Surface Area Calculator
Compute the surface area of common 2D and 3D geometric shapes
Calculator
Select a shape and enter its dimensions with units to calculate the surface area.
About the Surface Area Calculator
The Surface Area Calculator is a free online tool that allows you to quickly calculate the surface area of 2D and 3D geometric shapes. By entering the dimensions with units, you can determine the surface area in m². This is essential for engineering, design, construction, and material estimation tasks.
What You Can Calculate
- Surface area of rectangles, circles, and triangles (2D shapes).
- Surface area of cubes, rectangular prisms, spheres, and cylinders (3D shapes).
- Accurate area measurements for construction, manufacturing, and material planning.
Formulas Used
The calculator applies standard geometric formulas for surface area:
- Rectangle: A = l × w
- Circle: A = π × r²
- Triangle: A = (b × h) / 2
- Cube: A = 6 × a²
- Rectangular Prism: A = 2 × (l × w + l × h + w × h)
- Sphere: A = 4 × π × r²
- Cylinder: A = 2 × π × r × (r + h)
How to Use the Calculator
- Select the shape from the dropdown menu.
- Enter the required dimensions with appropriate units (m, cm, or mm).
- The calculator instantly displays the surface area in your chosen units.
- For 3D shapes, make sure to provide all relevant dimensions (height, width, radius, etc.) for accurate results.
Applications of Surface Area Calculations
Surface area calculations are widely used in engineering, construction, and design. Key applications include:
- Estimating material quantities for painting, coating, or fabrication.
- Designing structural components such as panels, beams, and containers.
- Performing geometry exercises and visualizing shapes in 2D and 3D.
- Planning and optimizing manufacturing processes that require precise surface measurements.