The diagonal of the current device's display, automatically detected by the browser, is . In most practical cases, this calculated value does not correspond to the real extent and is instead proposed for consideration as an approximate one for consideration purposes. This circumstance is caused by the existing constraint imposed by the specifics of the interaction of modern web browsers (none of which has the functionality of providing web applications with access to information about the display’s physical parameters) with operating systems. Depending on the type and class of device, the probable error varies in a range of up to several centimeters, or 1 inch. Accordingly, to the best possible, the reliability of the indications of the uncalibrated online ruler will differ from the standard. Nevertheless, the deviation may be minimal. In this case, the initially visualized ruler will be suitable for measurements that do not require high accuracy (especially when measuring small objects).

Google measureonline

If you want to measure the actual size of a small object in inches or centimeters and you don’t have a real ruler at hand, this virtual on-screen online ruler will help you. You can make the necessary measurements on any device that allows you to browse the web. This online app works on both computers with a large screen (laptops, PCs, monoblocks or smart TVs) and mobile gadgets (phones, phablets, tablets, e-ink readers). The maximum length of the ruler (fully visible when displayed on a sufficient screen) is 20 inches, or 50 centimeters (500 millimeters) for the metric scale option.

This is the most reliable and easy way. Specify the size of the diagonal of your screen in inches ("). Enter this value in the input field located in the lower left corner of the ruler image. Then click the ↹ Calibrate or press the button ↵ Enter on the keyboard. You can also select the size from the drop-down list (which opens when you click the button ▾, which is adjacent to the numeric input field). This presents many of the most common options among users.The diagonal of the current device's display, automatically detected by the browser, is . In most practical cases, this calculated value does not correspond to the real extent and is instead proposed for consideration as an approximate one for consideration purposes. This circumstance is caused by the existing constraint imposed by the specifics of the interaction of modern web browsers (none of which has the functionality of providing web applications with access to information about the display’s physical parameters) with operating systems. Depending on the type and class of device, the probable error varies in a range of up to several centimeters, or 1 inch. Accordingly, to the best possible, the reliability of the indications of the uncalibrated online ruler will differ from the standard. Nevertheless, the deviation may be minimal. In this case, the initially visualized ruler will be suitable for measurements that do not require high accuracy (especially when measuring small objects). If you do not know the exact value of your screen’s diagonal, you can find it in the technical documentation attached to the device, or simply search the Internet for the model name. If for some reason this information is difficult to obtain and you have a standard plastic card with you, you can use the second method. ↓

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Keep in mind that the above instructions for setting up the ruler are valid only when the following conditions apply: Standard page scale adjustment in your browser (this is true for desktop browsers). When the scale is zoomed in/out, the ruler scale will shrink/stretch (along with other elements on the page that are subject to transformation during scaling). This will lead to a significant distortion of the online ruler readings. If you often, for example, change the font sizes on sites, be sure to set the scale to 100%; JavaScript is enabled; The ability to download images is enabled.

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For the ruler to display correctly (i.e., in proportion to the actual physical size), it must be calibrated. You can calibrate it in one of the following two ways:

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You can also calibrate the on-screen ruler using a bank payment card. Its standard width is 3.37 inches (3 3⁄8 inches), or 85.6 mm (8 centimeters, 56 millimeters) for the metric measurement. For your convenience, the corresponding sign is plotted under the scale of the ruler. Change the diagonal value in the input field until the edge of the plastic card attached (oriented horizontally) to the screen coincides with the black stroke to the left of the icon.

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If you do not know the exact value of your screen’s diagonal, you can find it in the technical documentation attached to the device, or simply search the Internet for the model name. If for some reason this information is difficult to obtain and you have a standard plastic card with you, you can use the second method. ↓

Using this method in addition to the first method will allow you to determine the size of the display diagonal. To avoid the known inconvenience associated with selecting a number by successive manual input, bring it to the desired value using the vertical scroll arrows that appear on the right side of the input field when you hover the cursor over it (when using the virtual ruler on a PC).