How to Grade Circulated Coins: AG to AU Guide

Learning to Grade Circulated Coins

Grading circulated coins is a skill built through practice and careful observation. Unlike uncirculated coins where you're evaluating surface quality, circulated coin grading is fundamentally about measuring wear — how much of the original design detail has been lost through use in commerce.

This article will teach you the systematic approach professional graders use to evaluate circulated coins from About Good (AG-3) through About Uncirculated (AU-58).

The Fundamentals of Wear Assessment

When a coin circulates, the highest points of the design wear first. These are the areas that protrude most from the coin's surface and make contact when the coin is stacked, rubbed, or handled. Knowing each coin type's wear points is the key to accurate grading.

For example:

Lincoln cent — Wear shows first on Lincoln's cheekbone and jaw line (obverse) and on the wheat stalks or memorial columns (reverse).
Morgan dollar — Wear shows first on Liberty's hair above the ear and on the eagle's breast feathers.
Walking Liberty half — Wear shows first on Liberty's head, hand, and the high points of the flowing robe.

Step-by-Step Grading Process

Determine if the coin is circulated or uncirculated — Look for any flat spot or loss of luster on the highest points. If you see wear, the coin is circulated. If not, it's Mint State (covered in the next article).
Identify the wear points — Know where wear appears first on the specific coin type you're examining.
Assess the overall amount of wear — How much design detail remains? This places the coin in a general grade category (Good, Fine, Very Fine, etc.).
Look at peripheral detail — Is the rim intact? Is the lettering complete and sharp? Are the stars fully defined?
Check both sides — Grade the obverse and reverse separately, then assign the overall grade based on the weaker side (with adjustments for eye appeal).
Consider eye appeal — A coin with even, attractive wear and original surfaces may deserve a slight bump. A coin with scratches, cleaning, or corrosion may deserve a deduction.

Grade-by-Grade Walkthrough

About Good (AG-3)

The coin is heavily worn but the design is outlined. You can identify the type and usually read the date and mint mark. Most interior detail is smooth. Rims may be worn into the lettering in places. AG-3 is popular for rare dates where any identifiable example is collectible.

What to look for: Can you read the date? Can you identify the type? If yes to both, you're likely at AG-3 or better.

Good (G-4 to G-6)

Major design elements are visible but flat. The outline of the main device (Liberty, eagle, president, etc.) is clear. Peripheral lettering is usually complete. Some interior detail may be visible at G-6 that's absent at G-4. Rims are defined but may merge with lettering in spots.

Key difference from AG: At Good, the design is more than just an outline — you can see the major features even though they're flat.

Very Good (VG-8 to VG-10)

Design elements are clearly outlined with some interior detail. On a Morgan dollar, you'd see some hair detail above Liberty's ear. On a Buffalo nickel, the horn would be partially visible. Rims are complete. Lettering is sharp. The coin starts to look "collected" rather than just identifiable.

Key difference from Good: Interior design detail begins to appear. The coin has depth rather than being flat.

Fine (F-12 to F-15)

Moderate even wear on the high points, but all major features are sharp. You can see clear design detail throughout. On a Walking Liberty half, you'd see the fingers on Liberty's outstretched hand and skirt lines. Hair curls, feather detail, and other fine features are partially visible.

Key difference from VG: Significantly more interior detail. The coin looks complete, just worn on the high points.

Very Fine (VF-20 to VF-35)

Light to moderate wear on high points only. Most design details are sharp. This is where coins start to look genuinely attractive. The full design is visible with wear limited to the most prominent areas. VF-35 shows noticeably less wear than VF-20.

Key difference from Fine: Wear is concentrated only on the highest points rather than being spread across the design.

Extremely Fine (EF/XF-40 to EF-45)

Light wear on the highest points only. All design details are sharp and clear. Traces of original mint luster may be visible in protected areas (around letters, in recesses). EF-45 shows slightly less wear than EF-40.

Key difference from VF: The wear is minimal and concentrated. You might need a loupe to see the difference between EF and AU on some coins.

About Uncirculated (AU-50 to AU-58)

The most critical grade range for value. AU coins show only the slightest friction on the very highest points. Most original mint luster remains (50% or more at AU-50, nearly all at AU-58). The distinction between AU-58 and MS-60 is one of the most consequential in all of numismatics — the price difference can be 2x to 10x or more.

AU-50: Wear visible on the highest points. About half the original luster remains.

AU-53: Slight wear on the high points. More than half the luster remains.

AU-55: Slight wear on only the highest points. Most luster remains.

AU-58: The barest trace of friction on the absolute highest point. Nearly full luster. This is the "slider" grade — extremely close to Mint State.

Common Mistakes to Avoid

Confusing luster loss with wear — A coin can lose luster from improper cleaning without actually being worn. Cleaned coins may look high-grade at first glance but show unnatural surfaces under magnification.
Grading by the better side — Always grade by the weaker side. A coin with an MS-63 obverse and VF-35 reverse is a VF-35 coin.
Ignoring problems — Scratches, rim bumps, environmental damage, and cleaning all affect a coin's grade and can prevent it from being graded by PCGS or NGC.
Not knowing the coin type — Each coin type wears differently. Study grading guides specific to the series you collect.

How to Practice

Study certified examples — PCGS CoinFacts and NGC Coin Explorer have photographs of coins at every grade level for most US series.
Attend coin shows — Handle coins in person. Ask dealers to show you the difference between grades. Most dealers are happy to educate willing learners.
Buy a grading guide — Photograde by James F. Ruddy and the Official ANA Grading Standards are essential references.
Grade before you look at the label — When examining slabbed coins, try to grade the coin yourself before reading the label. Track your accuracy over time.

Up Next

Circulated grading covers coins from AG to AU. The next article tackles the other half of the scale: How to Grade Uncirculated & Mint State Coins, where the nuances of contact marks, luster, and strike quality determine value.