Length (l)
Width (w)


Edge 1 (a)
Edge 2 (b)
Edge 3 (c)


Base 1 (b1)
Base 2 (b2)
Height (h)


Radius (r)


Radius (r)
Angle (A)


Semi-major Axes (a)
Semi-minor Axes (b)


Base (b)
Height (h)

Area Calculator

Area calculator is a tool for calculating the area of various two-dimensional shapes such as rectangles, triangles, trapezoids, circles, sectors, ellipses, and parallelograms. Area calculators are mostly used by students and professionals in fields such as mathematics, engineering, and architecture.

Online area calculator is a great way to quickly and easily calculate the area of two-dimensional shapes. Whether you're trying to find the size of a room for painting or flooring, or you need to know the acreage of your property for landscaping purposes, an online area calculator can help. We'll show you how to use our online area calculator to find the areas of common shapes such as rectangles, triangles, trapezoids, circles, sectors, ellipses, and parallelograms. Read on to learn more!

What is an online area calculator and how does it work

An online area calculator is a convenient tool to help calculate the surface area of objects such as cuboids, rectangles, triangles, circles and other shapes. All that is required to use the calculator is the input of either measurements or dimensions. After filling in these details, the calculator will automatically work out the object's area. The results of an online area calculator are typically provided in either square meters or square feet, though other units of measurement may be used depending on the precise nature of the calculations required. In addition to measuring planar areas, some calculators also allow users to measure surface areas of 3D objects. This makes online area calculation a versatile tool used widely in fields ranging from engineering and architecture to everyday construction projects or landscaping tasks.

How to calculate the area of a two-dimensional shape

Calculating the area of a two-dimensional shape is an important geometric skill that can be easily learned with some simple math. To calculate the area, you must determine the length and width of the shape and then multiply them together. For both irregular and regular shapes, all sides should be accurately measured with a ruler or tape measure to ensure accuracy. The resulting product is the area of the two-dimensional shape in square units such as inches, centimeters, etc. It can be helpful to draw a diagram or make a sketch of your shape before doing any calculations. Practicing these steps will help you develop strong spatial skills and confidently work with two-dimensional shapes in geometry and beyond!

How to calculate the area of rectangles

Calculating the area of a rectangle is a simple process that can be done with nothing more than basic mathematics knowledge. To determine the size of a rectangular area, you need only know two measurements: the length and width of the figure. By multiplying the two together, you get the area in the form of square units. If it helps, you can picture it as a grid of squares or rectangles being filled in by smaller shapes until you reach the desired space. It's an intuitive way to visualize how different dimensions result in an overall larger combined total. Keeping this mental image in mind can make understanding this concept easier and faster, no matter what level of math avidity you have.

How to calculate the area of triangles

Calculating the area of a triangle is a fundamental skill in mathematics. It requires a thorough knowledge of some basic geometry principles, such as understanding the relationships between angles and side lengths. You will often find calculating the area of triangles useful when dealing with more complex shapes or patterns. The most common method of determining the area of a triangle involves multiplying half of the triangle's base times its height. This gives you an approximate answer which can be adjusted if necessary to fit other geometric constraints. Knowing how to calculate the area of triangles quickly and accurately is essential for anyone interested in mathematics and geometry.

How to calculate the area of trapezoids

Calculating the area of a trapezoid can seem like a daunting task, but don’t be intimidated – it’s actually quite simple once you know the formula! All you need to do is find the average of the two parallel bases, and then multiply that number by the height of the trapezoid. That's it! With this information on hand, calculating the area of a trapezoid is easy: just set up an equation and you'll be able to find its area in no time. Start practicing today and soon you will be a master at calculating the area of trapezoids!

How to calculate the area of circles

Calculating the area of a circle is a simple task that does not require advanced mathematical knowledge. To start, you must find the radius, which is the distance from the center of the circle to its perimeter line. Once found, all you have to do is multiply pi (3.1415) by the radius’s length squared. The result of this multiplication will give you your desired area in square units. It's important to remember that measuring and rounding off your measurements accurately is key in obtaining precise results when calculating a circle's area.

How to calculate the area of ellipses

Calculating the area of an ellipse can seem intimidating, but with some basic knowledge, it's not as difficult as it may seem! When calculating the area of an ellipse, you need to know two things: the length of its major and minor axes. These are axes that run roughly parallel to what we consider the length and width of a shape. The formula for finding the area of an ellipse is simple - just take π times the major axis length multiplied by the minor axis length. Knowing this simple formula means anyone can calculate the area of an ellipse quickly and accurately. Put your math skills to work, and you’ll be able to determine the area of any ellipse in no time!

How to calculate the area of parallelograms

Calculating the area of a parallelogram is an easy and useful skill to have. It requires only basic knowledge of geometry and can be done with just a few simple steps. First, measure the length and width of the parallelogram in order to calculate its base and height. Then multiply the two values together to get the area of the shape. For more complicated shapes, it might be necessary to calculate several separate areas before adding them all together. No matter how complex the parallelogram is, understanding this technique makes it easier to solve many math problems quickly and correctly.


In conclusion, an online area calculator is a powerful tool when it comes to quickly and accurately calculating the area of two-dimensional shapes. Knowing how to calculate the area of rectangles, triangles, trapezoids, circles, ellipses and parallelograms are all useful skills that many people use in everyday life. But why take the time to learn them all when you can simply input the same measurements into an online calculator and get instant results? Not only is CalculatorLord's online area calculator easy to use, it can save you hours of time while also giving you finely tuned calculations with pinpoint accuracy. So if you find yourself with a tricky area problem that needs solving in a hurry: give CalculaorLord's area calculator a try!