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📊 Coordinate Grid & Polygon Area

A free, fast and browser-based coordinate grid & polygon area.

📏 Digital Screen Ruler

High-precision on-screen ruler with real-world physical calibration (credit card / PPI), dual movable markers, and unit conversions.

Millimeters 0.00 mm
Centimeters 0.00 cm
Inches (Decimal & Fraction) 0.00 in
Pixels 0 px
0
Δ

📐 Interactive Protractor

Interactive angle measurement tool with radial degrees, radians, trigonometric values, and supplementary angles.

degrees (°)

Angle Analysis

Degrees (θ): 45.00°
Radians: 0.7854 rad (0.2500 Ī€)
Complementary (90° - θ): 45.00°
Supplementary (180° - θ): 135.00°
Slope / Pitch (Grade): 100.0% (1 : 1)

Trigonometric Values

sin(θ) 0.7071
cos(θ) 0.7071
tan(θ) 1.0000
Classification Acute Angle

📊 Coordinate Grid & Polygon Area

Interactive Cartesian coordinate canvas. Plot points, measure distances, and calculate polygon area via Gauss's Shoelace formula.

Click or tap on the grid to add polygon vertices.
X: 0.00, Y: 0.00

Calculated Geometry

Shoelace Polygon Area 0.00 sq units
Perimeter 0.00 units
Centroid (X, Y) (0.00, 0.00)

Vertices List (0)

# X Y Action
📤 Export Results:

Frequently asked questions

Is it free?

Yes. No account is required.

Is my data uploaded?

Calculations run in your browser and require no database.

Does it work on mobile?

Yes, the interface is responsive.