0.00in
Status: Auto-detecting...
Frequently Asked Questions
Q: How does Online Ruler work?
A: inchRulers.com tries to detect the size of your screen and then shows the ruler in actual size. We use machine learning to identify your device.
Q: How can I be sure the ruler is correct?
A: You can ensure the accuracy by measuring a standard object like a credit card, or banknote (A 100 dollar bill is 2.61 inches wide).
Q: How to measure length in centimeters?
A: Switch to Centimeters mode. Numbers correspond to centimeters. Smaller unnumbered marks are millimeters.
Q: How to measure length in inches?
A: Switch to Inches mode. Numbers correspond to inches. Inches are part of the Imperial System.
Q: How to use my phone as a ruler?
A: Simply open inchRulers.com on your phone. Our responsive design adapts to your screen's PPI.
Q: How to measure waist circumference online?
A: Use a string to measure your waist, then measure the string with this online ruler.