How Are Coins Graded?

What is Coin Grading?

Coin grading is the process of evaluating a coin’s condition and assigning it a standardized score that tells buyers and sellers how well it has been preserved. Two coins can share the same date and mint mark and still look nothing alike. While one might be worn smooth from decades in pockets, the other looks like it came off the press yesterday. Grading puts a common language around that difference.

Graders look at a handful of things: how much wear the coin shows, how much of its original luster remains, how many marks or scratches it has, how sharply it was struck, and its overall eye appeal. I’d assume every coin shop in the world uses grading, because condition can swing a coin’s value from a few dollars to a few thousand. If you’re new to collecting, think of the grade as the coin’s report card, and it’s one of the first things a buyer will want to know.

What is the Sheldon Scale?

The Sheldon scale is the 70-point system used to grade most U.S. coins. It was devised by Dr. William Sheldon, who introduced it in the late 1940s as a way to grade large cents, and it was later adopted across American coin collecting. The idea is simple: 1 is the lowest possible grade, a coin so worn it’s barely identifiable, and 70 is a perfect coin with zero flaws visible under magnification.

Along the way, the numbers are grouped into descriptive names: Good, Very Fine, Extremely Fine, About Uncirculated, and Mint State, among others. So a coin might be described as “Very Fine 20” or “Mint State 65,” combining the word with the number. It can look like a lot to memorize, but the basic distinction is that circulated grades describe varying amounts of wear, while Mint State grades from MS-60 through MS-70 require no circulation wear.

What Do Coin Grades Like MS-65 Mean?

“MS” stands for Mint State, which means the coin never circulated. The number after it tells you how nice it is. Mint State runs from 60 to 70. An MS-60 coin has no wear but can have plenty of scuffs, bag marks, and dull luster. As the number climbs, the coin gets sharper, shinier, and cleaner.

MS-65 is usually called “Gem” uncirculated, and it’s a milestone for many collectors. A coin at that level has strong luster, only minor marks that don’t distract the eye, and an attractive overall look. MS-70 is theoretically perfect, with no flaws visible under 5x magnification, and it’s very hard to achieve on most coins. A prefix you might see is “PF” or “PR,” which stands for Proof and follows the same numbering. Once you know “MS” means uncirculated, the number is easy to interpret.

What Is the Difference Between Circulated and Uncirculated?

A circulated coin has been used as money, passed from hand to hand and pocket to pocket, and it shows. The high points of the design wear down first, so you’ll notice flattened hair, smoothed lettering, and dull surfaces. The more wear, the lower the grade, which is why a heavily worn coin might be graded “Good” while a lightly worn one earns “About Uncirculated.”

An uncirculated coin, also called Mint State, likely never entered circulation at all. It went from the Mint to a bag, a roll, or a collector without ever being spent. It can still have tiny nicks from being jostled with other coins, but it has no wear from actual use. The distinction matters a lot to value: a coin that’s barely uncirculated can be worth several times as much as the same coin with just a hint of wear, which is why we always ask people not to rub or clean coins they suspect might be uncirculated.

What is PCGS?

PCGS stands for Professional Coin Grading Service, and it’s one of the two leading third-party grading companies in the United States. PCGS began operations in February 1986 and helped establish the modern market for third-party graded coins sealed in protective holders, using the 70-point Sheldon scale.

Third-party means PCGS isn’t buying or selling the coin they’re grading, it’s instead an independent opinion on authenticity and condition. That independence is the whole point. Because a PCGS grade carries weight across the market, buyers will often pay more for a PCGS-certified coin than for the same coin graded by an unknown source. PCGS also publishes a popular price guide and an online database called CoinFacts, which are two of the references we point customers toward when they want to research a specific coin’s value.

What Is NGC?

NGC stands for Numismatic Guaranty Company, and it’s the other major name in third-party coin grading, alongside PCGS. Founded in 1987, it uses the same 70-point Sheldon scale and the same basic approach: authenticate the coin, assign a grade, and seal it in a protective holder.

NGC has a strong reputation across the hobby. Collectors and dealers regard both PCGS and NGC as trustworthy, and a coin in either company’s holder is widely accepted in the market. There are small differences in how each company grades and labels coins, and some collectors have a preference, but for the beginner either one is a safe choice. So, if you see a coin sealed in a holder from either company, you can feel reasonably confident it’s genuine and graded by a respected authority.

