Scan any sports or trading card and MintySlab’s computer-vision engine measures the centering and estimates a grade — before you ever pay for submission.
Built for collectors, flippers, and breakers who want to know what they’re holding.
Scan the card you want to grade and our computer-vision algorithms calculate the centering and return an estimated grade on the spot.
Don’t submit blind. Measuring centering before you send cards to a grading service can save you submission fees on cards that won’t hit the grade.
Upload card images straight from your camera roll, ditch the ads, and scan eBay listings to check centering before you buy.
Place your card on a contrasting matte background and point your camera. MintySlab detects the borders automatically.
The engine calculates left/right and top/bottom ratios and shows the exact percentages — adjust manually anytime.
See an estimated grade based on centering so you know before you submit or buy.
MintySlab reports the same left/right and top/bottom ratios grading companies evaluate, so you can compare against published thresholds like 60/40 and 55/45.
Everything you need to know about how centering is measured and why it matters for your grade.
Read → PSA 9 vs 10The difference between a PSA 9 and a PSA 10 often comes down to fractions of a millimeter. Here’s how to spot it.
Read → RequirementsWhat it really takes to earn a Gem Mint grade — and the centering tolerances you need to hit.
Read → Pre-submissionPractical steps to maximize your grading score before you submit your cards.
Read → CalculatorHow to calculate 60/40 vs 55/45 centering and what those ratios mean for your card.
Read → SupportAnswers to the most common questions about MintySlab and MintySlab+.
Read →Download MintySlab on the App Store and start checking centering today.
