20 centimeters Ruler — Actual Size
Use this ruler to visualize and measure exactly 20 centimeters on your screen. After calibrating with a credit card or reference object, the ruler above displays 20 cm at its true physical size on any device — phone, tablet, or desktop.
Unit Conversions for 20 centimeters
20.00
centimeters
200.0
millimeters
7.87
inches
How to Measure 20 centimeters
- Open this page on the device you want to measure with and use the ruler displayed above.
- Calibrate by placing a credit card on the screen and adjusting the slider until the outline matches the card. This takes about 10 seconds.
- Place the object you want to measure against the ruler. The markings show centimeters, millimeters, and inches, so you can read 20 cm directly.
- Your calibration is saved in the browser, so the ruler remains accurate on your next visit.
About This Measurement
20 centimeters equals 200.0 millimeters or 7.87 inches. One centimeter is one-hundredth of a meter, or about 0.394 inches. The centimeter is part of the metric system used by most countries worldwide.