![]() ![]() Select a comparison item to start calibrating the ruler, My mobile phones (Sony Xperia C5, OPPO R11 Plus) are both 122.6 PPI,Īpple iPhone 5 is 163 PPI, iPhone 7 is 162 PPI, iPhone X is 151.7 PPI. Now i have the most accurate virtual ruler on the web. So i adjust the default pixels per inch(PPI) to 100.7, I found the markings are not very accurate at 30cm, In the office, a A4 size printable paper is a good comparison object,īelow ruler adjuster help us to calibrate accuracy more easily.Īfter i measure the size of virtual ruler by an actual ruler, You can compare to any standard size object at your side,Į.g., coin, credit card, CD, paper money, mobile phone, When you know the width, you can adjust the ruler's PPI setting by it, Then search "the width of your paper money" online,
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