Whether you are calibrating an on-screen measuring tool, designing a wallet or cardholder, or checking print templates, knowing the exact dimensions of a standard credit card is essential.
Official ISO/IEC 7810 ID-1 Dimensions
The International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC) established the ISO/IEC 7810 standard to ensure payment cards, driver's licenses, and identification badges work seamlessly in ATMs and POS terminals across the globe.
Comprehensive Conversion Table (MM, CM, Inches)
| Dimension Property | Millimeters (mm) | Centimeters (cm) | Decimal Inches | Fractional Inches |
|---|---|---|---|---|
| Width (Length) | 85.60 mm | 8.56 cm | 3.370″ | 3 3/8″ |
| Height (Width) | 53.98 mm | 5.398 cm | 2.125″ | 2 1/8″ |
| Thickness | 0.76 mm | 0.076 cm | 0.030″ | ~1/32″ |
| Corner Radius | 3.18 mm | 0.318 cm | 0.125″ | 1/8″ |
How to Calibrate an Online Ruler Using a Card
Because this dimension is constant worldwide, our website uses it as the ultimate physical ground-truth reference:
- Open the Screen Calibration Tool.
- Place any standard credit or debit card against your screen.
- Adjust the slider until the on-screen card matches your real card.
- Your online ruler is now calibrated to within 0.1 mm accuracy!
