What Is the Silver Coin Melt Calculator?
The silver coin melt calculator estimates the intrinsic value of a coin's silver content — the amount you would theoretically receive if the coin were melted down and sold as bullion. This "melt value" is independent of any collector or numismatic premium, and it forms the price floor for circulated silver coins. The calculation works for any silver coin worldwide as long as you know its weight, silver purity (fineness), and the current spot price of silver.
How to Use It
Enter the number of coins, the gross weight of a single coin in troy ounces, the silver purity as a percentage, and the current silver spot price per troy ounce. The calculator multiplies weight by purity to find the actual silver content, then multiplies by the spot price and the number of coins to give the total melt value. It also breaks down the value and silver content per coin.
The Formula Explained
The core relationship is $$\text{Melt} = q \times (w \times p) \times s$$. The term \(w \times p\) converts the coin's gross weight into its pure silver content (its "actual silver weight" or ASW). Multiplying by the spot price values that silver, and multiplying by quantity scales the result to your whole batch.
Worked Example
Take 10 pre-1965 US 90% silver quarters. Each weighs about 0.18084 troy oz at 90% purity, so the silver content is \(0.18084 \times 0.90 = 0.16276\) oz per coin. At a spot price of $30/oz that is \(0.16276 \times 30 = \$4.8828\) per coin, or about $48.83 for all ten.
$$\text{Melt} = 10 \times (0.18084 \times 0.90) \times 30 \approx \$48.83$$
FAQ
Does melt value include numismatic premium? No. Melt value is only the silver content's worth; rare or graded coins can sell for far more.
What purity should I use? Common values are 90% (US "junk silver"), 92.5% (sterling), and 99.9% (.999 bullion). Check your coin's specification.
Why troy ounces? Precious metals are measured in troy ounces (~31.103 g), which differ from standard avoirdupois ounces.
