Best Tools to Measure Length, Width & Height of your Computer Screen

Whenever we look at any object, the first question came is of its size. Although size is not that important sometimes we want to know the size for curiosity. And, sometimes we need to measure the dimensions of the object.

Although there are so many instruments for measuring the dimensions. Dimensions mean length, breadth, and height. Normally we use paint for resizing our pictures. But, there are online tools are also available.

In Engineering Auto-cad is the main tool for measuring all the dimensions of any object. In fact, in Auto-cad you can view your object in 2D or 3D. You can rotate your whole object and able to see all the views. In Engineering there are mainly four types of views: Front view, Side view, top view, and Bottom view. The side view is either left or right. In Auto-cad you get exact measurement details of the object. It is the best tool as I had used it.

Of course, there are tools around that can easily tell you how many pixels on the screen it is from one point to another. But actually measuring something in inches or centimeters is a little more tricky. For this you either you have to convert into pixels using a converter or any other tool.

If you are working online for a website or any software. It requires some specific dimension pictures or objects. You can not place more than that of or not even less than. In this, you just have to select the perfect size and for the perfect size, dimensions must be known.

Why do we require to Measure length, breadth, and Height?

If you have any object in your hand then it is easy to measure the object. But, what if you have the object on your screen? Then can you simply measure the object by ruler or tape? Measuring the length, breadth, and height is also important for your graphic work as well.

Then no to worry there are so many utilities available to resolve your problem. There are many tools to help you find out a variety of different measurements either in the real world or virtually on the screen.

But, before proceeding to the tools you must know about the calibrated ruler. an accredited, traceable quality system that has everyone in the workplace measuring to the same scale. If you are going to use one of these rulers for a more accurate measurement or to measure a real-world object against it. Then the ruler needs to be calibrated so the inches/centimeters are correct.

This will differ from screen to screen because of different resolutions and monitor dimensions etc. For the best results, you need to know the resolution of the current display (i.e; 1920×1080). And the monitor’s exact diagonal size in inches. Using a value of 22 inches when your monitor is actually 21.5 will still produce a slightly inaccurate measurement and needs to be as exact as possible.

Best Tools to Measure the Length, Breadth, and Height of your Computer Screen

So before proceeding further collect the information of your system that is mention above. Then you have to visit PPICalc web page. Here you have to enter the horizontal and vertical resolutions and the diagonal size.

After entering the information it will output a PPI (Pixels Per Inch) number on the page. That is useful for you to enter into the utility if it allows you to for the most accurate measurements. Most of the tools that allow this will let you enter only a whole number without decimal places. That is not 100% accurate but still very close to exact.

Screen Dimentions

Online you can find so many tools but here we are trying to provide some of the best rulers. You may compatible with the online tool.

  1. JR Screen Ruler
  2. PixelZoomer
  4. On-Screen ruler
  5. A Ruler for Windows
  6. N Scale Ruler
  7. MB Ruler
  8. Pixel Ruler
  9. Universal Desktop Ruler
  10. Cool Ruler

JR Screen Ruler

JR Ruler can display pixels, inches or centimeters. The size of the ruler can simply be extended by dragging the small slider. The right-click menu gives you the options to flip the ruler from horizontal to vertical. Mark the exact center of the ruler, snap it to the left edge of your desktop screen. And set the pixels per inch for a more accurate measurement as mentioned above.

JR Screen Ruler

It offers some other functions like color changing and ruler rotation. But they have hardly used functions. JR Screen Ruler is very portable and works on Windows 95 to 7. You can even run the ruler from your USB drive. Its interface has a very significant similarity to those “conventional rulers.”

In the first instance, this ruler will appear with a size too small that surely will not cover the entire width of the screen. As the above mention, you can easily large its size by dragging the small slider. JR ruler is small in size that is 494 KB. And you can try it for 15 days. It’s Pro version offers to customize color, setting transparent color, ruler rotation, capture active window size and more.

PixelZoomer– Measure Dimensions

It is quite an impressive tool for a precise and accurate measurement of distances. You can easily pick color values as well. PixelZoomer is mainly for the analysis of those websites that have to be realized pixel perfectly. This is a free program mainly designed for Windows. You can use it without any restriction.

The download has a Windows installer without having any Adware. That means you can download its portable version without any installation process. Depending on the browser or application, buttons, images, and texts have to be aligned precisely. A sense of proportion is not enough if distances have to be exact that means a digital ruler is required.


The typical workflow could be characterized by taking a desktop or window screenshot. Open it in an image editing program and measure distances with a selection tool. A time-consuming endeavor which has to be done many times before the product is finished.

The application creates a desktop snapshot automatically and directly enables a pixel-based analysis. It will also capture the actual web browser so you can quickly measure distances and pick color values. You can enlarge the screenshot easily by using the integrated magnifier.

PixelZoomer is primarily made for web designers, front-end developers, and HTML/CSS programmers. In these areas, developers have a powerful layout tool with CSS: typography, user interface elements or even visual effects can be realized according to a design template. But the pixel-perfect alignment and centering is not always an easy task.

iRuler is a plain and simple web page with a static ruler. You can measure real-world objects against, or resize the browser window and drag it to where you want. Before using the ruler make sure to check your monitor dimensions are correct under the ruler.


