How to Calculate the Melt Value of Gold Coins and Bars
Melt value is what the pure gold in a coin or bar is worth at a given spot price. Multiply weight in troy ounces by purity, then by the spot price per troy ounce. It leaves out dealer premiums, fees and any collector value, so it is not a price you can expect.
"Melt value" sounds technical, but the idea is simple. It is the value of the metal inside a coin or bar, as if you melted it down and sold only the metal. This page shows the math step by step, with examples. It is general education, not advice, and it makes no price predictions. It is part of our guide to Gold and Precious Metals Basics.
What is melt value?
Melt value is the worth of the pure metal in an item at a chosen price per unit of weight. That price is usually the spot price, a quoted market price for gold. Melt value is a calculation. Nobody has to melt anything for it to apply.
Melt value is not what a dealer will pay or charge. Dealers add or subtract amounts for costs and profit. Collector coins can also sell for more than their metal is worth. We explain those gaps in dealer premiums and markups.
What is the formula?
Three numbers go in:
- Weight of the item, converted to troy ounces.
- Purity, also called fineness: the share of the item that is pure gold, written as a decimal (91.67% becomes 0.9167).
- Spot price per troy ounce, from a source you choose on the day you calculate.
The formula is: weight (troy oz) × purity × spot price = melt value.
Gold is priced in troy ounces, not the ounce on a kitchen scale. Our guide to the troy ounce covers the difference. The key figure comes from the federal measurement tables. NIST lists 1 troy ounce as 480 grains, or 31.103 476 8 grams (NIST Handbook 44, Appendix C). So to turn grams into troy ounces, divide by 31.1035 (rounded).
How do you work out an example?
Every example below uses an invented spot price of $1,000 per troy ounce. It is a round number chosen only to make the arithmetic easy. It is not a current price, and it is not a forecast. Replace it with the live figure when you run the numbers yourself.
A coin with a weight in troy ounces
The U.S. Mint lists specifications for its bullion coins. For the 1 oz American Eagle gold coin, it gives a weight of 1.0909 troy ounces (33.931 grams) and a purity of 91.67% gold (U.S. Mint, Bullion Coin Programs). The weight listed is the whole coin, which includes some copper and silver. So you apply purity:
- 1.0909 × 0.9167 = about 1.000 troy ounces of gold (our calculation)
- 1.000 × $1,000 = $1,000 melt value at the illustrative spot price
A coin with a weight in grams only
If a weight is given only in grams, divide by 31.1035 first. The Mint lists the half-ounce American Eagle gold coin at 16.966 grams and 91.67% gold. Our arithmetic: 16.966 ÷ 31.1035 × 0.9167 = about 0.500 troy ounces of gold, or about $500 at the illustrative price.
A bar
Suppose a small bar is stamped 10 grams and 99.99% pure. Our arithmetic: 10 ÷ 31.1035 = 0.3215 troy ounces, and × 0.9999 = 0.3215 troy ounces of gold. At the illustrative price that is about $321.48. Always read the actual stamp or the assay card for weight and purity. Do not assume them.
A summary of the three examples
| Item (specification as listed) | Troy oz of gold (our math) | Melt value at an invented $1,000 spot |
|---|---|---|
| 1 oz American Eagle gold, 1.0909 troy oz, 91.67% | about 1.000 | about $1,000 |
| 1/2 oz American Eagle gold, 16.966 g, 91.67% | about 0.500 | about $500 |
| 10 g bar, 99.99% (hypothetical bar) | about 0.3215 | about $321 |
Which weight do you use: gross or pure?
This is the most common mix-up. Some coins state the gross weight of the whole coin, as the Gold Eagle does. Others state the gold content only. The Mint's page shows the American Buffalo gold coin at 1.000 troy ounce (31.103 grams) and 99.99% gold (U.S. Mint). The coin itself is marked ".9999 Fine Gold." The formula gives 0.9999 troy ounces, a difference of 10 cents at the illustrative price. Rounding of this size is normal. Read how each seller or issuer describes weight before you compare numbers.
Why is a dealer's price different from melt value?
Melt value ignores several things that are part of real transactions:
- Premiums. Buyers usually pay above spot for coins and bars. Sellers may pay less than spot.
- Spreads. The gap between a dealer's buy and sell price.
- Collector or numismatic value. Rare or graded coins can be priced on collectibility, not metal.
- Fees. Shipping, insurance, and in an IRA, custodian and storage fees. See Gold IRA fees.
Costs matter in an IRA too. Some coins are also treated differently from bullion under IRA rules; the collectibles rule page explains that.
What mistakes do people make?
- Using ounces on a kitchen scale instead of troy ounces.
- Forgetting purity, which overstates the value of lower-purity items.
- Using an old or unrelated price instead of the spot price on the day.
- Treating melt value as an offer. A quote from a buyer is what counts.
- Skipping verification. Our page on verifying your metals explains how holdings are checked.
How can you check the math?
A calculator helps. Our melt value calculator does the same steps. You enter weight, purity and a spot price you choose. Compare any dealer quote against that figure with the dealer quote analyzer. Silver works the same way, using silver's purity and spot price. See silver coins and bars.
Where does this fit with a gold IRA?
In a gold IRA, the price paid typically includes costs on top of metal value, such as dealer premiums and account fees. Melt value is a reference point that lets you see how large those add-ons are. Gold prices can fall as well as rise, and no result is guaranteed. For decisions about your own retirement accounts, talk with a qualified tax or financial professional.
What we did not check
We did not verify spot prices or any live quote. The $1,000 figure is invented. We did not review every U.S. Mint product, only the three listings used above (the 1 oz and 1/2 oz American Eagle gold coins and the American Buffalo gold coin).
Sources
- NIST Handbook 44 (2026), Appendix C: General Tables of Units of Measurement, National Institute of Standards and Technology. Accessed Invalid Date.
- Bullion Coin Programs, United States Mint. Accessed Invalid Date.
This guide is general education, not personalized financial, tax or legal advice. See our financial disclaimer, editorial policy and advertising disclosure.