PangPang ToolsSide A (m) 3 · Side B (m) 4 · Side C (m) 5
First calculated quantity: 6.00000 m²Calculate triangle area and perimeter from the lengths of all three sides. All side lengths must form a nondegenerate triangle and share the same unit.
Area & Drawings
Heron Triangle Area Calculator
About this tool
Calculate triangle area and perimeter from the lengths of all three sides. All side lengths must form a nondegenerate triangle and share the same unit. This browser-local calculator updates from numeric inputs and shows a labelled breakdown without uploading your data.
Area measurement
Choose a task. Inputs stay in this page only.
Use Simple / draw for rectangles, circles and base-height triangles. Choose a shape tab above for other dimensions. Each shape keeps its own measurements.
MAKE IT SIMPLE
Result
Worked examples
MAKE IT SIMPLE
Result
Worked examples
10×8 m rectangle minus a 2×2 m void
80 − 4 = 76 m²Enter width A=10 and height B=8 in metres, then subtract a 2×2 m section.
Circle with diameter 2,000 mm
Approximately 3.142 m²Choose mm, select Circle and enter diameter A=2000. The radius is 1 m, so the area is π×1².
Place a point at (3.2, 3.3) m with 1 m snapping
Snaps to (3, 3) mNew points and dragged vertices align to the nearest grid position. Changing the spacing does not resize completed shapes.
Questions & answers
Can I enter a radius for a circle?
The field expects the diameter. Double a known radius first: a 1 m radius means a 2 m diameter.
Does changing grid spacing change existing areas?
No. The spacing affects new points and future vertex movement. Turn snapping off to enter arbitrary precise coordinates.
MAKE IT SIMPLE
Result
Worked examples
Parallel base A (m) 8 · Parallel base B (m) 5 · Perpendicular height (m) 3
First calculated quantity: 6.50000 mCalculate trapezoid area using its two parallel bases and perpendicular height. The height is the perpendicular gap between the parallel bases, not a sloping side.
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Result
Worked examples
Side length (m): 2
Hexagon area: 10.392305 m²Using these sample input values gives the first labelled output above. Requires six equal sides and six equal internal angles.
Questions & answers
Can I use the default numbers for purchasing or safety certification?
No. Replace the examples with your real values. Requires six equal sides and six equal internal angles.
MAKE IT SIMPLE
Result
Worked examples
Semi-major axis (m) 6 · Semi-minor axis (m) 4
First calculated quantity: 75.3982 m²Find ellipse area and a Ramanujan approximation for its circumference. Ellipse perimeter is an approximation; semi-axes are half-dimensions, not full widths.
CONVERT YOUR FILES
Result
Worked examples
PDF drawing, Meters per rendered pixel
Download locally processed resultRender page 1 of a PDF and click vertices to measure distance or polygon area at a chosen scale. Use a known length to calibrate; measurements are approximate, not CAD-certified.
Questions & answers
Is this an officially certified result?
Render page 1 of a PDF and click vertices to measure distance or polygon area at a chosen scale. Use a known length to calibrate; measurements are approximate, not CAD-certified.