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?
Show Crosshairs?
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.

To draw a new area click the [Start a New Area] button or press Alt+n


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
  • Export to KML option

Version History

  • 17th June 2015 - Markers now show their lat/lng when you hover over them
  • 18th December 2014 - Total area is now calculated
  • 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

2017 PWC area
By MJB on 14th January 2017

Is there a way to have two saved "how far can I travel" areas laid over each other to identify the overlapping portion?
By JMS on 13th January 2017

By JVCV-HUAROHIRI on 10th January 2017

Summer Lakes Acreage
On 5th January 2017

I wish you could deselect certain areas
By puddles on 5th January 2017

Fantástica ferramenta de trabalho para agricultura Obrigado
By Manuel on 4th January 2017

parabens vc conhece muito as dficuldades do homem do campo obrigado
On 30th December 2016

On 28th December 2016

Gracias Por la Ayuda ,Es muy buena Herramienta,Saludos
By Rene on 24th December 2016

By JLIZ on 24th December 2016

Muy buena herramienta!! muchísimas Gracias!!!
By Rolando on 19th December 2016

Muy útil la hoja de cálculo, práctica y segura
By enrique jimbo on 16th December 2016

On 13th December 2016

Very useful and interactive site. Great job guys!
By Biju Punnooran on 9th December 2016

very good approximate method and we need to print or save results by GPS ordients
By mohamed reada on 7th December 2016

muchas gracias me sirvio de gran ayuda
By santiii on 5th December 2016

I love this website! So useful!
By dildo_shwaggins on 3rd December 2016

already cleared area
By Indaka on 3rd December 2016

Calculo área Expediente 4402
By Luis castro 4402 on 1st December 2016

By manju on 1st December 2016

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