What Does It Mean to Slab a Coin?

“Slabbing” a coin means having it graded and sealed in a hard plastic holder, which collectors call a slab. The holder is tamper-evident, so you can’t open it without leaving obvious signs, and it includes a label showing the coin’s date, denomination, grade, and a serial number for tracking.

There are practical benefits to slabbing. The holder protects the coin from fingerprints, scratches, and environmental damage, and it locks in the grade so buyers don’t have to guess. A slabbed coin is generally easier to sell, since the buyer can trust the label, especially when selling online or to someone you’ve never met. The tradeoff is that you can’t touch the coin directly or examine its edge easily, though you can still look at both sides clearly through the plastic. We buy certified coins in PCGS and NGC holders here at Haven Coin & Jewelry, along with less popular grading companies, and raw, ungraded ones.

How Much Does Coin Grading Cost?

Grading fees depend on the service you use, the tier you pick, and the value of the coin. Both PCGS and NGC offer different service levels, with faster turnaround and higher-value coins costing more to submit. There can also be extra charges for shipping, insurance, and handling, and membership programs with the grading companies may change the pricing.

Because those fees change from time to time, the most reliable way to know the current cost is to check the fee schedules directly on the PCGS and NGC websites before you submit anything. The main thing to keep in mind is that grading is a per-coin cost, so it adds up fast if you’re sending in a large group. That’s the reason it’s worth being selective about which coins you submit rather than grading everything you own. A little research up front can save you real money.

Is It Worth Grading Your Coins?

It depends on the coin. Grading tends to be worth it for coins that are valuable enough that the fee is a small fraction of the coin’s price, for key dates, and for coins you suspect are in exceptional condition. A rare date, a possible error, or an uncirculated coin that looks sharp and clean are the kinds of coins that may repay the cost.

It’s usually not worth it for common-date coins in worn condition, since the grading fee can cost more than the coin is worth. If you’re not sure where your coins fall, a good first step is having someone knowledgeable look through them. Here at Haven Coin & Jewelry in Hamden, Connecticut, our team will happily go through your coins and explain which ones have numismatic premiums and which are worth their base metal content. We offer free, no-obligation evaluations, and you can walk in during business hours or call (203) 717-4921 to book a time for a larger collection.

How Does Grading Affect a Coin’s Value?

Grade is one of the biggest drivers of a coin’s value, and the effect is often dramatic. The price difference between adjacent grades can be small at the low end of the scale, but it grows quickly toward the top. A common coin might cost almost the same in a lower grade whether it’s a little more or a little less worn, while a rare coin in a single higher grade can be worth many times as much.

This is especially noticeable at the Mint State level, where moving from MS-64 to MS-65, or from MS-65 to MS-66, can sometimes double or triple a price for the right coin. Grading also adds confidence: because the opinion comes from an independent authority, buyers are often willing to pay more for the certainty. Keep in mind that two coins with the same grade can still sell for different prices based on strike, eye appeal, and toning, but the grade is the starting point for almost every valuation conversation.

Does Cleaning a Coin Affect Its Grade?

Yes, and almost never in a good way. Cleaning a coin, whether with polish, a cloth, or even a gentle rub, leaves tiny scratches and removes the original surface that collectors prize. Grading services can usually detect it, and a cleaned coin typically won’t receive a regular numerical grade.

Instead, many cleaned or altered coins are returned with a “details” or similar designation that notes the problem, and those coins generally sell for much, much less than an uncleaned equivalent. This is why our standing advice is to leave old coins exactly as you found them, dirt, tarnish, and toning included. A coin that looks dull and dirty may be worth far more than one that was scrubbed to look shiny. If you’re unsure, bring it in as it is and let someone take a look first.

FAQ: Coin Grading

What is the Sheldon scale?

A 70-point scale used to grade coins, where 1 is a heavily worn coin and 70 is a perfect one.

What does MS-65 mean?

MS stands for Mint State, meaning the coin never circulated, and 65 is a “Gem” grade with strong luster and only minor marks.

Is coin grading worth it?

It can be for valuable, rare, or exceptionally preserved coins, but usually not for common coins in worn condition, because the fee can exceed the coin’s value.

Who grades coins?

The two leading third-party services are PCGS (Professional Coin Grading Service) and NGC (Numismatic Guaranty Company).