Coin Grading Guide
A coin's grade is the single biggest driver of its value — the same date can be worth $200 or $20,000 depending on a few points. Here's how graded US coins are scored, what the abbreviations mean, and how the major services differ.
The Sheldon Scale (1–70)
Modern grading runs on the 70-point Sheldon scale, introduced for large cents in 1949 and now used for every US series. 1 is barely identifiable; 70 is perfection. The leap from circulated wear to Mint State is where prices accelerate sharply.
| Grade band | Range | What it means |
|---|---|---|
| Mint State (MS) | MS-60 – MS-70 | Uncirculated, never spent. MS-70 is flawless under 5× magnification. |
| Proof (PR / PF) | PR-60 – PR-70 | Specially struck for collectors, mirror fields. A strike type, not a quality tier. |
| About Uncirculated (AU) | AU-50 – AU-58 | A trace of wear on the highest points; near-mint eye appeal. |
| Extremely Fine (XF/EF) | XF-40 – XF-45 | Light, even wear; all major detail still sharp. |
| Very Fine (VF) | VF-20 – VF-35 | Moderate wear across the design, still pleasant. |
| Fine → Good (F–G) | G-4 – F-15 | Heavy circulation; rims and major devices remain. |
Strike vs. grade
MS (Mint State) and PR/PF (Proof) describe how a coin was struck, not how good it is. A business-strike coin is graded MS; a coin struck on polished dies for collectors is graded PR or PF. Both then carry a 60–70 quality number.
Strike & color designations
- RD / RB / BN — copper color: Red, Red-Brown, Brown. Full Red commands large premiums.
- FB / FBL / FH / FS — full-strike designations (Full Bands, Full Bell Lines, Full Head, Full Steps) that reward a complete strike.
- ★ (Star) / + — NGC's Star and PCGS/NGC's plus mark exceptional eye appeal within a grade.
- CAC — an independent sticker verifying a coin is solid-to-premium for its grade; CAC-approved coins trade higher.
PCGS vs. NGC vs. ANACS
Three services dominate. PCGS and NGC are the two most liquid — their slabs trade sight-unseen and carry the strongest market premiums. ANACS is the oldest US service and still respected, often at a slightly lower price point. Population data (how many a service has graded at each level) is a key rarity signal. Full comparison →
Why the slab matters
A third-party grade in a tamper-evident slab removes the two biggest risks in coin buying: authenticity and over-grading. That's why a certified coin reliably sells for more than the same coin raw — you're buying a guarantee, not a guess.
Grade it yourself first
Before you trust any listing, learn to read a coin. A good loupe and the Red Book are the cheapest upgrade a collector makes — see our collector gear picks. Then put it to use: browse graded coins and see where to buy.
Frequently asked questions
What does MS-65 mean?
MS-65 (“Gem Uncirculated”) is a mint-state grade on the 70-point Sheldon scale: a coin with strong luster and only minor marks outside the focal areas. It’s the classic collector target for most series.
What is the Sheldon scale?
The 70-point scale used to grade US coins, from 1 (barely identifiable) to 70 (flawless). Circulated grades run from G-4 up to AU-58; mint state is MS-60 to MS-70.
What’s the difference between PCGS, NGC, and ANACS?
They are the three major US grading services. PCGS and NGC are the most liquid — their slabs trade sight-unseen and carry the strongest premiums. ANACS is the oldest US service and often slightly cheaper. All three authenticate and grade.
Why does one grade change a coin’s value so much?
Higher grades are scarcer, so price accelerates as you climb. For many coins the jump from MS-65 to MS-67 can multiply the value several times over.