Area Calculator

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

[11th July 2018] Unfortunately, due to a large price increase in back-end services, we can no longer offer some features on this page.

Measure an Area

Click Here To Load The Map

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

Read KML

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

Comments For This Page

Great map, maybe openstreetmap could be integrated along with other background styles? :)
By RUGGED STEVEE AKA BIG SAMMO on 18th October 2021

Very helpful, thank you very much!
By D on 16th October 2021

Just like what i am looking for. thanks
By Neng on 3rd October 2021

Thank you for area calculator help me a lot.
By singh on 19th August 2021

Johny, you can save an area using the User Menu above the map. You can then load the saved area at a later date.
By Free Map Tools on 9th August 2021

it is Very usefull. Thank you
On 5th August 2021

Super useful, thanks very much. Being able to save / bookmark the area mapped out would be a very handy addition, so looking forward to you implementing that!
By Johny M on 3rd August 2021

Laghari, please have a look at : Measure Distance on a Map.
By Free Map Tools on 13th July 2021

Very nice tool, please improve this for point to point measurement. Thanks.
By Laghari. on 10th July 2021

km are not matching improved system
By viral mistry on 19th June 2021

ye nice thanks
By Roland Sweden on 18th June 2021

The area mapped of region in km
On 13th May 2021

Used for calculating fenceline, great tool was more accurtate than walking tape measure
By Cam on 9th March 2021

I use this for my pond management business. Works great.
By david on 7th March 2021

Very useful. Thank you.
By Jonathan on 1st March 2021

Mere plot ki dimension Front 12. 9 inch Deapth 37feet Dusri deapth 33 feet Please caluculate total area in sqft
By Sanjeev on 16th February 2021

Very nice but point to point in-between measurement not display please do it well den.
By Asraf ali on 8th February 2021

6mtr. Lengths, 2mtr.height 1mtr. Squares
By Jose Gangmei on 31st January 2021

TÚlÚcharger Map stool
By Allali abdeslam on 16th January 2021

Hi Victor, it should be working as normal.
By Free Map Tools on 5th January 2021

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