Card Centering Calculator
Measure your card's borders and instantly see if it meets PSA 10, BGS 10, or CGC 10 centering standards. Know before you submit.
Measure Your Card Borders
Measure the border width on each side of your card using a ruler or centering tool. Enter the measurements below.
Enter border measurements in mm. Use a ruler, centering tool, or eyeball estimate.
Quick Reference: Centering Standards
PSA
BGS
CGC
Frequently Asked Questions
What centering ratio does PSA require for a 10?▼
PSA requires 60/40 or better centering (both left-right AND top-bottom) for a PSA 10 Gem Mint grade. For a PSA 9 Mint, the threshold is 65/35. Cards with 70/30 or worse centering are typically limited to PSA 8 or below.
How does BGS grade centering differently from PSA?▼
BGS (Beckett Grading Services) uses a sub-grade system. Centering is one of four sub-grades (centering, corners, edges, surface). A BGS centering sub-grade of 10 requires 50/50 to 55/45. A sub-grade of 9.5 allows up to 60/40. The centering sub-grade directly impacts the overall BGS grade.
How do I measure my card centering?▼
Measure the border on each side of the card (left, right, top, bottom) using a ruler or centering tool. The centering ratio is calculated as the smaller border divided by the larger border on each axis. For example, if the left border is 2mm and right is 3mm, the left-right centering is approximately 60/40.
Does centering matter more for modern or vintage cards?▼
Centering matters significantly for modern cards where PSA 10 or BGS 10 commands a huge premium. Vintage cards (pre-1980) are graded more leniently on centering since manufacturing standards were lower. A vintage card with 65/35 centering can still receive high grades.
What is the most common centering issue?▼
Top-bottom miscentering is more common than left-right due to how card sheets are cut during manufacturing. Many cards that look centered left-right are actually off-center top-bottom. Always check both axes before submitting for grading.
Related Tools
Centering estimates are based on published grading company standards. Actual grades may vary.