GPS Area Calculator
Marea is a GPS area calculator that turns your phone into a precision land-measuring tool. Use GPS, satellite imagery and high-resolution maps to measure any area, distance or perimeter — no professional equipment required.
How Marea’s GPS Area Calculator Works
- Open the map — Marea uses your phone’s GPS to locate you on a satellite or street map.
- Walk or tap — Place pins by walking the boundary with GPS, or tap the map to drop pins around an area you can see from above.
- Read your area instantly — Marea calculates area, distance and perimeter as you go and displays results in your preferred units.
You don’t need to be a surveyor and you don’t need expensive GPS hardware. Marea gives you a working GPS area calculator app that anyone can use in seconds.
GPS Measurement Modes
Tap-on-Map Mode
Use satellite imagery to identify boundaries and tap to drop precise pins around them. Ideal for measuring fields, lots and roofs you can see clearly from above.
Walk-and-Measure Mode
Walk the boundary of your land while Marea tracks your GPS position. Best for areas obscured by trees, irregular boundaries or anywhere satellite imagery isn’t precise enough.
Hybrid Mode
Start with satellite pins and refine with GPS as you walk — combining the best of both methods for maximum accuracy.
GPS Accuracy
Modern smartphones use multi-constellation GNSS (GPS, GLONASS, Galileo, BeiDou) and typically deliver 3–5 metre accuracy outdoors with a clear view of the sky. For most agricultural, real estate and construction use cases, that’s more than enough.
For higher precision, Marea also lets you fine-tune pins manually using satellite imagery — you can pull pins to the exact corner of a building, fence or property line you can see.
What Can You Measure?
A GPS area calculator app is useful in any field where you need quick, reliable land measurements without dedicated survey equipment.
- Farm fields — Calculate acreage for crop planning, subsidies and yield analysis
- Property lots — Verify lot sizes before buying, selling or listing
- Construction sites — Estimate site area for quotes, permits and material orders
- Solar installations — Measure rooftop or land area for solar panel coverage
- Forestry & conservation — Map managed land parcels and conservation zones
- Sports & event venues — Lay out fields, courses and event grounds
- Surveying recon — Get fast estimates during initial site visits before formal survey work
Supported Units
| Area | Distance |
|---|---|
| Square metres (m²) | Metres (m) |
| Square feet (ft²) | Feet (ft) |
| Acres | Kilometres (km) |
| Hectares (ha) | Miles (mi) |
| Square kilometres (km²) | Nautical miles (nmi) |
| Square miles (mi²) |
Switch between units instantly. No spreadsheet, no manual conversion.
Why Use Marea Instead of a Dedicated GPS Device?
- You already carry the hardware — Modern phones have GNSS chips that rival entry-level survey GPS
- Free to try — Download and start measuring in seconds
- Visual confirmation — See your measurement on a satellite map as you work
- Save & export — Keep a library of measurements and export as KML for Google Earth or other tools
- Works offline — Once map tiles are loaded, GPS measurement continues without a connection
Related Tools
- Land measurement app — full breakdown of supported land units
- Area calculator — overview of Marea’s area calculator
- Acreage calculator — measure farms and plots in acres
- GPS land measurement — using GPS to measure land
- Distance measurement — measure point-to-point distances
Try Marea Today
Download Marea on iOS or Android and start measuring in seconds.
