Area Calculator
Find the area of circles, rectangles, triangles, and other geometric shapes.
Your inputs
Choose a shape, then enter its dimensions and units.
Select Shape:
Your result
Switch the output unit to compare measurements.
Area
0.00
About Area Calculator
The Area Calculator helps you find the area of various geometric shapes. Whether you're working on a home improvement project, studying geometry, or planning a garden, this calculator provides quick and accurate area measurements.
Area Formulas
- Rectangle: Area = Length × Width
- Circle: Area = π × Radius²
- Triangle: Area = ½ × Base × Height
- Trapezoid: Area = ½ × (Base a + Base b) × Height
Common Unit Conversions
- 1 square meter (m²) = 10.764 square feet (ft²)
- 1 square foot (ft²) = 144 square inches (in²)
- 1 square meter (m²) = 10,000 square centimeters (cm²)
- 1 acre = 4,046.86 square meters (m²)
Tips for Accurate Measurements
- Always measure twice to ensure accuracy
- Use the same unit for all measurements within a calculation
- For irregular shapes, consider breaking them down into simpler shapes
- When measuring rooms, account for alcoves, bay windows, and other features