Scrap Gold Calculator

How the Scrap Gold Calculator Works

Whether you are looking to sell old jewelry, broken chains, or gold coins, knowing the exact intrinsic value of your items is critical before visiting a pawn shop or cash-for-gold business. This scrap gold calculator empowers you by determining the absolute melt value of your gold based on its weight, purity, and the current market spot price.

The Core Methodology

To calculate the value of scrap gold, three primary variables are required: the spot price of gold, the exact weight of the item, and the item's karat (purity). The mathematical process involves determining the absolute amount of pure gold within the item, converting its physical weight into troy ounces (the standard measurement for precious metals), and multiplying that by the current spot price.

The standard formula for calculating the full melt value is:

Understanding Purity: The Karat System

Gold is naturally a very soft metal. To make it durable enough for everyday wear in jewelry, it is alloyed (mixed) with other harder metals such as copper, silver, nickel, or zinc. The purity of gold is measured in karats (k or kt), with 24 karat representing 100% pure gold.

When you have a piece of 14k jewelry, it means that 14 parts of the metal are pure gold, and the remaining 10 parts (out of 24 total) are other metals. Therefore, the purity ratio is 14 divided by 24, which equates to exactly 0.5833 (or 58.33%). The scrap gold calculator uses this ratio to strip away the weight of the base metals and isolate the weight of the pure gold content.

Weight Conversions for Precious Metals

A frequent point of confusion when weighing gold at home is the difference between standard ounces and troy ounces. Kitchen scales measure in standard "avoirdupois" ounces, where 1 ounce equals 28.3495 grams. However, the spot price of gold is universally quoted in troy ounces, which are slightly heavier.

• 1 Troy Ounce = 31.1034768 grams
• 1 Pennyweight (dwt) = 1.55517384 grams
• 1 Troy Ounce = 20 Pennyweights
• 1 Gram = 0.0321507 Troy Ounces

If you weigh your gold on a home scale in standard ounces, you must convert it to grams first, and then to troy ounces. Our calculator handles all of these precise conversions automatically behind the scenes.

Buyer Payout Percentages

It is crucial to understand that the "melt value" calculated here is the raw, intrinsic value of the pure gold content. If you take your scrap gold to a buyer, they will almost never pay you 100% of this value. Gold buyers, pawn shops, and jewelers run businesses that incur overhead costs, and they must eventually sell the gold to a refinery, which also takes a cut.

Typically, a local buyer might offer you anywhere from 60% to 80% of the true melt value. For highly desirable items, or if you are selling to a direct refinery in bulk, you might receive up to 90% or 95%. By adjusting the "Buyer Offer Percentage" slider or input in our calculator, you can establish a realistic expectation of the cash you will actually receive, preventing you from accepting an unfair lowball offer.

Need to calculate values for math and engineering instead? Try our Eigenvalue Calculator.