Area Calculator

This planimeter tool can be used to measure the enclosed area of a defined polyline on a map.

Measure an Area

Search For Location :


Area Output

0 m²
0 km²
0 Acres
0 Hectares
0 Feet²

Perimeter Output

0 m
0 km


 Delete Last Point 

 Delete All Points 

 Start a New Area 

Show Markers?
Transparent Fill Colour?
[Map Height : Small - Medium - Large - Full Screen]

Read KML (Beta)

Upload KML File:



To use the area calculator tool:

  • Zoom and pan the map to find the area of interest
  • Click on the map to place a vertices for the polyline
  • Click as many time as necessary to define the polyline

The area enclosed will them be output in square meters and square kilometers

You can click the [Delete Last Point] button if you make a mistake or click [Clear All] points to remove all points from the map and start again.

You can also reposition the markers after they have been placed on the map by dragging and dropping them.


The area calculator tool allows you to find out the area that is enclosed inside a closed polyline overlaid on a map.


Lough Neagh

A measurement of Lough Neagh in Northern Ireland. Lough Neagh is reported to have a surface area of 388 km² [1] , so the reading of 380 823 442m² isn't far off.

Future Uses and Ideas

  • Allow the user to change the colour of the polylines and area shading (including transparent)
  • Allow the area to be saved for later use

Version History

  • 23rd March 2014 - Added Hectares output
  • 6th August 2013 - Issue with perimeter output fixed
  • 21st February 2013 - Added square feet output
  • 8th January 2012 - Upgraded to Google Maps API V3 and some new features
  • 20th July 2010 - Added crosshairs and option to switch on/off crosshairs
  • 17th June 2010 - Added upload KML option (beta)
  • 2nd June 2010 - Moved the scale control to the top of map to stop conflict with Google Search bar
  • 2nd February 2010 - Added perimeter output in meters and kilometers
  • 25th March 2008 - Draggable markers, ability to click inside polygon and output in acres added
  • 26th June 2007 - Basic area calculation added
  • 24th June 2007 - Page created

Previous Comments For This Page

Ótima ferramenta. Como sugestão a página poderia permitir o download do perímetro gerado em kml ou kmz. Obrigado.
By Daniel on 30/07/2014

Haras Flávio 28 hectares
By Paulo Smith on 28/07/2014

Nice tools but the perimeter in a 2 point line should be just the length of the line not twice as it is now.
On 28/07/2014

Thanks for the utility!
By Michael Henry on 28/07/2014

Need to be able to download KML file
By Kate on 26/07/2014

it´s great but can´t print it. there are a way to print?
By cruz on 25/07/2014

Amazing tool and has offers variety of applications to users
By Harish on 21/07/2014

Really good.
By Indus hitech solutions on 18/07/2014

wonderfull, it`s very easy to use!
By alejandro. on 17/07/2014

Wonderful. What a tool. Great and Innovative idea. Thanks a lot. Calculated the area while actually surveying the land that I intend to buy! Thanks again.
By R Kumar on 13/07/2014

muy buen programa felicidades
By solorzano on 13/07/2014

Thank you, great streight forward solution
By Ido on 11/07/2014

By Humaid on 10/07/2014

Unfortunately you cannot save the map.
By Free Map Tools on 08/07/2014

Can you save the map?
On 07/07/2014

On 07/07/2014

Excelente, simplemente excelente
On 05/07/2014

too good ;-)
On 03/07/2014

Muy Bueno Gracias
On 03/07/2014

taroda 20 acres farm
By Aniruddha on 28/06/2014

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