An area calculator measures flat surfaces for common shapes in one place. Pick a shape, enter its measurements, and it returns area and perimeter together. Students, DIYers, and planners use it daily.
The Shape menu controls which fields appear: Side for squares, Width and Length for rectangles, and Side a, Side b, and Side c for triangles, plus Radius or Base for circles.
Every shape has its own formula: a rectangle uses length x width, a triangle uses half the base times height, and a circle uses pi times radius squared. Perimeter adds all sides.
Example: a rectangle with Length 8 and Width 5 gives area 8 x 5 = 40 and perimeter 2 x (8 + 5) = 26 units. A 3, 4, 5 triangle gives area 6 and perimeter 12.
Circles work the same way once Radius is filled. Set the Shape menu accordingly, type 4 into the Radius box, and click Calculate Perimeter and Area: the area comes to about 50.27 square units and the perimeter to about 25.13. That pairing suits real projects nicely, since a round flower bed with a 4 meter radius covers roughly 50 square meters of soil and needs around 25 meters of edging strip. One habit keeps the numbers honest: when Radius is measured in meters, both results arrive in square meters and plain meters, never mixed.
Select the shape first so the right fields show, enter numbers in one consistent unit, then click Calculate Perimeter and Area. Leave unused boxes empty rather than typing zeros.
Remember that length times width produces square units, not plain units. Round only the final result, because rounding Radius or Base too early skews the answer.
It covers squares, rectangles, triangles, and circles, using fields like Side, Width, Length, Radius, and Base. Each shape adapts the input form to its own measurements.
No. Only the fields belonging to your chosen shape matter, so fill those boxes and leave the rest untouched. Extra or zero entries are ignored.
Any unit works as long as all measurements share it. Mixing feet with inches makes the area wrong, so convert everything to a single unit first.
Yes. One click of Calculate Perimeter and Area returns both results side by side, handy when you need fencing around a known space.
Three side lengths must satisfy the triangle inequality: any two sides together must exceed the third. Sides 1, 2, and 10, for example, fail it.