Credit Card Size in cm, mm & Inches
Every standard credit, debit, and ID card in the world shares identical dimensions — defined by the international ISO/IEC 7810 ID-1 standard since 1987.
Proportional illustration — not actual size (depends on your screen calibration)
Credit Card Dimensions in All Units
| Unit | Width | Height | Thickness |
|---|---|---|---|
| Millimeters (mm) | 85.60 mm | 53.98 mm | 0.76 mm |
| Centimeters (cm) | 8.560 cm | 5.398 cm | 0.076 cm |
| Inches (in) | 3.370 in | 2.125 in | 0.030 in |
| Pixels @ 96 PPI | 323 px | 204 px | — |
Credit Card vs Other Common Cards
| Card Type | Standard | Width (mm) | Height (mm) | Note |
|---|---|---|---|---|
| Credit / Debit Card | ISO/IEC 7810 ID-1 | 85.60 | 53.98 | Visa, Mastercard, Amex, all banks |
| National ID Card | ISO/IEC 7810 ID-1 | 85.60 | 53.98 | Same standard as credit card |
| US Business Card | US Standard | 88.90 | 50.80 | Slightly wider, slightly shorter |
| EU Business Card | ISO 216 | 85.00 | 55.00 | Nearly identical to credit card |
| Standard SIM Card | ETSI TS 102 221 | 25.00 | 15.00 | About ¼ the width of a credit card |
Why the Credit Card Size Is Useful to Know
Frequently Asked Questions
Are all credit cards exactly the same size?
Yes. Every Visa, Mastercard, American Express, Discover, and bank debit card must conform to ISO/IEC 7810 ID-1: 85.60 mm × 53.98 mm × 0.76 mm. This standard has been in place since 1987 and applies worldwide.
Is a credit card the same size as an ID card?
Yes — national ID cards, driver's licenses, and credit cards all use the ISO/IEC 7810 ID-1 standard. Width: 85.60 mm, Height: 53.98 mm. This is why credit card calibration works so accurately on our ruler.
How do I use a credit card to calibrate my screen ruler?
On Accurate Ruler, click the calibration icon in the toolbar, select "Credit card", then place your physical credit card flat against your screen and drag the on-screen guide until it matches the card's edge. The tool calculates your exact screen PPI and saves it for future visits.
Why is knowing the exact credit card size useful?
Designers use it to size card templates for printing. Developers use it to calibrate screen rulers. Crafters use it to cut card-shaped slots and holders. It's also the most reliable real-world object to calibrate any measuring tool because every card is identical.
How thick is a credit card in mm?
Standard credit cards are 0.76 mm thick (about 0.030 inches or 30 thousandths of an inch). Some premium metal cards are thicker — typically 0.80 mm to 0.84 mm.
What is the credit card size in pixels?
It depends on your screen's PPI. At the web standard of 96 PPI, a credit card is 323 × 204 pixels. On a modern Retina display at 220 PPI, the same card would be 740 × 467 pixels. Use our PPI calculator to find your exact screen PPI.
Need to measure something else?