Card Centering Calculator
Card Centering Calculator
Measure how well a card is centered — the left/right and top/bottom border ratios that grading companies weigh heavily. Upload a scan and drag the guide lines onto the card's edges and the printed design, or type in measurements by hand. Everything happens in your browser; no image is uploaded to a server. Looking up a card's dimensions instead? See the Trading Card Size Guide.
Upload a card scan or photo
Click to choose a file, or drag & drop it here
Stays in your browser — nothing is sent anywhere.
Skewed photo? Use Rotate to straighten the card first. Then drag the navy lines to the four edges of the card, and the coral lines to the edge of the printed design. The shaded bands are the borders being measured. Zoom in (pinch, scroll, or the +/− buttons) for precise placement — a magnifier shows the pixels under the line you’re dragging, and arrow keys nudge a selected line.
Enter your measurements
Measure each of the four borders — the white margin between the card's edge and the printed design. Use any unit (mm, 1/100″, pixels); only the ratio matters.
Tip: scan at 600+ DPI and measure in an image editor for the most accurate read.
Centering tolerances by grade (PSA, SGC, BGS)
| Grade | PSA front | PSA back | SGC | BGS front |
|---|---|---|---|---|
| Pristine / 10+ | — | — | 50/50 (100) | 50/50–55/45 |
| Gem-Mint 10 | 55/45 | 75/25 | 55/45 (98) | 55/45 (9.5) |
| Mint 9 | 60/40 | 90/10 | 60/40 (96) | 60/40 |
| NM-MT 8 | 65/35 | 90/10 | — | 65/35 (8.5) / 70/30 (8) |
| NM 7 | 70/30 | 90/10 | — | — |
PSA tightened its Gem-Mint 10 front standard from 60/40 to 55/45 in early 2025; older guides may still show 60/40. SGC applies the same tolerance to the front and the back. BGS centering shown is the front sub-grade; BGS is more lenient on the back. These are centering tolerances only — a grade also depends on corners, edges and surface.
About this estimate. The result is only as accurate as where you place the guides (or the measurements you enter), and assumes the card is square-on — use the rotate control to straighten a skewed photo first. Centering is one of four factors graders weigh — corners, edges and surface matter too — so meeting a centering tolerance does not guarantee that grade. This tool is an independent aid and is not affiliated with, endorsed by, or operated by PSA, SGC, BGS/Beckett or any grading company. It reports measurements and published tolerances; it is not a price or value guide.