Official-reference centering guide
PSA centering standards are a reference point, not a final grade. Use this manual calculator to estimate front or back centering, then remember that final grades depend on the whole card.
PSA reference only. Estimate only. Not affiliated with PSA or any grading company.
Centering checker
Step 1: upload a card photo. Step 2: crop tightly to the outer card edges. Step 3: drag the four inner-border lines to the printed border.
Crop tightly to the outer card edges. A tilted or poorly cropped photo can make the centering estimate less accurate.
Drag the left, right, top, and bottom guide lines to the printed border or inner frame.
Photo guide
A clean, straight photo makes manual centering easier. The outer card edges and printed border should both be visible.
For the most accurate result, avoid anything that hides the true card edge.
PSA reference
PSA 10 reference: approximately 55/45 or better on the front, and 75/25 or better on the reverse. Centering is only one part of grading.
This tool is an estimate only. Final grades depend on the grading company and overall card condition. This site is not affiliated with PSA, BGS, CGC, SGC, or TAG.
Official reference: PSA Grading Standards.
Privacy
The image is processed in your browser. We do not need your card photo to measure centering. No signup is required.
FAQ
PSA's public Gem Mint 10 standard references image centering within a tolerance not to exceed approximately 55/45 on the front and 75/25 on the reverse. This tool only estimates centering and does not predict a final PSA grade.
No. Centering is only one part of grading. A card can have strong centering and still receive a lower grade because of other condition issues.
Yes. Upload a back photo, crop to the card edges, and drag the lines to the back design or border you want to measure.
The centering reference is based on PSA's public grading standards. This site is independent and not affiliated with PSA.
No. The calculator is free to use in your browser, and no signup is required for the MVP.
No. The card photo is processed locally in your browser for the measurement workflow. Your image stays in your browser.
No. It only estimates centering from manual guide lines. It does not predict a PSA grade, and it does not inspect corners, edges, surface, print defects, or eye appeal.
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