Calculate Land Area on a Map - Free Area Calculator
Draw shapes to measure land in square metres, hectares and acres. Ideal for property, farming and planning.
Draw a shape on the map - a polygon or rectangle - and this tool will calculate its area using geodesic mathematics that account for the Earth's curvature. Results are shown in square metres, hectares, acres, and square feet. Commonly used by estate agents measuring plots, farmers assessing field sizes, and homeowners checking garden dimensions. Switch to satellite view for the clearest boundary visibility, and draw multiple shapes to get individual and combined totals.
Free Online Area Calculator
The MapTools Area Calculator is a free tool that lets you measure the area of any shape drawn on a map. Simply draw a polygon or rectangle around the land you want to measure, and instantly see the area in square metres, hectares, acres, or square feet.
Whether you're an estate agent measuring property boundaries, a farmer calculating field sizes, or a homeowner curious about your garden area, this tool makes it easy to get accurate measurements without any specialist software.
Who Uses This Tool?
Measure property plot sizes and garden areas for listings.
Calculate field sizes for crop planning and land management.
Estimate land area for construction projects and planning applications.
Measure garden or lawn area for landscaping projects.
Verify plot sizes when purchasing land or property.
Quick area estimates for initial assessments.
Supported Units
The Area Calculator supports both metric and imperial measurements:
- Metric: Square metres (m²), hectares (ha), square kilometres (km²)
- Imperial: Square feet (sq ft), acres, square miles
Toggle between metric and imperial using the buttons in the sidebar. The perimeter (total boundary length) is also calculated automatically.
How to Use
- Navigate to your location - Zoom and pan the map to find the area you want to measure
- Select a drawing tool - Click the polygon (for irregular shapes) or rectangle tool in the top-right corner
- Draw your shape - Click on the map to place points. For polygons, click to add each corner, then click the first point to close the shape
- View results - The area appears instantly in the sidebar and as a popup on the shape
- Draw more shapes - Add multiple shapes to calculate a combined total area
- Edit if needed - Use the edit button to adjust your shapes
Accuracy
This tool uses the WGS84 coordinate system and calculates geodesic area, which accounts for the Earth's curvature. For most practical purposes, the measurements are highly accurate.
For legal or surveying purposes, always verify measurements with a professional surveyor. This tool is designed for estimates and general planning, not legal documentation.
Frequently Asked Questions
How accurate are the area measurements?
The tool uses the WGS84 coordinate system and calculates geodesic area, which accounts for the Earth's curvature. For most practical purposes the measurements are highly accurate. For legal or surveying purposes, always verify with a professional surveyor.
Can I measure irregular shaped land?
Yes. Use the polygon tool to draw any shape by clicking to add corner points. Close the shape by clicking the first point again. You can also use the rectangle tool for regular shapes.
What is the difference between hectares and acres?
One hectare is about 2.47 acres. Hectares are the standard metric unit for land area in the UK and Europe, while acres are the traditional unit still commonly used in property listings. You can switch between metric and imperial units using the toggle in the sidebar.
Can I measure more than one area at a time?
Yes. Draw multiple shapes and the tool will calculate each area individually as well as the combined total. This is useful for measuring separate fields, plots, or sections of a property.
Does this work for large areas like farms?
Yes. The geodesic calculation works accurately at any scale, from small gardens to large agricultural estates. You can switch to satellite view to see field boundaries more clearly when measuring farmland.
Related Guides & Tools
More mapping tools for land and distance calculations:
- Radius Map - Draw circles to visualise distances from any point
- Measure Distance - Calculate distances along roads and paths
- Distance Between Two Places - Quick straight-line distance checks
- Flood Risk Checker - Check if land is in a flood zone
- Data Sources - Where our data comes from and how it's updated