If they are not, click the link to select from a small list. Or select even more to enter your own and input the diagonal size of the monitor and its aspect ratio. If you do not know the aspect ratio then you can calculate it easily. Take the monitor’s horizontal resolution and divide by its vertical resolution.

This is a very nice app with which you can easily measure the dimensions of your object. It automatically detects the resolution of your monitor, so that centimeters and inches can be real. But always keep in mind before using it you know accurate data of your system.

On Screen Ruler

On-Screen Ruler is another simple measuring tool that can display the measurements in inches, centimeters, pixels, picas or a percentage. It is a portable tool and you can easily use this tool without any installation process. You can also directly use this from your USB drive.

On Screen Ruler

It also has a transparency slider option and the font and colors can be configured to your liking. The ruler can simply be resized by dragging it from the edges, multiple rulers can be used by pressing Ctrl+N to show another on screen. There is an option to calibrate the ruler but this is only by means of a couple of arrows.

But there is no function to set the calibration using pixels per inch (PPI). And without proper calibration, you are not able to know whether this ruler is accurate. For accuracy, you to physically measure it with a real or another properly calibrated virtual ruler.

A Ruler for Windows

This measurement utility is more of a web or graphic design tool because it only measures in screen pixels and not centimeters or inches etc. The ruler itself comes with 4 different skins to choose from. There is a reading guide mode which turns off the numbers and markers so you can use it to read documents or books with.

A Ruler for Windows can run as many times as you want, which, together with its two orientations -horizontal and vertical. That will make it easy for you to measure the dimensions of any window or image inside your computer.

A Ruler for Windows

Although it lacks so many features. A Ruler for Windows does have other exciting features such as the ability to customize its appearance, length, and layout of the units.

The ruler can be flipped into vertical mode and resized or locked into position. There is also a zoom mode which can zoom into your desktop up to 4x to get more accurate measurements. It is compatible with Windows 2000 to Windows 8.

N Scale Ruler– Measure Dimensions

N Ruler is a Java application which requires the Java Run time Environment v6 or higher to run. It defaults to displaying both horizontal and vertical rulers at once. Each of which can be hidden and independently measure in pixels, inches, centimeters, and picas.

N Scale Ruler

The rulers can be accurately moved around the screen a pixel at a time if needed using the keyboard. There are markers to mark the center of the ruler or a specified distance. And a useful converter can quickly convert from one of the supported measurements to another. Works on Mac and Linux in addition to Windows.

MB Ruler

MB-Ruler is a new on-screen ruler tool aimed at mathematicians, architects and those interested in measuring distances and angles on the desktop. If you want to measure the diagonal of the screen or have created a solid geometric figure in the graphics programs, this is the perfect tool for this purpose. The distances, angles, and diagonals can be measured in pixels, inches, centimeters or points.

MB Ruler

That means you can say it is the tool that is for advanced calculations. By using MB-Ruler, you can create an auxiliary tool (triangles, lines) that specifies the height and width of a geometric figure or a selected area. As the tool is transparent and you can use other programs parallel to this program. Besides, you can create guides, drainage points, rectangles, bitmaps and descriptive text of the object’s length and width.

Other notable features include a color picker, screen capture, a grid system with snapping, screen loupe function and overlayed shapes and lines or points, etc can be placed around the screen. A standalone version can be created from the options menu.

Pixel Ruler

Pixel Ruler represents a useful online screen tool for designers with which they can make measurements of any element represented on the screen. The unit of measure used in this rule is the pixel. It is the ideal complement to know the size and position of objects.

Drag and drop it anywhere on the screen. It has three attractive ‘skins’ or skins in the colors: orange, green and blue.

Pixel Ruler

With a single click, it is possible to change the horizontal orientation of the rule, which brings, by default, the vertical. The resolution of this reaches 1300 pixels. The app shows the numerical value of the pixel on which the mouse is located. Here the calculation will be yours.

Universal Desktop Ruler

The rules are great for straight-line distances, but would a ruler be an excellent choice to measure the length of a river or road? What if you measure a distance along the streets from one city to another? How would you measure curved lines with a straight rule? And, for this, the solution is Universal desktop ruler.

Universal Desktop Ruler allows you to measure not only a straight line distance but any curved distance on the screen.

Universal Desktop Ruler

Universal Desktop Ruler allows you to quickly and accurately measure distances, areas, and perimeters of figures on the screen. You can determine the scale and obtain results in pixels and their units of measure (feet, inches, meters).

The universal rule of the desk is useful for measuring distance and area on a map, finding the area and the perimeter in a house project for example. Besides, Universal Desktop Ruler has a screen magnification feature.

Cool Ruler

Cool Ruler is a very old utility but still seems to install and work fine on Windows 7 32-bit. But on 64- bit it will not work. Unlike some of the tools here, it can create a custom ruler to match the pixels per inch of your screen to give more accurate measurements.

Just go to Custom settings and enter your PPI in the Unit Size box. There is also a handy calculator built into the program, multiple rulers can be added to the desktop, markers can be created and the fonts can be altered if they are a bit small.

It is also possible to modify the ruler scale, clear marks, change the mark color and font, as well as bring up additional rulers (i.e. multiple instances are allowed). The app also integrates a scientific calculator, which is available through the main screen.

Cool Ruler has a good response time and uses minimum system resources, so it does not decrease overall performance. No error dialog has been shown in our tests, and the utility did not hang or crash. All in all, Cool Ruler offers a simple solution to using an on-screen, multipurpose ruler.


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