Measure area on a map
Trace any shape – a paddock, a property, a park or a whole district – and read its area and perimeter instantly in acres, hectares, square metres, km² or square miles.
How to calculate area on a map
- Zoom to the place you want to measure. Search for an address or landmark, then switch to the satellite basemap so you can see fences, roofs and field edges clearly.
- Click around the edge. With the area tool active, click each corner of the shape. A live outline follows your cursor.
- Close the shape. Click the first point again or double-click. The area and perimeter appear in the panel.
- Pick your unit. Square metres, hectares, acres, square kilometres, square miles or square feet – switch freely.
- Refine. Drag any vertex to adjust it, or click the midpoint of an edge to add a new vertex.
- Keep it. Save the shape as a polygon with a name, colour and label, then share or embed the map.
Shapes you can measure
- Polygons – any outline with as many corners as you need.
- Rectangles – drag a box for quick building, lot or site footprints.
- Circles – the area of a radius, for coverage zones.
- Freehand – draw with your finger or mouse for irregular natural features.
- Built-in boundaries – add a layer such as parks & gardens, lakes, national parks or districts and click any shape to read its area – no tracing required.
Area units at a glance
| Unit | Equals | Typical use |
|---|---|---|
| 1 hectare (ha) | 10,000 m² · 2.471 acres | Farms, parks, development sites |
| 1 acre | 4,046.86 m² · 0.405 ha | Land and property in the US, UK and Australia |
| 1 km² | 100 ha · 247.1 acres | Suburbs, lakes, regions |
| 1 square mile | 2.59 km² · 640 acres | Counties, large ranches |
Who uses an area calculator
- Farmers and graziers sizing paddocks for seed, fertiliser or stocking rates.
- Home owners estimating a lawn, roof, driveway or solar panel area.
- Real estate agents and buyers checking land size against a listing.
- Landscapers, fencers and contractors quoting a job.
- Planners, ecologists and students comparing parks, habitats or zones.
Open the area calculator full screen
Related
Frequently asked questions
How do I measure acres on a map?
Select the area tool, click around the edge of the land, close the shape and choose acres. The panel shows the area and the perimeter.
Can I measure more than one shape?
Yes. Draw as many shapes as you like; each keeps its own area, and the layer panel lists every shape's area.
Is the area calculator free?
Yes – drawing, measuring, saving and sharing are all free. Exporting shapes to files such as KML or Shapefile is unlocked with any data layer purchase.
Does it show the perimeter too?
Yes. Perimeter is shown alongside area, in metres, kilometres, feet or miles – handy for fencing.
What about a pond or building inside a field?
Measure the field, then measure the pond as a second shape and subtract one figure from the other. Both areas are shown in the layer panel.
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