When you need to quickly measure something, but there is no centimeter or tape measure at hand, as luck would have it, an online ruler will help. It is a simple web-based tool that is displayed on the device screen in full size. It allows you to find out quite accurately the size of a drill, a notebook and any other object that can be attached to a computer monitor or smartphone screen.
A very accurate online ruler with a scale in millimeters. It automatically detects the diagonal and resolution of the screen, and then immediately calibrates. Supports working on mobile devices.
In addition to the usual line, the site contains "digital copies" of more than 400 life-size items that will help you understand the real sizes of smartphones, watches and other things and compare them with those at hand.
This online ruler allows you to set the size of an object by adjusting the area on the screen, and immediately see the measurement result with an accuracy of one hundredth of a centimeter. Four scales are located around the perimeter of the screen, which is convenient for measuring large objects. The service is not adapted for mobile devices, so it is better to use it on a computer.
Regular and angular rulers in centimeters and inches are available in PreciseRuler. If the scale is detected incorrectly, you can manually calibrate by specifying the diagonal of the display in inches. The tool works correctly on both computers and mobile devices.
This is a live online ruler in full size with a basic scale in centimeters, which is duplicated by a scale in inches. For the latter, you can set the pitch of the intermediate divisions from 1/8 to 1/32 inches. To calibrate, select one of the items with a known size from the drop-down menu, for example a credit card, and adjust the scale of the ruler to it. You can also use Ginifab on smartphones and tablets.
A simple ruler with a double scale in centimeters and inches, which can be personalized: adjust its color and length. To get accurate data, you first need to calibrate the instrument by attaching a matchbox, a credit card or a banknote to the screen. Lineykasm is supported in both desktop and mobile browsers.
Another minimalistic and precise tool with stylization to match the appearance of a wooden ruler, familiar to everyone since school days. It works on a computer and a smartphone. The scale is double. Calibration is performed automatically depending on the screen resolution, but if it does not work, you can force the desired diagonal.
Like others, this service allows you to find out the size of small objects using a ruler on the screen. To calibrate the scale in centimeters, you need to specify the diagonal of the monitor manually. Additionally, you can find a template here to print the ruler on the printer. The tool works on mobile devices, but not very well — it is better to use it on a PC.
A handy full-size ruler with a contrasting yellow scale color. Shows the size in centimeters or inches. It is calibrated automatically, but for greater accuracy, you can specify the diagonal of the screen yourself or check the scale using a standard credit card.
The mobile online version of the application line for iPhone, which is convenient to use on any smartphones. It has three scales at once: on both edges and in the center of the screen with alternating colors every 5 mm. If the diagonal of the screen is determined incorrectly, it can be adjusted manually.
A fairly simple real-size ruler with a scale in inches and subtle high-resolution risks, which make it much easier to achieve measurement accuracy. The service makes it possible to rotate the tool from a horizontal to a vertical position and back. It is calibrated automatically, but it only works in desktop browsers.
