The Sheldon Scale: Grading U.S. Coins 1–70

Every U.S. coin you buy is described by a number from 1 to 70. That is the Sheldon scale, the grading language of American numismatics, and learning to read it is the single most valuable skill a collector can build. The number compresses a coin's entire state of preservation — how much wear it shows, how well it was struck, how clean its surfaces are — into a shorthand that buyers and sellers worldwide understand. Get fluent in it and you stop overpaying.

Where the scale came from

Dr. William Sheldon devised the scale in 1949, originally for large cents, with a quirky logic: a coin in grade 70 was meant to be worth seventy times one in grade 1. That price relationship long ago broke down, but the 1–70 framework stuck and became the universal standard. Today the major services — NGC and PCGS — assign these numbers, prefixed by a letter code for the coin's broad state of preservation.

Reading the grades

The letter prefix tells you the band; the number refines it. The big dividing line is wear: a coin that has circulated (any visible wear) can grade no higher than AU-58, while an uncirculated coin with no wear starts at MS-60. That MS line is where money concentrates.

• P-1 to FR-2 — Poor/Fair; barely identifiable.
• G-4 to VG-10 — Good to Very Good; heavy wear, major detail gone.
• F-12 to VF-35 — Fine to Very Fine; moderate, even wear.
• EF/XF-40 to AU-58 — Extremely Fine to About Uncirculated; light wear to a trace.
• MS-60 to MS-70 — Mint State; no wear at all, graded by marks, luster, and strike.
• PR/PF — Proof; a special manufacturing method, graded on the same numbers.

Why the Mint-State jumps cost so much

Once a coin is uncirculated, the grade is no longer about wear — it is about how many tiny contact marks, hairlines, and strike weaknesses it has, and how strong its luster is. The differences are subtle to a beginner's eye but enormous in price. An MS-63 might be a perfectly nice coin with a few marks; an MS-65 'gem' is noticeably cleaner and brighter; an MS-67 is exceptional. Because gem coins are scarce, each step up the MS ladder can sharply increase value — the jump from MS-63 to MS-65 can double a coin's price, and higher up the multiples grow steeper still.

How to use the scale

Treat the grade as a starting point, not the whole story. Two coins at the same number can differ in eye appeal — color, luster, and the location of marks — so always buy the coin, not just the label. For expensive coins, rely on NGC or PCGS grades rather than a raw seller's optimistic description, and beware 'details' grades, which flag a problem like cleaning or damage that keeps a coin from a straight grade. Learn the scale, then learn to see within it, and you will buy better coins for less.