Coin Metal Value & Bullion Melt Calculator
Calculate intrinsic silver, gold, and base-metal coin melt values, convert gram weights into pure troy ounces (ASW/AGW), build multi-coin vault stacks, and compare dealer buyback payouts.
Intrinsic Coin Melt & Stack Valuation Wizard
Which coin metal are you valuing?
Choose a precious or base metal category to load official coin weights and millesimal fineness, or enter any custom scale reading.
Select a World Coin Standard
Tap a reference coin below to load its exact gross weight in grams, millesimal fineness, and pure troy ounce content.
Enter Custom Coin Weight & Fineness
Enter the single-coin (or total lot) weight and select an alloy standard or custom millesimal purity (0.001 to 0.9999).
Configure Stack Quantity & Market Spot Price
Combine Multiple Coins into One Stack
Tap + Add to Vault Stack above to save this calculation and combine multiple silver or gold coin types into one grand total.
| Coin / Batch | Fine oz t | Melt Value |
|---|---|---|
| Total Stack (0 items) | 0.0000 oz t | $0.00 |
World Coin Millesimal Fineness & Troy Ounce Conversion Chart
Precious metal coins are alloyed with copper or silver to increase circulation durability. Millesimal fineness expresses purity in parts per thousand (such as .900 Coin Silver or .917 Crown Gold), allowing instant conversion from gross scale grams to pure troy ounces (31.1034768 g).
| Monetary Alloy Standard | Metallic Composition | Millesimal Purity | Pure oz t per 100 g | Action |
|---|---|---|---|---|
| .999 Fine Silver (Bullion) | 99.9% Pure Silver | 0.999 (99.9%) | 3.2119 oz t | |
| .925 Sterling Silver | 92.5% Silver, 7.5% Copper | 0.925 (92.5%) | 2.9739 oz t | |
| .900 Standard Coin Silver | 90% Silver, 10% Copper | 0.900 (90.0%) | 2.8936 oz t | |
| .835 Continental LMU Silver | 83.5% Silver, 16.5% Copper | 0.835 (83.5%) | 2.6846 oz t | |
| .833 Thaler Silver | 83.3% Silver, 16.7% Copper | 0.833 (83.3%) | 2.6791 oz t | |
| .800 World Circulation Silver | 80% Silver, 20% Copper | 0.800 (80.0%) | 2.5721 oz t | |
| .750 Commonwealth & Philippine Silver | 75% Silver, 25% Copper | 0.750 (75.0%) | 2.4113 oz t | |
| .720 Dutch & Mexican Silver | 72% Silver, 28% Copper | 0.720 (72.0%) | 2.3149 oz t | |
| .500 Half-Silver Alloy | 50% Silver, 50% Cu-Ni-Zn | 0.500 (50.0%) | 1.6075 oz t | |
| .9999 Fine Gold (24 Karat) | 99.99% Pure Gold | 1.000 (100.0%) | 3.2148 oz t | |
| .986 Ducat Gold (23.6 Karat) | 98.6% Gold, 1.4% Copper | 0.986 (98.6%) | 3.1701 oz t | |
| .917 Crown Gold (22 Karat) | 91.67% Gold, 8.33% Copper/Silver | 0.917 (91.7%) | 2.9473 oz t | |
| .900 Monetary Gold (21.6 Karat) | 90% Gold, 10% Copper | 0.900 (90.0%) | 2.8936 oz t | |
| Bi-Metallic: CuNi Ring / Brass Core | CuNi Outer Ring + 3-Layer Nickel-Brass Core (e.g. 2 Euro, £1) | Base Alloy | — | |
| Bi-Metallic: Brass Ring / CuNi Core | Nickel-Brass Outer Ring + CuNi Core (e.g. 1 Euro) | Base Alloy | — | |
| Nordic Gold (Cu89 Al5 Zn5 Sn1) | 89% Cu, 5% Al, 5% Zn, 1% Sn | Base Alloy | — | |
| Cupronickel Clad Copper | 91.67% Copper, 8.33% Nickel | Base Alloy | — | |
| Standard Cupronickel (75% Cu, 25% Ni) | 75% Copper, 25% Nickel | Base Alloy | — | |
| Classic Coinage Bronze (95% Cu) | 95% Copper, 5% Tin/Zinc | Base Alloy | — | |
| Nickel Silver / CuNiZn (Cu70 Zn18 Ni12) | 70% Copper, 18% Zinc, 12% Nickel | Base Alloy | — | |
| Magnetic Nickel-Plated Steel (NGC) | 94% Steel Core, 6% Nickel Plating (Magnetic) | Base Alloy | — |
Frequently Asked Questions About Coin Melt Values
First, multiply the coin's gross weight in grams by its millesimal fineness (for example, 26.73 g × 0.900 = 24.057 g of pure silver for a US Morgan Dollar). Next, divide the pure gram weight by 31.1034768 (the exact number of grams in 1 Troy Ounce) to get 0.7734 oz t ASW, and multiply that figure by the current spot price per troy ounce.
Calculate Coin Melt NowGlobal bullion markets quote gold, silver, and platinum spot prices exclusively in Troy Ounces (31.1034768 grams or 480 grains), a medieval monetary standard that is roughly 9.7% heavier than the standard avoirdupois ounce (28.3495 grams). Using kitchen ounces instead of troy ounces overestimates a coin's melt value by nearly 10%.
Open Roll & Weight WizardGovernment .999 bullion coins (such as American Eagles, Maple Leafs, and Krugerrands) generally command 97% to 102% of spot when sold to dealers. Circulated .900 and .835 silver coins ("junk silver") typically trade at 90% to 95% of melt, while lower-purity (.500 or .720) world silver often clears at 82% to 88% of melt due to higher refining costs.
Check Numismatic Grading ROICombine a 0.01 g digital scale and digital calipers with Archimedes' hydrostatic water displacement test. Because pure silver (10.49 g/cm³) and gold (19.32 g/cm³) are significantly denser than brass, steel, or cupronickel, measuring underwater displacement immediately exposes base-metal counterfeits.
Open Specific Gravity Water Lab