How do I measure card centering from a photo?

Photograph the card square-on, then mark the outer card edges and the inner printed frame on each side. The ratio of the left border to the right border gives left/right centering; top versus bottom gives top/bottom centering. The CardGradeCheck tool does the math automatically as you drag the guides.

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Card Centering Tool

Upload a straight-on photo, drag the red guides to the card's outer edges and the green guides to the printed inner frame. Your PSA / BGS / CGC centering verdict updates live.

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outer card edge inner printed frame drag lines · works on touch

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Tip: shoot square-on in good light, card filling most of the frame. Everything runs locally — your photo never leaves this device.

Live centeringauto

50/50Left / Right

50/50Top / Bottom

Standards checkfront

Standard	Requires	Verdict
BGS 10 Pristine	50/50	—
PSA 10 Gem Mint	≤ 55/45	—
BGS 9.5 Gem Mint	≤ 55/45	—
CGC 10 Gem Mint	≤ 55/45	—
PSA 9 Mint	≤ 60/40	—
PSA 8 NM-Mint	≤ 65/35	—

Centering thresholds are published guidelines; final grades also weigh corners, edges and surface. Back centering allowances are looser (PSA 10 back: 75/25).

Next: is it worth grading? →

How card centering is measured

Centering compares the widths of a card's borders. If the left border is 6mm and the right is 4mm, the card is 60/40 left-to-right. Graders measure both axes and use the worse side against their standard. It's the only grading factor that is pure geometry — which means a photo and this tool measure it as accurately as a grader's loupe.

Centering requirements by grade

PSA 10: ~55/45 or better front, 75/25 back
PSA 9: ~60/40 front, 90/10 back
PSA 8: ~65/35 front
BGS 9.5: ~55/45 · BGS 10 Pristine: ~50/50
CGC 10: ~55/45 · CGC Pristine 10: ~50/50

Centering fails are the cheapest mistake to avoid. A card that measures 62/38 cannot gem — no matter how clean the corners are. Check centering first, then run the worth-grading calculator with realistic PSA 9 odds.

FAQ

What centering is needed for a PSA 10?

Approximately 55/45 or better on the front and 75/25 on the back. Anything worse than 55/45 front makes a Gem Mint 10 extremely unlikely.

Is 60/40 centering bad?

It's the practical ceiling for a PSA 9. Fine for a Mint grade — but it rules out the 10, which is usually where the profit is. Run the numbers before submitting.

Can I measure centering from a phone photo?

Yes, as long as the photo is square-on (not angled) and the card fills most of the frame. Perspective distortion from an angled shot will skew the ratios by a point or two.