceiling. On part-fibre (FTTC) lines the upload is often only 10–20 Mbps to begin with, so even a small VPN overhead is very visible in the upload row. On full fibre (FTTP), uploads are healthier and VPN losses look gentler. Neither is the VPN’s fault — the comparison table keeps you honest about which part of the result belongs to your line.

How to Make Your VPN Faster

Work through these in order. The first two fix the majority of bad results.

Choose a closer server

Distance is destiny. If your everyday VPN use does not require a particular country, connect to the nearest server — for most UK users that is a UK server, or Ireland, France, the Netherlands or Germany failing that. Reserve long-haul servers (US, Asia, Australia) for the times you actually need to appear there, and re-run this test on your chosen server so you know its real cost.

Switch the protocol to WireGuard

In your VPN app’s settings, look for the protocol option. WireGuard (or your provider’s equivalent — several brands give it their own name) is consistently faster than OpenVPN, particularly on phones, laptops and routers with modest processors. If you must use OpenVPN, its UDP mode is faster than TCP. Change one setting, re-run the comparison, and keep the better result.

Use split tunnelling for the things that do not need a VPN

Split tunnelling lets you route only chosen apps through the VPN while everything else uses your normal connection. It is the right answer when one app needs the VPN — a work system, say — but you want full speed for games, streaming boxes or large downloads. Most major apps offer it on Windows and Android. Two cautions: anything outside the tunnel is genuinely unprotected, so choose the split deliberately; and when you run this test, remember your browser is only “VPN on” if the browser itself is inside the tunnel.

Go wired, and test the device the VPN actually runs on

A weak Wi-Fi signal can masquerade as VPN slowness. If your loss looks terrible, plug a laptop into the router with an Ethernet cable and repeat the comparison — if the loss shrinks dramatically, your problem was wireless, not the VPN. Likewise, a VPN running on a five-year-old phone will post worse numbers than the same account on a new laptop; that is hardware, not the provider.

Avoid overloaded servers

Popular city servers fill up in the evening. Many apps show server load or let you pick a specific server within a city — choose a quieter one. If one click offers “fastest server”, use it, then verify with this test rather than trusting the label.

When the VPN Is Not the Problem

Sometimes the comparison comes back nearly clean — and the internet still feels slow. A small, consistent loss with everything else healthy usually means the issue lives elsewhere: your broadband package at peak times, your Wi-Fi, or a specific app. Check what address and provider your connection presents with our What Is My IP tool (it also confirms the VPN is actually connected to where you think it is), and run the DNS leak test and WebRTC leak test while you are here — a VPN that is fast but leaky is only doing half its job. If speeds are poor with the VPN firmly off and wired in, the fault sits with the line itself, and the evidence from a few days of logged tests is what your provider will need.

Frequently Asked Questions

How much speed should a VPN lose?

On a nearby server with a modern protocol such as WireGuard, expect roughly 5–15% download loss — effectively invisible in daily use. OpenVPN typically costs 15–30%. Distant servers can cost 40% or more, which is a reason to change server, not necessarily to change provider. Anything over about 40% on a UK or near-Europe server deserves the fix steps above.

Why is my VPN download fine but my upload terrible?

Upload is the thinner pipe on most UK home connections, so the same encryption overhead and server load show up bigger. It is also the first thing to suffer when a VPN server is crowded. Try another server in the same city, switch protocol, and check whether the slowdown exists on the VPN-off run too — if it does, the cause is your line, not the VPN.

Does this test work with any VPN?

Yes. The test measures your connection exactly as it is, in the browser, with no account and nothing to install, so it works with every provider, with free tiers, and with work VPNs — and with no VPN at all for the baseline run. Just make sure the state you select in the tool matches the state your device is actually in when the test runs.

Why do my results change every time I run the test?

Because the internet does. Your line, your Wi-Fi, your VPN server’s load and the wider network all vary minute to minute, especially in the evening. Small variations of a few percent are noise. Run each state twice, minutes apart, and trust the pattern rather than any single figure.

Is a free VPN always slower?

Usually, yes. Free tiers fund themselves somehow, and it is rarely through generous bandwidth: expect crowded servers, data caps and sometimes throttling by design. If your free VPN loses 40% or more while a paid provider’s trial loses 10% on the same line and server city, you have measured the difference rather than guessed at it.

Can I speed up a VPN on my router?

Only up to the router’s limits. Its processor encrypts every packet for the whole house, and modest hardware often caps out well below line speed. Switching the router’s VPN protocol to WireGuard helps most; beyond that, run the VPN on individual devices instead, or use a router with a faster processor. This test, run through a phone or laptop on the same network, will show you the difference immediately.

Get Your Number, Then Improve It

Scroll up and run the comparison now: baseline first, then with the VPN on, minutes apart. In under a minute you will know what your VPN really costs you — and if the answer is “too much”, the fixes above start with a closer server and a better protocol. Once your speeds are where they should be, a final pass through Speed Test UK‘s other checkers will confirm the whole connection, privacy included, is in proper shape.