# Area

Trying to figure out how many jelly beans there are in a mason jar or gallon jug? Here's our method of getting the number, but you can jump to the bottom and just use the calculator too.
One way to do it is to figure out the volume of the jar...

To calculate the cubic inches inside a jar or other cylinder shaped object, you will need to know the diameter and height of the jar then apply the following formula:
Let's say our jar is 8 inches in diameter and 12 inches in height.
Half...

To calculate the area of a circle, use the following formula:
Let's say our circle is 8 inches in diameter. Half of the circle's diameter equals it's radius (8 / 2 = 4). Square the radius (4 * 4 = 16). Multiply that by pi 3.1416 (16 * 3.1416 = 50...

The Topsoil Calculator will help you figure out how much topsoil or potting soil to buy, with a breakdown in terms of bags or yards. It will convert your measurements into cubic feet and yards so you'll know how much potting soil you'll need for...

To calculate the area of a Rectangle, use the following formula:
multiply the width with the height (width * height)

To calculate the area of a Parallelogram, use the following formula:
multiply the width with the height (width * height)

To calculate the area of a triangle:
multiply the base with the height (base * height)
divide the result in half ((base * height) / 2)

To calculate the area of a trapezium, which is essentially a rectangle with triangles on either side:
add together the top and bottom (top + bottom)
multiply the result with the height ((top + bottom) * height)
divide the result in half ((top...