The Precious Metal Alloy Value calculator computes the Jeweler's Buy Price for precious metals based on the metal, weight, purity and current spot price.
INSTRUCTIONS: Choose units (e.g. pennyweight or gram) and enter the following:
 (W) weight of the precious metal alloy
 (M) choice the type of precious metal (gold, platinum, palladium or silver)
 (P) the percentage of the metal's purity (e.g 98,5%). This is a percentage not a karat.
 (s) the percentage fee for scrap metal processing/refining
 (f) the percentage profit margin (fee) for the jeweler.
Precious Metal Alloy Value (V): The Jeweler's Buy Price for the Precious Metal Alloy (V) is returned in United States dollars (USD). However, this can be automatically converted to other currencies via the pulldown menu.
The Math / Science
The value of precious metal alloy to a jeweler is the refined value of the metal in the alloy minus the refining fee and the jeweler's fee. The formula for the Precious Metal Alloy Value is as follows:
V = SPOT(M) • W • P • (1  s  p)
where:
 V is the value of the precious metal alloy
 W is the measured weight or mass of the precious metal
 M is the precious metal (gold, platinum, palladium or silver)
 SPOT(M) is the current spot price of the precious metal
 P is the percent purity of the precious metal
 s is the scrap or refinement fee
 f is the jeweler's fee (profit)
The result is the price that can be given to the seller of the metal while paying the refiner and making the profit identified. The weight can be in Troy ounces, pennyweight or grams. vCalc converts the weight into Troy Ounces and then fetches the current spot price for an ounce of gold. It then multiplies the weight of the pure gold content against the spot price and scrap discount percentage to give the gold's value. discount(scrap) = 1  scrap
Note: scrap is a percentage.
SPOT comes from /www.xmlcharts.com/cache/preciousmetals.xml
Gold SPOT PRICES 

($/gram) 
($/troy_oz) 

$61.726 
$1919.89 

Updated every Two Minutes 

 20 Swiss Gold Franc Value: Computes the value of 20 Swiss Fran coins based on the number of coins, SPOT and any numismatic factors
 Gold British Sovereign Coins Value: Computes the value of British Sovereign coins based on the number of coins, SPOT and numismatic factors.
 20 Italian Gold Lira Coin Market Value
 Krugerrand Coins Value: Computes the value of South African Krugerrand coins based on their size, the number of coins, SPOT and numismatic factors.
 US Gold Eagle Coin Value: Computes the value of U.S. Gold Eagle coins based on their size, the number of coins, SPOT and any numismatic factors.
 Gold Maple Leaf Coins Value: Computes the value of Canadian Maple Leaf coins based on their size, the number of coins, SPOT and numismatic factors.
 Zimbabwe 1 oz Gold Coin Value: Computes the value of a MosioaTunya coin based on the current spot price of gold and a mint adder.
 Gold Value: Computes the value of gold based on the weight, karat purity, a refiner's fee and a fee to the retailer (jeweler).
 Alloy Value: Computes the value of platinum, palladium, silver or gold based on the weight, percent purity, a refiner's fee and a fee to the retailer (jeweler).
 Gold SPOT: The value of a gram, penny weight or troy ounce of gold bullion (.9999) in U.S. dollars or other currencies.
 Density of Gold: Mean density of gold bullion (.9999).
Basic Investor Calculators
 BlackScholes Equation: Compute the Call and Put Option based on the BlackScholes equation and the stock or spot price, strike price, number of years to maturity, percent volatility and the riskfree rate.
 30 Day Yield Equation: Computes the SEC's 30 day yield function for bond funds based on the income in the prior 30 days, accrued expenses in the prior 30 days, outstanding shares and max price per share.
 Present Value computes the present value of a fixed annuity.
 Future Value computes the future value of a fixed annuity.
 Interest Rate for Future Value  computes the annual fixed interest rate required for a present value to accrue to the future value over a number of periods.
 Number of Periods Required  computes the number of periods required to achieve a future value from a present value at a fixed annual interest rate.
 Precious Metal Value  computes the current market value of gold, platinum, silver and palladium based on bullion weight and purity.
 Currency Conversion  computes the current value of a currency amount (e.g., $2,000 US dollars) in Euros, Great Britain Pounds, Canadian Dollars, Yuan, Yen, Rubbles, Swiss Francs, Australian Dollars, South African Rands, Brazial Reals, Mexican Pesos, Indian Rupees and U.S. dollars.