Free Card Centering Tool
Upload a photo of your card — our model straightens it and finds the borders, you fine-tune the guides, and it measures the centering and the grade ceiling at PSA, BGS, CGC and TAG. Free, before you pay to submit.
Card Centering Checker
Upload a photo — our model finds the card edge and art frame, you fine-tune, it measures. Free.
Free tool by Midpoint — your photo is measured on our server by our own model and not stored.
No photo handy? Use the visual calculator instead
Card Centering Calculator
Match the card to yours — get the centering and an estimated grade
the green area is the printed image
Centering is one of four factors graders score (with corners, edges, surface). This estimates the front-centering ceiling only.
More accurate in the Midpoint app
The app checks your photo, measures the front and back, and grades corners, edges and surface — plus what the card is worth raw and graded. Your first grades are free.
What you get in the app
The full measurement, not just the ratio.
Centering in millimetres, predicted PSA, BGS, CGC and TAG grades, and an AI surface analysis of corners, edges, print and holo, with a verdict on whether it is worth grading. Drag the handles on this sample card, just like in the app.
Blaine's Arcanine
Gym Heroes
Drag the edge handles · rotate · zoom · pan when zoomed
psa
10
bgs
9.5
cgc
10
tag
10
Left / Right
48/52
L 1.83mm · R 1.95mm
Top / Bottom
58/42
T 2.55mm · B 1.85mm
AI surface analysis
Edges
Sharp on all four sides — no whitening visible.
Corners
All four corners are crisp and squared.
Color registration is dead-on; no print line shift.
Holo
Faint planking from age — common on Gym-era holos.
Verdict
Strong gem-mint candidate. Worth grading.
Add this free tool to your website
Embed the centering checker on your blog, store, or collector site. It is free, runs entirely in the visitor's browser, and works anywhere. Just copy this snippet and paste it into your page:
<iframe src="https://www.cardcenteringtool.com/widget/centering-checker" width="100%" height="760" style="border:none;max-width:600px" loading="lazy" title="Free Card Centering Checker"></iframe>
<p style="font:13px sans-serif">Free <a href="https://www.cardcenteringtool.com">card centering tool</a> by Midpoint</p>Tip: it drops straight into WordPress, Webflow, Squarespace, or any HTML page.
What is card centering?
Centering measures how evenly the image sits within the card's borders. Graders express it as two ratios — left/right and top/bottom — where 50/50 is perfect. A card printed slightly off-center might be 60/40, meaning one border is 60% of the combined width and the other 40%. Centering is one of the four factors that decide a card's grade, alongside corners, edges, and surface.
How to check centering from a photo
Shoot the card straight-on against a plain, contrasting background, with the card filling most of the frame. Our card-detection model finds the card edge (blue guides) and the printed art frame (yellow guides); drag any guide to match your card exactly. The left/right and top/bottom ratios update live, along with the best grade each company's front-centering tolerance would allow. Your photo is measured on our server by our own model and is not stored; the model places the guides for your first 3 photos each day, after that the tool uses basic in-browser guides.
PSA centering tolerances
These are PSA's published centering limits. A card must meet the front tolerance to reach each grade:
| Grade | Front (max) | Back (max) |
|---|---|---|
| PSA 10 — Gem Mint | 55/45 | 75/25 |
| PSA 9 — Mint | 60/40 | 90/10 |
| PSA 8 — NM-MT | 65/35 | 90/10 |
| PSA 7 — Near Mint | 70/30 | 90/10 |
| PSA 6 — EX-MT | 80/20 | 90/10 |
BGS, CGC and TAG use tighter or slightly different tolerances — the checker above shows all four side by side, and the full charts live in our grading standards section.
How accurate is this estimate?
This free tool does not use AI — it auto-suggests the guide lines with simple image analysis and you do the aiming, so the result is only as precise as your placement. It estimates the front-centering ceiling: the best grade your centering would allow. Your final grade can still come in lower if corners, edges, or surface have issues, and graders measure to fractions of a millimeter. Use it to screen cards before you spend on grading. For much more advanced centering — the AI places the guides for you with far better precision (still fine-tunable) — plus predicted grades, full surface analysis, and market pricing, log in to Midpoint on the web or in the app.