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Measure your card's borders to calculate centering ratios and see which grades your card qualifies for at PSA, BGS, and CGC.
Know your centering before paying $20-150+ for professional grading.
See exactly which grades your card qualifies for at PSA, BGS, and CGC.
Interactive visualization makes it easy to understand your measurements.
Enter measurements and click Calculate to see results
Official centering requirements for top grades at each company
| Grade | Front | Back | Notes |
|---|---|---|---|
| PSA 10 | 60/40 | 75/25 | Gem Mint |
| PSA 10P | 55/45 | 70/30 | Pristine (stricter) |
| PSA 9 | 65/35 | 90/10 | Mint |
| BGS 10 | 55/45 | 55/45 | Pristine |
| BGS 9.5 | 60/40 | 60/40 | Gem Mint |
| CGC 10 | 55/45 | 60/40 | Perfect |
| CGC 9.5 | 60/40 | 65/35 | Gem Mint |
Follow these tips to ensure your photos produce accurate centering measurements.
CGI Vision AI measures centering automatically from your photos with sub-millimeter precision.
Centering refers to how evenly the card's image is positioned within its borders. Perfect centering would be 50/50 on both left/right and top/bottom, but this is rare in practice.
A centering ratio like "60/40" means one border is 60% of the combined border width while the opposite border is 40%. The closer to 50/50, the better the centering.
Use a ruler or digital caliper to measure the width of each border. Millimeters provide the most precision for standard trading cards. Measure at multiple points along each edge and use the average for best results.
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