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01Upload a clear photo

Step 1 of 4: Upload a clear photo

Lay the card flat on a dark, matte background. Shoot straight down with even light. A flatbed scan is most accurate. Then upload or tap Choose image.

4-Step Workflow

Free Card Centering Tool & PSA 10 Analyzer

Most cards stuck at 8 or 9 fail on centering, not corners. PSA 10 needs 55/45 front, 75/25 back. Upload, align guides, read L/R and T/B for PSA, BGS, SGC, or CGC. Slab mode flags regrade upside. Runs locally. Nothing uploads.

4-Step Workflow04 steps

How to use the Appaw Centering Analyzer

Step 1 of 4: Upload a clear photo

  1. 01
    Step 1

    Upload a clear photo

    Lay the card flat on a dark, matte background. Shoot straight down with even light. A flatbed scan is most accurate. Then upload or tap Choose image.

  2. 02
    Step 2

    Straighten the photo

    Phone angles skew margins. Open Adjust image (sliders icon, bottom-right). Set zoom and H/V tilt until the card edges match the frame, not the slab plastic. Tap Fit to view if the image looks small.

  3. 03
    Step 3

    Align edge and border guides

    Drag blue lines to the outer cut edge. Drag pink lines to the inner art border on all four sides. Move every handle once. Corner loupes help on tight margins.

  4. 04
    Step 4

    Read your centering percentage

    The analyzer prints left/right and top/bottom ratios and a grade zone for PSA, BGS, SGC, or CGC. Switch the grading standard in the header.

PSA SpecReference

What are the centering requirements for a PSA 10?

Centering is how evenly the printed border sits inside the cut edges, measured as left/right and top/bottom ratios. Closer to 50/50 is better. PSA tightened the Gem Mint 10 front standard to 55/45 in 2025. The table lists published front and back tolerances for common grades.

GradeMax front centeringMax back centering
PSA 10 (Gem Mint)55/4575/25
PSA 9 (Mint)60/4090/10
PSA 8 (NM–MT)65/3590/10
BGS 10 Black Label50/5050/50
BGS 10 Gold Label55/4555/45
BGS 9.5 (Gem Mint)60/4060/40
SGC 10 (Gem Mint)55/4570/30
CGC 10 (Pristine)55/4575/25

Tolerances follow PSA, Beckett (BGS), and SGC published guidelines and may change. Corners, edges, and surface still count. Centering alone does not guarantee a grade.

PSA 10 centering requirements explained

Slab PhotoWorkflow

How to measure centering on a graded slab photo

Slab plastic adds glare and skew. Use Adjust image and corner loupes so guides sit on the card inside the holder, not the outer case edge.

  1. 01

    Photograph straight-on

    Lay the slab flat on a dark surface. Shoot from directly above with even light. Capture the full card face. Avoid flash hotspots on the label.

  2. 02

    Open Adjust image

    Correct keystone with zoom, rotate, and H/V tilt. The mini plot shows blue edge and pink border alignment.

  3. 03

    Match corner curves

    Enable corner magnifiers. Drag the fillet arc so quarter guides follow the card corners inside the slab. Useful on rounded vintage stock.

  4. 04

    Align guides on the card face

    Blue guides on the cut edge. Pink guides on the inner art border. Toggle Edge, Border, or Both to focus one layer.

  5. 05

    Read the slab verdict

    Set photo type to Graded slab. The screening line estimates regrade upside vs downgrade risk from centering only. It ignores corners, surface, and holder wear.

Should you regrade or reholder your PSA slab?

Reholder keeps your grade and swaps a damaged case. Regrade reopens every subgrade and can drop the label. On a flat slab photo, check centering first. Gem Mint margins with a PSA 9 label may justify the fee. Sound case, acceptable centering: reholder only.

Paying regrade fees when only the plastic failed is the common mistake. Reholder swaps the shell and keeps the number. Regrade sends the card through full grading again under current standards.

Slab listings on eBay, Carousell, and show tables are rarely flat scans. Centering is the one subgrade you can pre-screen from photos. If margins already fail PSA 8 tolerance, regrade usually isn’t worth the fee, even when the case looks fine.

PSA regrade vs reholder: full decision guide

Why card centering matters

Graders score corners, edges, surface, and centering. Only centering is measurable from a photo before you pay submission fees. Sharp corners and a clean surface still cap at PSA 8 or 9 when borders sit off. PSA 9 to PSA 10 can double or triple resale. Measure margins first. Cheapest check before you submit.

Once you’ve confirmed a card is well centred and worth grading, protect it on its way to and from the grader with a premium PSA UV glass protector, or explore our graded card trading & brokerage service.

Common Questions

Card centering: frequently asked questions

01What centering is required for a PSA 10?
PSA 10 Gem Mint needs 55/45 or better on the front and 75/25 or better on the back. PSA 9 allows up to 60/40 front. PSA 8 allows up to 65/35.
02How accurate is the Appaw centering analyzer?
It depends on the photo. A flat scan with guides on the cut edge and art border usually lands within one or two points of a grader. Angled phone shots skew the ratios. Don’t trust those readings.
03How do I take the best photo for measuring centering?
Lay the card flat on a dark background. Shoot straight down with even light. Keep the camera parallel to the card. A flatbed scan is best.
04Does this tool work for Pokémon, sports, and other TCG cards?
Yes. Any rectangular trading card works. The tool compares the printed border to the outer cut edge.
05Is the card centering calculator free?
Yes. It runs in your browser with no sign-up. Measurement stays on your device. Nothing uploads to our servers.
06Should I regrade or reholder my PSA slab?
Reholder fixes the case and keeps the grade. Regrade reopens every subgrade and can drop the label. Screen centering first: Gem Mint margins with a PSA 9 label may justify regrade fees. A sound case is reholder only.
07Can regrading downgrade my card?
Yes. PSA re-scores corners, edges, surface, and centering under current rules. PSA 10 often comes back as PSA 9. Front centering worse than 55/45 is a red flag.
08Can I check centering on a graded slab photo?
Yes. Switch to Graded slab mode. Align guides on the card face inside the holder, not the plastic edge. Use Adjust image for tilt and glare. Flat scans through the case work best.
SourcesLinks

References & further reading

Official grading standards

Related collector guides