Why is my GPS accuracy 50 meters or worse?

The usual causes, in order: you are indoors, so the device is estimating position from Wi-Fi networks rather than satellites; you are on a desktop or laptop, most of which have no GPS chip at all and rely on Wi-Fi or IP address, which can be off by hundreds of meters to kilometers; the GPS is still warming up, since a cold start can take 30 seconds or more to lock enough satellites; or the sky is blocked by tall buildings, dense trees, or a metal roof. The number improves on its own once you are outside with clear sky and give it a minute.

How can I improve GPS accuracy?

Go outside with the widest view of sky you can get and wait 30 to 60 seconds for the receiver to lock more satellites. Keep the phone unobstructed, on a dashboard or in your hand rather than in a pocket or a metal mount. On iPhone, make sure Precise Location is on for your browser under Settings, Privacy and Security, Location Services. Keep Wi-Fi enabled even if not connected, because scanning nearby networks helps the first fix. And avoid cases with metal plates, which can weaken the antenna.

Does Wi-Fi improve location accuracy?

Indoors, dramatically: with no satellite view, a database of known Wi-Fi networks is often the only thing producing a usable position, and in dense cities it can be accurate to tens of meters. Outdoors it mainly helps the first fix happen faster. The counterintuitive part is that leaving Wi-Fi on improves location even when you are not connected to any network, because the device only needs to see the networks, not join them.

What does the accuracy number actually mean?

It is a radius estimate, not a guarantee: the device is roughly 68 percent confident your true position is within that many meters of the reported point. So an accuracy of 6 meters means you are probably within a 6 meter circle, but about one reading in three falls outside it. That is also why the number jumps around: it is recalculated with every fix as satellites come and go.

How do I check if my GPS is working?

Run the test above outdoors and read two things. If the accuracy lands in single digits or low tens of meters and updates arrive about once a second, the GPS receiver is working. If the accuracy sits in the hundreds of meters and never improves outside with clear sky, the fix is coming from Wi-Fi rather than satellites, which on a phone points to a disabled or failing receiver, a case blocking the antenna, or Precise Location being off for the browser. Speed available: Yes is the strongest confirmation, because Doppler speed only exists when actual satellite signals are being tracked.

What is a GPS signal test?

A GPS signal test checks how well your device is receiving satellite signals right now, and this page is one: the accuracy radius is the practical summary of signal quality, since more satellites and cleaner signals shrink it. A browser cannot list individual satellites or their signal-to-noise ratios — that needs a native app with raw GNSS access — but for the question people actually have, is my GPS healthy and precise enough, the accuracy figure, the update rate and the presence of Doppler speed answer it.

How often does phone GPS update?

About once per second on phones — the GPS updates figure this page shows is your own device measured live. One hertz is the standard fix rate consumer GNSS chips deliver to the operating system, and the browser passes each fix straight through. Some chips can run at 5 or 10 Hz for sports devices, but phone operating systems do not expose that through the browser. If you see well under one update per second, the receiver is struggling for signal and holding fixes until quality recovers.

Why does my laptop show accuracy of 1000 meters or more?

Almost no laptop has a GPS chip. The browser falls back to Wi-Fi positioning, and if that fails, to your IP address, which locates your internet provider rather than you. Kilometre-scale accuracy on a desktop is normal and no amount of waiting fixes it. For a real satellite reading, run the same test on a phone.

Tools · GPS accuracy test

GPS accuracy test: how good is your fix?

Your device reports an accuracy radius with every position fix. This reads it live, rates it, and shows everything else the GPS is telling your browser. Nothing is uploaded.

See your GPS accuracy

Tap the button, then choose Allow. Your location stays on this device — nothing is uploaded.

What the accuracy number actually means

The figure is an estimate the positioning system attaches to every fix: a radius, in meters, within which it is roughly 68 percent confident your true position lies. An accuracy of ±6 m does not mean you are exactly there; it means you are probably inside a 6-meter circle, and about one reading in three lands outside it. The number is recalculated with every fix, which is why it moves around as satellites rise, set, and get blocked.

It also silently tells you which system produced the fix. Single meters mean satellites. Tens of meters usually mean satellites with a poor sky view. Hundreds of meters or more mean the position came from Wi-Fi or cell towers, not GPS at all.

What is a good GPS accuracy?

Reading	Rating	Typical situation
under 5 m	Excellent	Modern phone, open sky, GPS warmed up
5–15 m	Good	Suburbs, light tree cover, phone on a dashboard
15–50 m	Fair	City streets between tall buildings, deep cabin placement
50–500 m	Poor	Indoors near windows, Wi-Fi positioning doing the work
500 m +	Not GPS	Deep indoors, or a laptop with no GPS chip

For speed measurement the bar is lower than people expect: speed comes from the Doppler shift of the satellite signals rather than from subtracting positions, so a phone showing ±10 m of position accuracy can still report speed within about 0.5–2 mph. We cover that split in how accurate phone GPS speed really is.

If you need the position itself rather than a signal-quality test, use the GPS coordinates finder to view and copy latitude and longitude in DD, DMS, and DDM formats.

Why is my GPS accuracy 50 meters?

In rough order of likelihood: you are indoors, so the fix is coming from a database of nearby Wi-Fi networks rather than satellites; the receiver is still on a cold start, which can take 30–60 seconds to lock enough satellites; or the sky is simply blocked — street canyons, dense trees, a metal roof, even a phone mounted low in the footwell. None of these are faults. Give it a minute outside and watch the number on this page fall.

Why does a laptop show 1000 m or worse?

Almost no laptop contains a GPS chip. The browser falls back to Wi-Fi positioning and then to your IP address, which locates your internet provider, not you. Kilometre-scale accuracy on a desktop is expected, and waiting will not improve it. Run this page on a phone for a satellite reading — the difference between the two devices is itself a neat demonstration of what GPS actually does.

Is my GPS working at all? (the signal test)

The same readout doubles as a signal test. A healthy receiver outdoors settles into single digits or low tens of meters with roughly one update per second, and Speed available: Yes — Doppler speed only exists while real satellite signals are tracked. A receiver that never gets below hundreds of meters under open sky is not seeing satellites: on a phone that points to Precise Location being off, a case or mount shadowing the antenna, or a hardware fault. A browser cannot show per-satellite signal strength — that needs a native GNSS app — but it answers the question people actually bring to a signal test: is this thing working, and how well.

How to improve your accuracy

Open sky beats everything. Step away from buildings; the widest horizon wins.
Wait out the warm-up. The first fix is the worst fix; 30–60 seconds of lock time typically halves the radius.
Keep the phone exposed. Dashboard or hand, not pocket, bag, or a metal mount that shadows the antenna.
Check Precise Location (iPhone): Settings → Privacy & Security → Location Services → your browser → Precise Location on. With it off, apps get a deliberately coarse position.
Leave Wi-Fi on. Scanning networks speeds up the first fix even when you never connect — the device only needs to see them.

Reading the rest of the panel

GPS updates is how often the browser hands over a new fix; phones typically settle near one per second. Speed available shows whether the fix carries a Doppler speed — the value our live speedometer reads; desktops usually report none. Altitude arrives with its own, larger error band, since satellite geometry constrains height less than latitude and longitude. Heading only appears while you are moving, because it is derived from your track rather than a compass.

If your accuracy looks good but distance still drifts while parked, that is a different phenomenon — position scatter inside the accuracy circle — and it is why the GPS odometer filters out readings below walking pace before counting them.

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