What you get
Calculate area and perimeter of rectangles, circles, triangles and other common shapes.
How to use it
Enter only the requested values and check the unit shown beside each field. The main result gives the figure to use first. Details explain conversions, secondary quantities and rounding. Change any value to compare another situation without starting again.
Before using the result
Open the calculation details to follow values and steps. Check that the inputs match the shape or data series being studied before using the result. For lengths, use the same unit in every field.