Online Ruler - Inches
Download 12″ free printable paper ruler
This online ruler that can be printed in actual size, measurements are in cm and inches, the top half is a centimeter and the bottom half is an inch ruler. To accurately measure the length of an object, we recommend setting the zoom in your browser to 100%.
Printable Ruler
Pixel Ruler & Guides
Measure width in Pixels
How does Online Ruler work?
Onlinerulerfree.com tries to detect the screen size and then displays the ruler at its actual size. We use machine learning to recognize your device, so every time you set the right size, you make the rule smarter. But how can you verify the ruler is correct? You can check if the screen ruler is the actual size by measuring a "standard" bank note. For example, a US dollar bill should be exactly 2.61 inches wide, you can now compare that to our online ruler size and your screen size.
Household items you can measure with.
Credit Card: 3.375 inches by 2.125 inches.
Money: 6.14 inches by 2.61 inches.
Penny: 0.750 inch in diameter.
Nickel: 0.835 inch in diameter.
Quarter: 0.955 inch in diameter (almost exactly 1 inch).