Altitude Meter
A free altitude / elevation meter. See your height above sea level, looked up from your GPS position against a terrain elevation map rather than your phone's unreliable built-in altitude reading.
Uses your phone's GPS position (not its unreliable built-in altitude sensor) to look up the ground elevation at your exact spot from a terrain map. Your coordinates are sent only to fetch that one number — nothing is stored.
Find your elevation in 2 steps
Allow location access when your browser asks — this only happens once and your coordinates are used only to fetch one elevation figure.
See your height above sea level in metres or feet, along with the accuracy and data resolution behind the number.
Where an altitude meter helps
Check the elevation of a trailhead, campsite or viewpoint before or during a trek.
Curious how high above sea level your home, office or a hill station actually is.
Get a quick ground-elevation reference for a launch point.
See exactly how high up you are, wherever you happen to be.
Benefits
- Uses a terrain elevation map (SRTM), not your phone's built-in altitude sensor — which is frequently missing or off by tens of metres.
- Shows exactly how reliable the number is: your GPS position accuracy and the terrain data's resolution, both stated plainly.
- Also shows your device's raw GPS altitude alongside it, purely for comparison.
- Free, quick, and only sends your coordinates to fetch one elevation value — nothing is stored.
More free utilities
Frequently asked questions
Why not just use my phone's built-in altitude?
Phones estimate altitude from GPS satellite signals, which is a far less precise measurement than horizontal position — readings are commonly off by 10–50 metres, and many phones and browsers don't report an altitude at all. This tool instead takes your accurate GPS position and looks up the actual ground elevation at that point from a terrain map, which is far more reliable.
What do “accuracy” and “resolution” mean here?
Accuracy is how precise your phone's GPS position fix is right now, in metres — a smaller number means your location is better pinned down. Resolution is the grid spacing of the terrain elevation dataset (about 30 m), meaning the elevation value represents the average ground height over roughly that size of area, not one exact pinpoint.
How accurate is the elevation figure?
It's generally accurate to within a few metres to a few tens of metres, depending on your GPS accuracy and how flat or steep the terrain is at your exact spot. It's a strong estimate for hiking, curiosity or general reference — not a survey-grade measurement.
Does it work indoors?
It needs a GPS fix, so it works best outdoors with a clear view of the sky. Indoors, your position accuracy (and therefore the elevation estimate) will usually be worse or unavailable.
Is my location uploaded or stored?
Your coordinates are sent once to fetch the elevation figure for that spot and are not logged or stored. Nothing about your location is saved on our end.
Does this work anywhere in the world?
Yes — the terrain dataset behind it has near-global coverage. Very remote areas or some small islands may occasionally return no data.
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