Guides
How grading works, what a grader looks for and what our data says, so you only pay to grade the cards that can hit a 10.
Latest guides
- One Piece Card Grading: What 312 One Piece Cards Scored, Set by Set One Piece TCG grading data from 312 cards pre-graded with AI: average score, share of perfect 10s by set, how they compare with Pokémon, and what to check before you pay to grade.
- How to Value Trading Cards: Raw vs Graded Prices and When Grading Pays How to work out what a Pokémon, Magic, One Piece or sports card is worth: sold versus asking prices, raw versus graded value, the data sources to trust, and a simple test for whether grading pays.
- Is AI Card Grading Accurate? What It Measures, What It Misses Is AI card grading accurate? What AI pre-grading measures precisely, what photos can hide, why honest tools show a confidence range instead of a match rate, and how to get the most reliable result.
- The 1-10 Card Grading Scale Explained: Gem Mint to Poor The card grading scale explained simply, from Gem Mint 10 down to Poor 1. Learn what each grade means and pre-check your cards before you submit.
- Card Condition Explained: Centering, Corners, Edges and Surface Learn the four card condition grading factors—centering, corners, edges, and surface—and how each affects your grade. Pre-screen smarter today.
- How to Photograph Trading Cards for Accurate Grading Learn how to photograph cards for grading with sharp, glare-free shots an AI grader can read. Follow our step-by-step guide and pre-screen today.
- AI Card Grading Explained: What AI Pre-Grading Can and Can't Tell You What AI card grading (pre-grading) is, how it measures centering, corners, edges and surface from photos, how it compares with PSA, BGS or CGC grading, and when a card is worth submitting.
- Sports Card Grading with AI: Pre-Screen Rookies, Chrome and Vintage Before You Submit How AI pre-grading checks football, basketball, baseball, hockey and soccer cards, what 3,524 sports cards scored (pre-1990 average 5.89, 2010 onwards 9.06), and which cards are worth grading.
- How to Tell if a Trading Card Is Fake: Checks You Can Do and Where AI Helps How to spot fake Pokémon, Magic, Yu-Gi-Oh! and One Piece cards: the light test, print pattern, font, back and edges, what AI fake card detectors can and can't do, and what to do if you suspect a counterfeit.
- Best AI Card Scanners in 2026: Top Tools Compared and How to Choose AI card graders and scanners compared side by side: platforms, games, free tier, price and published accuracy claims for TCGrader, CardGrade.io, PreGradeCards, CardGrader.AI and more, checked October 2026.
- Pokémon AI Grader: How to Pre-Screen Your Cards for a 10 How a Pokémon AI grader checks centering, corners, edges and holo surfaces from photos, what Pokémon cards score in real data (vintage 6.42, modern 8.79), and which cards are worth submitting.
Reference and data
The grading basics and what thousands of AI-graded cards reveal.
- Card Grading Glossary: Key Terms Explained Confused by grading terms? Our glossary explains centering, whitening, subgrades, slabs and more in plain language. Pre-grade your cards free with TCGAI.PRO.
- How the TCGAI Score works: our methodology How TCGAI.PRO turns two card photos into a TCGAI Score: photo checks, centering measured in pixels, AI defect detection, deterministic grading rules, price sources and known limits.
- Pokémon Card Grading Data 2026: What 2,550 AI-Graded Cards Reveal Pokémon grading data from 2,550 cards: average TCGAI Score 8.23, 16.7% perfect 10s. Cards from 1999 to 2002 average 6.42 against 8.79 for 2023 to 2026. Results by era, language and set.
- The Card Grading Trap Index 2026: Sets Where Almost No Card Scores a 10 Data from 7,270 graded cards: the sets where almost no card scores a perfect 10 (Pokémon Base Set, Topps Baseball: 0%) and the sets where many do. Updated October 2026.
- The State of Pre-Grading 2026: What 7,270 AI-Graded Cards Reveal Data from 7,270 cards graded by TCGAI.PRO between December 2025 and October 2026: score distribution, how often cards reach a 10, results by game and set, and the sub-grades that cost the most.
- Trading Card Grading Explained: Professional Grading vs AI Pre-Grading Learn how trading card grading works, the 1-10 scale, costs and turnaround, and how AI pre-grading screens cards first. Try a free AI grade now.