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Calculators
- Rectangle & Square Area Calculator — Calculate a rectangle or square from length and width, with perimeter and area conversions.
- Circle Area Calculator — Calculate circle area and circumference from its radius, then convert the result.
- Triangle Area Calculator — Find triangle area using a base and its perpendicular height.
- Trapezoid Area Calculator — Calculate trapezoid area from two parallel sides and their perpendicular separation.
- Ellipse Area Calculator — Calculate ellipse area from two semi-axes, with an approximate perimeter.
- Parallelogram Area Calculator — Calculate parallelogram area using base and perpendicular height.
- Area Unit Converter — Convert square meters, square feet, acres, hectares and other square units.