Free Tool · Draw on a satellite map

Area calculator: measure land area on a map in acres and m²

Measure the area of any field, plot, garden, roof, car park or property by clicking its corners on a map or satellite image. Get the size in acres, hectares, square metres, square feet, square yards and square miles, plus the perimeter. Works anywhere in the world; free, no signup.

Measure an area on the map

Click the map at each corner of the area, in order.

Zoom in close and switch to Satellite to trace a field, garden, roof or plot. The shape closes back to the first corner on its own.

Add at least three corners to see the area.

Worked out on your device on the curved Earth, so large areas are measured correctly too. The result is as precise as your clicks: zoomed in on satellite imagery, a field is usually within 1 to 2% of a surveyed figure. For legal boundaries, use the title plan or a surveyor.

How to measure an area on the map

  • Find the place: search an address or use your location, then zoom in.
  • Switch to Satellite with the button on the map to see fences, hedges and roof edges.
  • Click each corner in order around the edge. For a curved edge, click several points along it.
  • Read the area in every unit, and copy the result or the corner coordinates to share.

Area units and conversions

UnitIn square metresIn acresGood for
1 square foot0.0929 m²0.000023Rooms and houses (US, UK)
1 square metre1 m²0.000247Rooms, flats, gardens
1 acre4,046.86 m²1Land and farms (US, UK)
1 hectare10,000 m²2.471Land and farms (Europe, Australia)
1 square kilometre1,000,000 m²247.1Towns, lakes, parks
1 square mile2,589,988 m²640Large estates, counties

For comparison, a football pitch is about 0.7 hectares (1.75 acres), and a tennis court is about 260 m².

Frequently asked questions

How do I measure the area of my land?

Search your address, zoom in close and switch to Satellite. Then click each corner of the land in order around the edge. The area appears as soon as there are three corners, in acres, hectares, square metres, square feet and more, with the perimeter.

How many square feet are in an acre?

One acre is 43,560 square feet, or 4,046.86 square metres, about 90% of an American football field between the end zones. A hectare is 10,000 square metres, or about 2.47 acres.

How accurate is the area?

The calculation itself is exact on the curved Earth; the result depends on how closely your clicks follow the real boundary. Zoomed in on satellite imagery, a field is usually within 1 to 2% of its surveyed size. Satellite images can be slightly offset, and trees can hide a boundary.

Can I measure a curved boundary?

Yes. Add more corners along the curve: the more points you click, the closer the shape follows it. Undo removes the last point if a click lands in the wrong place.

Can I use this for a planning application or a sale?

Use it to estimate. For legal purposes, the boundary on the land registry title plan or a measured survey is what counts.

Related tools

Distance Calculator

Distance between two points

Radius Map

Draw a circle of any radius

Satellite View

Satellite imagery of any address

Elevation Finder

Height and slope of the land