Card Centering Studio
Upload front + back photos, drag the border markers, and see your centering ratio calculated in real time. Color-coded PSA-grade thresholds, photo filters, gyro leveling, and side-by-side export — all in your browser.
Centering measurement
Measure your card
Upload a photo of your card, then drag the cyan lines to mark the physical card edges and the gold lines to mark the inner border where the art or text box meets the border. The tool calculates ratios from the gap distances in real time.
Upload the front of your card
Drag and drop, click to select, or use your camera. JPG, PNG, or WebP.
Your image stays in your browser and is never uploaded to any server.
How to use
Step-by-step guide
Upload your card photo
Drag and drop or click to upload. Use a straight-on photo with the full card visible, including all four borders. Avoid shadows and angles.
Set the card edge lines
Drag the four cyan lines to precisely align with the physical edges of the card. These define the outer boundary.
Set the inner border lines
Drag the four gold lines to where the printed border meets the inner content area (art box, text box, or holo frame).
Read your results
The sidebar updates in real time as you drag. It shows the left/right and top/bottom ratios, an overall centering score, and whether your centering passes PSA, BGS, and CGC thresholds.
Impact on grades
How centering affects your grade
Centering accounts for 20% of the overall MasterGrade score. At PSA, centering alone can cap a card's grade — even a card with flawless surface, corners, and edges will be limited if centering exceeds tolerance. Understanding the ratio thresholds helps you set realistic expectations before submitting.
Grading company standards
Centering tolerances by grading service
| Service | Gem Mint (10) | Mint (9) | NM-MT (8) |
|---|---|---|---|
| PSA | 55/45 or better | 60/40 or better | 65/35 or better |
| BGS | 50/50 to ~52/48 | 55/45 or better | 60/40 or better |
| CGC | 55/45 or better | 60/40 or better | 65/35 or better |
Note: BGS is generally stricter on centering than PSA or CGC. These are approximate tolerances based on publicly documented standards and community observations.
Want a full AI grade?
This tool lets you manually measure centering. For an automated AI scan that also grades corners, edges, and surface, upload your card for a full MasterGrade report. Your first scan is free every day.
Grade a card now