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Free tool

Card centering calculator and photo checker

Upload a photo of the front and back of any trading card, from Pokémon and Magic to baseball and basketball. The tool finds the card, straightens it and measures every border, then shows the centering ratios and the best PSA, BGS and TAG grade that centering allows. It is free, needs no account and runs entirely in your browser.

Measure centering from a photo

Upload the front and back. The card is found, straightened and measured to a fraction of a millimeter in your browser, with the same engine as the Binder AI app. Your photos are never uploaded.

Front of the card

Photograph the card straight down on a plain surface, out of the sleeve if you can. A flatbed scan works too.

Back of the card

Photograph the card straight down on a plain surface, out of the sleeve if you can. A flatbed scan works too.

No photo? Measure each border at its narrowest point. Use any unit (millimeters, inches or pixels from a straight-on photo) as long as you use the same one for all four sides.

Front borders
Back borders
Card type (TAG uses different back limits)
Front left/right55.2/44.8
Front top/bottom51.7/48.3
Back left/right60.3/39.7
Back top/bottom53.4/46.6

Best grade centering allows

  • PSAPSA 10 Gem Mint
  • BGS (Beckett)BGS 9 Mint
  • TAG (TCG)TAG 10 Gem Mint

Centering sets a ceiling, not a grade: corners, edges and surface can still pull a card lower. Limits are each company's published guidelines, compared at the nearest half percent; graders may allow small variances.

Check corners, edges and surface too with Binder AI

How to take a photo that measures well

  1. Take the card out of its sleeve or top loader. Plastic adds glare and hides the true card edge.
  2. Lay it flat on a plain surface that contrasts with the border, such as a dark mat for a white or yellow border.
  3. Hold the phone straight above the card with all four corners in the frame. A small tilt is corrected automatically.
  4. Use even light without a bright reflection on the border. Daylight near a window works well.
  5. Upload the front and the back, check that the blue guides sit on the inside edge of each border, and drag any that don't.

How card centering is calculated

Centering compares opposite borders. Add the two borders together and divide the wider one by the total. If the left border is 2.4mm and the right border is 2.0mm, the total is 4.4mm and 2.4 / 4.4 = 54.5%, so the card is 54.5/45.5 left to right. Do the same for the top and bottom. The worse of the two axes is the number graders compare with their limits, and the front and back are judged separately.

Measuring by hand

  1. Lay the card flat on a contrasting surface.
  2. With a millimeter ruler, measure each border at its narrowest point. Or photograph the card straight down and count pixels in any photo editor.
  3. Type the four front borders and the four back borders into the boxes. Units don't matter as long as they match.
  4. Pick TCG or sports so the TAG back limits match your card.

Pokémon and TCG cards vs sports cards

Pokémon, Magic, One Piece and Yu-Gi-Oh! cards usually have a solid colored border, which makes centering easy to read. Japanese Pokémon cards have thinner borders, so a small shift changes the ratio more. Many modern sports cards have chrome or patterned borders and some have none at all, so check the guides on the preview. TAG also uses different back limits for TCG and sports cards, which is why the calculator asks which kind of card you have.

What this tool can and can't tell you

Centering is one of four things a grader checks. Corners, edges and surface decide the rest, and a card with perfect centering can still come back a 7 because of a soft corner or a print line. The centering ceiling here tells you whether a top grade is possible at all. Binder AI estimates all four subgrades from the same two photos.

For a deeper walkthrough with worked examples, full-art cards and diamond cuts, read how to check card centering.

Centering standards used (as of October 2026)

PSA

GradeFront (worst axis)Back (worst axis)
PSA 10 Gem Mint55/4575/25
PSA 9 Mint60/4090/10
PSA 8 NM-MT65/3590/10
PSA 7 Near Mint70/3090/10
PSA 6 EX-MT80/2090/10
PSA 5 Excellent85/1590/10
PSA 4 VG-EX85/1590/10
PSA 3 Very Good90/1090/10
PSA 2 Good90/1090/10
PSA 1 Poor90/1090/10

PSA writes most limits as approximate and says a small variance may be permitted at the grader's discretion based on eye appeal.

BGS (Beckett)

GradeFront (worst axis)Back (worst axis)
BGS 10 Pristine50/5055/45
BGS 9.5 Gem Mint55/45 (and 50/50 the other way)60/40
BGS 9 Mint55/4570/30
BGS 8 NM-MT60/4080/20
BGS 7 Near Mint65/3590/10
BGS 6 EX-MT70/3095/5
BGS 5 Excellent75/2595/5
BGS 4 VG-EX80/20100/0
BGS 3 Very Good85/15100/0
BGS 2 Good90/10100/0

Beckett calls its scale general guidelines rather than rules, and a 9.5 needs 50/50 one way and 55/45 the other on the front.

TAG (TCG)

GradeFront (worst axis)Back (worst axis)
TAG 10 Pristine51/4952/48
TAG 10 Gem Mint55/4565/35
TAG 9 Mint60/4075/25
TAG 8.5 NM-MT+62.5/37.585/15
TAG 8 NM-MT65/3595/5
TAG 7.5 Near Mint+67.5/32.5No limit published
TAG 7 Near Mint70/30No limit published
TAG 6.5 Excellent-Mint+72.5/27.5No limit published
TAG 6 Excellent-Mint75/25No limit published
TAG 5.5 Excellent+77.5/22.5No limit published
TAG 5 Excellent80/20No limit published
TAG 4.5 Very Good-Excellent+82.5/17.5No limit published
TAG 4 Very Good-Excellent85/15No limit published
TAG 3.5 Very Good+87.5/12.5No limit published
TAG 3 Very Good90/10No limit published
TAG 2.5 Good+92.5/7.5No limit published
TAG 2 Good95/5No limit published
TAG 1.5 Fair98.33/1.67No limit published

TAG writes its limits as approximate, and for grades below 8 it publishes a front centering limit only.

