my Asus laptop is 100.7 PPI, Apple MacBook Air is 127.7 PPI, Xiaomi Mi Pad 3 is 163 PPI, my mobile phones (Sony Xperia C5, OPPO R11 Plus) are both 122.6 PPI, Apple iPhone 5 is 163 PPI, iPhone 7 is 162 PPI, iPhone X is 151.7 PPI. The most accurate way, after i measure the size of virtual ruler by an actual ruler, i found the markings are not very accurate at 30cm, so i adjust the default pixels per inch(PPI) to 100.7, now i have the most accurate virtual ruler on the web.Below ruler adjuster help us to calibrate accuracy more easily. Use standard objects to compare lengths, check your wallet, use any paper money to be our compare object, then search "the width of your paper money" online, when you know the width, you can adjust the ruler's PPI setting by it, you can compare to any standard size object at your side, e.g., coin, credit card, CD, paper money, mobile phone, in the office, a A4 size printable paper is a good comparison object, the longer the more accurate.scale with metric units, centimeters(cm), meters(m) and kilometers(km). Search "display by pixel density" online, check if there has your device's brand and model, i am lucky and found my screen has 100 PPI. This is an online scale ruler that could be calibrated to actual size and the scale ratio is variable that could be set by yourself, you can set the scale ratio according to your needs, eg.The screen resolution of your current device is 1366x768 pixels. Place your device on the surface you want to measure and follow the on-screen instructions to obtain precise measurements instantly.To have the most accurate ruler online, just set the pixels per inch(PPI), below are some ways to know the pixels per inch to your device.How to use this online ruler For the ruler to display correctly (i.e., in proportion to the actual physical size), it must be calibrated. Open the app and select the measurement unit you wish to use. 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. ![]() Download and install the Online Ruler app from your device’s app store.Keep a record of your previous measurements for quick access and tracking of ongoing projects. If the size scale is 1:64, you should enter the 64 in the box. To manually process the calculation, choose Other for the scale enter the scale fraction of your choice directly in the scale fraction box. When you’re faced with figuring out how to convert a two-inch line. Plans are often drawn at 3/4, 3/16, 1/8, and other scales (in each case the dimension in inches here corresponds to one foot). We also offer a 3D measurement mode for projects that require depth and height. The scale fraction will show in the scale fraction box after clicking on Calculate. Architectural plans are drawn to all different scales, ranging from the simple (1 inch 1 foot) to the complex (3/16 inch 1 foot). The cutout also had a clock, in the shape of a heart, where the man's. Our app isn’t limited to two-dimensional measurements. ruler, and at its base was an outlined area for a bathroom scale (figure 4.1). ![]() Additionally, you can change the ruler’s orientation to suit your needs. Scale usually refers to the adjustment of size, which is either the reduction or magnification of real-life objects while maintaining their proportions. We allow you to choose from different units of measurement, such as inches, centimeters, millimeters, and more. Our app caters to your preferred platform! ➡️ 4. Online Ruler is available both on the App Store for iOS devices and on Google Play for Android devices.
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