Guides and tools
Practical guides and free browser tools. Nothing to install.
Guides and tools
- Card centering standards: PSA, BGS and CGC by gradePSA 10 needs about 55/45 front and 75/25 back centering. Full PSA, BGS and CGC centering tables by grade, what 55/45 means in mm, and how to measure it.
- How to measure card centering on iPhoneA practical CenterMint workflow: capture a clear photo, check outer and inner borders, fine-tune with the focus loupe, and save your measurements.
- How to find the inner border on a full-art cardSeparate the physical card edge from an inner reference line. Learn when full-art card centering can be measured and when a result would be a guess.
- Is this card worth grading? Work out the break-even firstFree calculator: compare selling raw with PSA 9 or 10 after grading and marketplace fees, find the break-even price and when centering rules a grade out.
- How to check corners and edges before you grade a cardPre-grading check for whitening, soft corners, chipped edges and surface marks: the light, the loupe, what to look for, and what a phone photo can’t show.
- Card centering calculatorCalculate left/right and top/bottom card centering from measured border widths. Free browser tool with a directional preview.