Example input and settings
5 m × 3 mMath & measurement · MAT-04Submit an issue
Area calculator
Calculate rectangle, triangle, circle and trapezoid areas with dimension units, radius or diameter input and copyable results.
Four shapes · Mixed units · FormulasDimensions
Results
Result unit
Click a row to copy; the top-right button copies all.
- Area
- Perimeter
- Formula
- Calculation
Lengths in the calculation use: Metres (m)
Height is perpendicular. Choose radius or diameter for circular shapes. Bases and height do not determine triangle or trapezoid perimeters. Results use up to 12 significant digits; results involving π are approximate.
Calculate area from shape and dimensions
Choose a shape, enter dimensions and select each unit. Circles accept radius or diameter; height is perpendicular. View area, formula and calculation; copy a row or all results. A 5 m × 3 m rectangle has area 15 m² and perimeter 16 m.
Check the input format and options with this example before using your own data. Random values, file sizes and presentation vary with the input and settings.
What to check in the result
15 m²
16 m