TAG (sports and non-TCG)

GradeFront (worst axis)Back (worst axis)
TAG 10 Pristine51/4954.5/45.5
TAG 10 Gem Mint55/4570/30
TAG 9 Mint60/4090/10
TAG 8.5 NM-MT+62.5/37.595/5
TAG 8 NM-MT65/35No limit published
TAG 7.5 Near Mint+67.5/32.5No limit published
TAG 7 Near Mint70/30No limit published
TAG 6.5 Excellent-Mint+72.5/27.5No limit published
TAG 6 Excellent-Mint75/25No limit published
TAG 5.5 Excellent+77.5/22.5No limit published
TAG 5 Excellent80/20No limit published
TAG 4.5 Very Good-Excellent+82.5/17.5No limit published
TAG 4 Very Good-Excellent85/15No limit published
TAG 3.5 Very Good+87.5/12.5No limit published
TAG 3 Very Good90/10No limit published
TAG 2.5 Good+92.5/7.5No limit published
TAG 2 Good95/5No limit published
TAG 1.5 Fair98.33/1.67No limit published

TAG writes its limits as approximate, and for sports cards graded 8 or lower it publishes a front centering limit only.

What to do with the result

Sources

Frequently asked questions

Can I check card centering from a photo?

Yes. Upload a photo above and the tool finds the card, corrects the angle of the shot and measures each border in millimeters. It works best with the card out of its sleeve, flat on a plain surface that contrasts with the border, photographed straight down in even light. A flatbed scan works too.

Are my photos uploaded anywhere?

No. The measurement runs in your browser on your own device, using the same engine as the Binder AI app. The photo is never sent to a server and nothing is saved.

How do I calculate card centering?

Measure two opposite borders, add them, and divide the larger border by the total. A 3mm left border and 2mm right border is 3 / 5 = 60%, written 60/40. Do the same for top and bottom, and for the back. Your centering is the worse of the two axes on each side.

What centering does a PSA 10 need?

PSA's published standard for a Gem Mint 10 is approximately 55/45 or better on the front and 75/25 or better on the back. A PSA 9 allows about 60/40 front and 90/10 back.

What centering does a BGS 9.5 or Pristine 10 need?

Beckett's guidelines for a 9.5 centering subgrade call for 50/50 one way and 55/45 the other on the front, with 60/40 on the back. Pristine 10 calls for 50/50 on the front. Beckett's own pages differ on the Pristine back limit, so the calculator uses the stricter 55/45.

Why does TAG ask whether my card is a TCG or sports card?

TAG publishes different back-centering limits for trading card games and for sports and other cards. For example, a TAG Gem Mint 10 allows about 65/35 on the back of a TCG card and about 70/30 on the back of a sports card.

Can I use pixels from a photo instead of a ruler?

Yes. Ratios don't depend on units, so pixel counts work as long as the photo is taken straight on with the card flat and square in the frame. A tilted photo distorts the borders. For borderless or full-art cards, measure from the card edge to a printed reference line instead.

What does 55/45 or 60/40 centering mean?

The first number is the share of the wider border. 55/45 means one border is 55% of the two borders added together and the other is 45%. A perfectly centered card is 50/50. The bigger the first number, the more off-center the card.

Does back centering matter?

Yes, but the limits are looser. PSA allows about 75/25 on the back of a Gem Mint 10, and TAG publishes separate back limits for TCG and sports cards. Upload the back as well so the result reflects both sides.

How do I check centering on a full-art or borderless card?

Borderless cards have no border to measure, so graders use a printed element that should sit evenly, such as the frame around the art, the text box or the name bar. When the tool finds no printed border, drag the blue guides to that element. The same left and right, top and bottom comparison applies.

Why does my photo measure differently from my ruler?

A ruler is hard to read below half a millimeter, and a single reading at one point can differ from the average along the whole border. The photo tool measures the full length of each border after correcting the camera angle. A curled card, a thick sleeve or a strong reflection on the border can still throw the reading off, so check the guides on the preview.

Does centering affect card value?

A lot. Centering decides whether a card can reach the top grade, and the price gap between a 9 and a 10 is often several times the raw value. Off-center cards are also one of the most common reasons a card that looks perfect comes back a grade lower.

If centering passes, will my card get that grade?

Not necessarily. Centering is a ceiling: corners, edges and surface can still lower the grade, and graders use judgment. Check the other three with our pre-grading checklist or a Binder AI scan, which estimates all four subgrades.

Related guides

How to check card centeringRatios, standards, photo methods and worked examples.Read more →Pokémon card centering checkerThe photo tool set up for Pokémon and other TCG cards.Read more →PSA 10 centering requirementsFront and back limits for every PSA grade.Read more →BGS centering requirementsWhy a 9.5 needs one axis at 50/50.Read more →TAG centering standardsSeparate limits for TCG and sports cards.Read more →How to pre-grade cards at homeA step-by-step routine for all four grading factors.Read more →AI card grading, explainedHow photo-based grading works and when to trust it.Read more →

Check all four subgrades from two photos

Binder AI estimates centering, corners, edges and surface from two photos, identifies the card and shows recent sold prices. Free to download; grading is included with a subscription from $1.99/week.

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