What Does 50/50 Centering Mean in Card Grading?

50/50 centering means the card’s border is perfectly even: both sides are the same width. This is the ideal centering ratio, making your card eligible for the highest centering subgrades from any grading company.

What Is 50/50 Centering?

50/50 centering describes a card where the border on one side is exactly the same width as the border on the opposite side. For example, the left and right borders on the front of a card are identical in size. This ratio is measured separately for the front and back of the card, with most grading standards focusing on the front unless otherwise specified. You can confirm your card’s exact centering ratio by measuring it in the Midpoint app.

Why Is 50/50 Centering Important?

A 50/50 ratio is the best possible centering and is considered perfect by all major grading companies.
It maximizes your card's eligibility for the highest centering subgrade (such as a BGS 10 Pristine, which effectively requires 50/50 front centering).
Cards with 50/50 centering stand out visually and are more appealing to collectors and buyers.

How Does 50/50 Centering Affect Grading?

Grading companies assign a centering subgrade as part of their overall evaluation. A 50/50 centered card meets or exceeds the strictest published standards for the top centering grade at PSA, BGS, CGC, SGC, and others. However, centering is only one of several subgrades; corners, edges, and surface condition also significantly impact the final grade. Always check the current published standards for each grading company, as requirements can change.

How to Measure Your Card's Centering

Take a clear photo of your card.
Use a tool like the Midpoint app to automatically detect the borders and calculate the exact centering percentages for both the front and back.
Compare your measured centering to the grading company's published standards before submitting your card.

Get your card's exact centering ratio in seconds with Midpoint - free to start - and know its grade ceiling.

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FAQ

Is 50/50 centering considered perfect?

Yes, 50/50 centering is considered perfect and is required for the highest centering subgrade at all major grading companies.

Does 50/50 centering guarantee a Gem Mint grade?

No. While 50/50 centering is ideal, the final grade also depends on corners, edges, and surface condition.

How do I check if my card is 50/50 centered?

Measure your card's borders using the Midpoint app, which calculates exact centering ratios from a photo.

Do grading companies care about back centering?

Some do, but front centering is usually the main focus. Always check the grader’s current published standards.

Can a card with 50/50 centering get a low grade?

Yes, if the card has flaws in corners, edges, or surface, the overall grade will be lower despite perfect centering.