The first thing you notice on a trading card is whether the print sits off to one side. Measure the four border widths in inches (or millimeters), and this page gives the left-right and top-bottom splits, how far apart the opposing sides are, and which direction is furthest off center.
The arithmetic is plain. One border divided by the sum of its pair gives a percentage, and subtracting the pair gives the gap. The direction off center is taken only from how far each split sits from 50%, and when the two are equally far the left-right pair is reported first. Measured gaps are shown to three decimals in inches (two in millimeters) and splits to one decimal, and the verdict uses the splits alone. Current as of October 2026.
This page does not assign a grade or a value; it reports measurements only. Grading services do publish centering standards: PSA's published standards put a PSA 10 at about 55/45 on the front and 75/25 on the back, and a PSA 9 at about 60/40 on the front and 90/10 on the back. You can compare your split against those figures, but standards can change and the grade also depends on corners, edges and surface, so confirm the current numbers with the grading service. Because the split changes with where you measure, take all four readings the same way, from the outer edge of the card to the edge of the printed image area.
Frequently Asked Questions
Grading services publish their own centering standards. PSA's published grading standards, for example, put a PSA 10 at about 55/45 or better on the front and 75/25 on the back, and a PSA 9 at about 60/40 on the front and 90/10 on the back. Standards can change and the final grade also weighs corners, edges and surface, so check the grading service's official site for the current figures.
Measure from the outer edge of the card to the edge of the printed image area, the same way on all four sides. Changing where you measure changes the split, so keep one consistent reference.
Only the split shown on screen. The page measures how far each split sits from 50% and reports whichever is further, showing the left-right pair first when the two are equal. When both splits read 50.0%, it says so.