Draw Shapes.
Calculate Area.
Upload a plan or photo, sketch odd shapes or polygons, and get instant, accurate measurements. Free, fast, and mobile-friendly.
Powerful Features
Everything you need to measure irregular areas accurately.
Interactive Drawing
Click to add points, drag to refine, undo/redo anytime.
Image Upload & Trace
Import a plan/photo, set scale, then trace outlines precisely.
Accurate Units
Switch between m², ft², acres, or define your own custom unit.
Composite Shapes
Add/cut rectangles, circles, sectors, and segments fast.
Multi-Layer Projects
Work with multiple shapes/layers and toggle visibility.
Live Results
See area, perimeter, vertex count, and shape stats in real time.
How it works
Upload or Start Blank
Drop a plan/photo or start with a blank canvas.
Draw & Edit
Click to create points, drag vertices, use undo/redo to refine.
Set Scale & Get Results
Set a known distance; results update instantly in your chosen unit.
Why choose our calculator?
Fast & Lightweight
Minimal bundle with code-splitting so the editor loads only when needed.
Private by Design
Everything runs in your browser. Your drawings stay on your device.
Built for Real Work
From gardens to floor plans—precise scale control and robust editing.
Frequently Asked Questions
How do I calculate the area of an irregular shape?
Draw a closed polygon around the shape. Set scale (if using an image). The area and perimeter update live.
Can I trace from photos or plans?
Yes. Upload the image, set a known distance to scale, then trace the outline.
Which units are supported?
Square meters, feet, yards, acres, hectares—and a custom unit if you prefer.
Is it free to use?
Yes. The core features are free and work on desktop and mobile.
How accurate are the results?
Accuracy depends on your point placement and scale. You can add more points and refine vertices anytime.
How to calculate the area of irregular 4-sided shapes?
Divide the shape into two triangles, find each triangle’s area, and add them. If you enter the four points in order, the calculator applies the shoelace formula and gives you the exact area automatically.
Ready to measure?
Draw your irregular shape, quickly get area results, and export when you’re done.
Start Calculating Now