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.


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

  • 17th June 2015 - Markers now show 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

excelente herramienta gracias
By miguel on 26/06/2015

By know on 26/06/2015

Hi, please try Measure Distance on a Map for linear distances.
By Free Map Tools on 25/06/2015

Could you provide linear distances between points?
On 25/06/2015

muchas gracias por tan excelente herramienta como la como la exporto a Autocad y civil
By Edgar Gomez on 24/06/2015

Excelente página de ayuda para consultar áreas y longitudes!!! que gran idea!!! el uso de la tecnología al servicio del hombre, Gracias!!
By luis ortiz on 24/06/2015

gracias por la ayuda me sirvió mucho los datos
By armin on 23/06/2015

6/23/2015 Buckley's Daughter's LLC Project "Still-Byrnes-Hill; Field 21 Acres: 35.8
By Blue Mountains Pheasants Forev on 23/06/2015

SCS Artificial Lift - Lafayette, LA: 111 Row 1, Lafayette, LA 70508 Area mapped for industrial activity.
By Don Stephens on 22/06/2015

pregunta: como se traslada esta información a un archivo, espero respuesta y saludos muy buena herramienta.
By Hugo Montes de Oca on 18/06/2015

Hi Rocky, the markers now display the lat/lng when you hover over them.
By Free Map Tools on 17/06/2015

Espectacular esta herramienta, congratulaciones.
By walter on 17/06/2015

Excellent program. One point: GPS Coordinates for the markers would be a great help.
By Rocky on 17/06/2015

By waldo palomino on 13/06/2015

By MARJHURET on 12/06/2015

muy buen programa de mucha ayuda
On 11/06/2015

Excelente herramienta
By neo on 10/06/2015

Herramienta buenisima y facil de usar
By Mario Reina O on 10/06/2015

excellent for calculating food plot acreage
On 09/06/2015

By EUSTAQUIO on 06/06/2015

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