Geometry Calculator
Calculate areas, perimeters, volumes, and more for various geometric shapes. Perfect for homework, projects, and professional calculations.
Select Shape Category
Rectangle
Area: -
Perimeter: -
Circle
Area: -
Circumference: -
Diameter: -
Triangle
Area: -
How to Use the Geometry Calculator
2D Shapes
- • Rectangle: Enter length and width to get area and perimeter
- • Circle: Enter radius to calculate area, circumference, and diameter
- • Triangle: Enter base and height for area calculation
3D Shapes
- • Cube: Enter side length for volume and surface area
- • Sphere: Enter radius for volume and surface area
- • Cylinder: Enter radius and height for calculations
Geometry Formulas Reference
2D Shapes
Rectangle
Area = length × width
Perimeter = 2(length + width)
Circle
Area = π × radius²
Circumference = 2π × radius
Triangle
Area = ½ × base × height
3D Shapes
Cube
Volume = side³
Surface Area = 6 × side²
Sphere
Volume = ⁴⁄₃π × radius³
Surface Area = 4π × radius²
Cylinder
Volume = π × radius² × height
Surface Area = 2π × radius × (radius + height)
Common Use Cases
Homework & Study
Check your math homework, verify calculations, and learn formulas step by step.
Home Projects
Calculate materials needed for DIY projects, room measurements, and garden planning.
Professional Work
Quick calculations for engineering, architecture, design, and construction projects.
💡 Pro Tips
Accuracy
Results are displayed with appropriate precision. Use the full precision for chained calculations.
Units
All calculations work with any units - just make sure you're consistent (all in cm, all in inches, etc.).
Angles
The angle converter helps you work with degrees, radians, and gradians for advanced calculations.
Mobile
All tools work perfectly on your phone or tablet - great for field work and on-the-go calculations.