How to Calculate Area Posted by Calculator Study April 3, 2025 How to Calculate Area - Interactive Calculator & Guide Area Calculator Rectangle Triangle Circle Square Calculate Clear All Area Formulas ShapeFormulaVariables RectangleLength × Widthl = length, w = width Triangle(Base × Height)/2b = base, h = height Circleπ × Radius²r = radius SquareSide²s = side Calculate square root Post navigation Previous Post Surface Area CalculatorNext PostCircle Area Calculator