Card Centering Calculator App

The fastest, most accurate card centering calculator for grading prep.

Stop guessing whether your cards will hit that gem mint grade. Card Centering Calculator measures left-to-right and top-to-bottom centering instantly, then predicts your potential grade for PSA, BGS, CGC, SGC, and TAG — so you only submit the cards worth submitting.

Built for collectors who are tired of paying grading fees on off-center cards.

AI AUTO-DETECTION (our edge)
Just point your camera or pick a photo — our on-device AI finds your card's borders automatically and calculates exact centering ratios in a single tap. No fiddly manual setup. Want pixel-perfect control? Drag the guide lines, or rotate, tilt and zoom the image to line it up against fixed reference lines.

INSTANT MULTI-GRADER PREDICTIONS
See how your centering scores across every major standard at once:
• PSA (Gem Mint 10)
• BGS / Beckett (Black Label & 9.5)
• SGC (Gold 10 / Pristine)
• CGC (Pristine & Gem Mint)
• TAG (strictest centering tier)

Know your card's grading potential before you spend a cent on submission fees.

FRONT & BACK ANALYSIS
Grade both sides. Many companies weight the reverse differently — Card Centering Calculator handles front and back so your estimate matches what graders actually do.

ORGANIZE YOUR COLLECTION
Save every analyzed card and sort it into your own custom collections — add a card to as many as you like. Build submission lists, revisit past scans, and edit centering any time.

MADE FOR EVERY COLLECTOR
Perfect for Pokemon cards, sports cards (baseball, basketball, football), Magic: The Gathering, Yu-Gi-Oh!, and any trading card. If centering matters to the grade, this tool helps.

WHY COLLECTORS CHOOSE IT
• AI border detection — not just manual guesswork
• Estimates for 5 grading companies in one place
• Works front and back
• Camera or gallery import
• On-device analysis — your photos stay on your phone
• Light & dark themes
• Clean, fast, collector-friendly design

Centering can make or break a grade no matter how clean the corners and surface are. A few millimeters of border skew can drop a PSA 10 to a 9 — and cost you real money in value. Card Centering Calculator helps you spot the keepers and skip the cards that won't grade well, potentially saving hundreds in wasted submission fees.

Whether you're prepping for PSA grading, BGS grading, CGC grading, SGC grading, or TAG grading, accurate centering measurement is the difference between gem mint and "almost." Measure with confidence.

Download Card Centering Calculator and take the guesswork out of card grading prep.

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Card Centering Calculator is an independent tool and is not affiliated with, endorsed by, or sponsored by PSA, Beckett (BGS), CGC, SGC, TAG, or any trading card manufacturer. All grade estimates are predictions based on centering only and are not guarantees.

Privacy Policy: https://sites.google.com/view/allegrodigital/privacy-policy
Terms of Use: https://sites.google.com/view/allegrodigital/terms-of-use

Recent changes:
• AI auto-detection of card borders
• Instant left/right & top/bottom centering
• Grade estimates for PSA, BGS, SGC, CGC & TAG
• Front & back analysis
• Save cards & sort them into your own collections
• Light & dark themes