Should you grade
that card?
Know in seconds whether grading will pay — or whether you're better off keeping the card ungraded.
Expected value across every grade outcome, the exact PSA 10 rate you need to break even, and comps backed by MySlabs sold prices where we have them and active eBay listings where we don't — labeled per grade, never blended.
Opens pre-filled with a sample card — edit any field, or start with your own.
See the math that matters
Take a 2023 Prizm Patrick Mahomes you picked up raw for $50. You estimate a 60% chance of PSA 10. Should you grade it?
Grading adds $74 in expected value. Break-even is only a 7% PSA 10 rate — well below your 60% read.
Stop guessing. Start calculating.
Every feature is built around one question: does grading this card actually make you money?
Decide with math, not gut feel
Probability-weighted expected value across every grade outcome — so you know when grading clears the fees and when to sell raw.
See the break-even instantly
We solve for the exact PSA 10 rate your card needs to justify submission. If your honest read is below it, don't ship it.
Sold comps + active listings, labeled
Recent MySlabs sold prices when we have them for your card and grade; active eBay listings (asking prices, not sold) when we don't. Every value is labeled with its source — never blended, never hidden.
Every major grader covered
Supports PSA, BGS, and SGC fee structures using publicly available information. Swap grading companies and watch the math update.
Answers in under a minute
Enter a card, set your PSA 10 confidence, and get a clear Worth Grading / Borderline / Keep Ungraded recommendation flag — no spreadsheet required.
Stress-test every assumption
Drag sliders to see how comps, fees, and grade rates swing your outcome, and compare best / base / worst case side by side before you ship.
Frequently asked questions
How does the calculator determine if I should grade?
It calculates the expected value of grading — a probability-weighted average of all possible grade outcomes — and compares it to your raw sale price. The recommendation engine factors in EV difference, ROI on grading costs, downside risk, and PSA 10 dependency.
What does "expected value" mean for card grading?
Expected value (EV) is the weighted average outcome based on your grade probabilities. For example, if a PSA 10 nets $200 (60% chance) and a PSA 9 nets $80 (40% chance), the EV is $152. It's the most honest way to evaluate a grading decision.
What fees does the calculator account for?
The calculator accounts for the PSA grading fee, shipping to PSA, return shipping, sales tax, and marketplace selling fees (like eBay's ~12.9%). All of these are subtracted from gross sale prices to show real net proceeds.
How do I estimate PSA grade probabilities?
Start with known population data on PSA's website. For modern cards in excellent condition, PSA 10 rates often range from 40–70%. For vintage cards, PSA 10 rates can be under 5–10%. Your assessment of the card's surface, corners, edges, and centering guides the rest.
Is this only for PSA grading?
The calculator uses PSA grade tiers (10/9/8/below 8), but the math works for any grading company. Just enter the sale comps for your preferred grader and corresponding fees.
Where do the comp prices come from — active listings or sold prices?
Comp Lookup autofill uses MySlabs sold comps when they exist for the card and grade — recent realized sale prices — and falls back to active eBay listings (asking prices, not sold) to fill any grade buckets MySlabs doesn't cover. Sources are labeled per grade and never silently blended. MySlabs coverage is strong for vintage and mainstream slabs but can be thin for modern Prizm-class rookies and variant-heavy product lines, so for those cards you can still paste sold comps from 130point, PSA APR, or eBay sold listings via the Paste tab.
Can I save my calculations?
Yes. Create a free account to save up to 3 cards in SlabReserve. Pro unlocks unlimited saves, the Profit Tracker for realized P/L, side-by-side comparisons, and exports.
Make your next grading decision with confidence
Free. No account required. Results in under a minute.