1 Euro Coin Size & Dimensions
The 1 Euro Coin is one of the most reliable reference objects for calibrating a screen ruler. With a standard diameter of 23.25mm (2.3cm / 0.92 inches), it provides a consistent size that you can use to calibrate your screen for accurate measurements.
1 Euro Coin Exact Dimensions
Millimeters
23.25 mm diameter
Centimeters
2.3 cm diameter
Inches
0.92" diameter
1 Euro coin
How to Calibrate with a 1 Euro Coin
- Open the screen ruler on your device and select 1 Euro Coin from the calibration panel.
- Place your 1 euro coin flat on the screen, aligning it with the on-screen outline.
- Adjust the calibration slider until the outline matches your 1 euro coin exactly.
- The calibration is saved automatically. You can now measure any object with the ruler and get accurate readings in centimeters, millimeters, and inches.
Why Use a 1 Euro Coin for Calibration?
Calibration is essential because every screen has a different pixel density (PPI). A pixel on a 6-inch phone screen is physically much smaller than a pixel on a 27-inch desktop monitor. By placing a known-size object on the screen, the ruler can calculate the exact physical size of each pixel and convert measurements accurately.
Coins like the 1 Euro Coin are particularly useful because they are standardized, widely available, and easy to position on a screen. Their circular shape makes alignment straightforward.