Area & Perimeter Calculator
Fast area & perimeter for square, rectangle, triangles, circle — with formulas.
About Area & Perimeter Calculator
Calculate area and perimeter in seconds — clean, fast and accurate.
SHAPES
• Square, Rectangle, Circle
• Triangles: scalene (Heron), equilateral, isosceles, right triangle (auto hypotenuse), base × height
FEATURES
• Live diagrams with labeled sides
• Step-by-step formulas shown with every result
• 6 length units (mm, cm, m, km, in, ft) + automatic area conversions
• Extras: diagonal, height, hypotenuse, diameter
• Copy & share results
• Dark, modern design
• 10 languages
Perfect for students, teachers, DIY, construction, flooring, tiling, gardening and everyday measuring.
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