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
Area Output
Perimeter Output
Options
Read KML
Instructions
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
Information
The area calculator tool allows you to find out the area that is enclosed inside a closed polyline overlaid on a map.
Benchmarks
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
very useful application.
Gives almost correct area if you know your approximate boundary points.
Great
Thanks.
By Shriram Patil on 6th May 2025
Good
By Abdullah on 2nd March 2025
Great work on creating such an useful tool
On 3rd February 2025
Amazing tool. Thanks for providing it for free!
On 20th January 2025
Super helpful, great site, thanks :)
On 14th November 2024
Very helpful
On 12th October 2024
very helpful
On 12th October 2024
Nice and very useful
By Navghan on 27th June 2024
You have no idea how much this page has helped me in multiple occassion. Numerous times. Generous features.
On 31st May 2024
Very helpful tool. Thank you
On 18th April 2024
awesome tool
On 13th April 2024
hello,
any way this could have an addition option to type in an external co-ordinate/waypoint? ..as part of the area drawn
On 13th April 2024
best tool for area and elevation measurement
On 27th March 2024
thank you team
By Sam on 25th March 2024
great tool
On 21st February 2024
Paris France
On 11th December 2023
Great Site tool
By Franz on 27th October 2023
easy
On 9th October 2023
Good job
By Carding on 3rd October 2023
Very ggod
By Mike on 25th September 2023
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