← Back to all toolsMathematics · Class 5–10
Geometry Shape Calculator
Pick a shape, enter its dimensions and get area, perimeter, volume and surface area — with step-by-step working and a live diagram.
Circle
Area = πr² · Circumference = 2πr
📐 2D Shape Formulas
- Circle: A = πr², C = 2πr
- Square: A = a², P = 4a
- Rectangle: A = l×w, P = 2(l+w)
- Triangle: A = ½bh
- Parallelogram: A = bh
- Trapezium: A = ½(a+b)h
📦 3D Shape Formulas
- Cube: V = a³, SA = 6a²
- Cuboid: V = lwh, SA = 2(lw+lh+wh)
- Cylinder: V = πr²h, TSA = 2πr(r+h)
- Cone: V = ⅓πr²h, l = √(r²+h²)
- Sphere: V = (4/3)πr³, SA = 4πr²
💡 Useful Tips
- π (pi) ≈ 3.14159 (use 22/7 as approximation)
- Area is always in square units (cm², m²…)
- Volume is always in cubic units (cm³, m³…)
- Height of a triangle is always perpendicular to the base
- CSA = Curved Surface Area, TSA = Total Surface Area