Gold calculator

Calculation 1: Value of gold metal

This calculation determines the value of gold metal based on the weight, purity, and bid price for gold metal.

Calculation 2: Price based on a given melt value %

This calculation determines a price relative to the value of gold metal from calculation 1.

Calculation 3: Melt value % based on a given price

This calculation determines how the price compares relative to the value of gold metal from calculation 1.

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Additional information

• Hallmarks - karat (US Spelling - k, kt), carat (UK Spelling - c, ct), or number in millesimal fineness scale.
• Troy weight - preferred unit of mass for precious metals.
• Karat scale - purity expressed as a proportion of 24. Preferred in US and UK.
• Millesimal fineness scale - purity expressed as a proportion of 1000. Preferred in most of Europe.
• Gold nugget (or native gold) - usually 20.5K to 22K purity (83% to 92% by mass).
• Colored gold - Yellow gold, white gold, rose, red, and pink gold, spangold, green gold (or electrum), and grey gold.
• Gold filled - a layer of gold mechanically bonded on the surface of another metal (the gold component typically makes up more than 5% of the item's total weight). The jewelry should be hallmarked with two numbers - first is the proportion, such as 1/10, 1/20 and second is the gold purity. For brand new jewelry it is suppose to represent the theoretical amount of gold relative to the solid gold equivalent of the same mass. To use on the calculator above multiply the weight by the proportion (for example, 1/10 (0.1) or 1/20 (0.05)) and enter the purity as per normal. For example, for 12K solid gold the gold component would make up 50% of the jewelry's weight (12/24); whereas, 1/10 12K gold filled the gold component would make up 5% of the jewelry's weight (0.1 x 12/24). If it is only gold filled on a portion of the jewelry's surface then you will need to multiply the weight by this proportion also. For example, if the proportion of the surface gold filled was only 50% (single-sided) and stamped 1/10 12K gold filled the gold component would make up 2.5% of the jewelry's weight (0.5 x 0.1 x 12/24). For secondhand jewelry it would be less than the theoretical amount due to wear. Look for the hallmarks "GF" or "G.F".
• Gold plated, gold electroplated, gold layered, gold overlay, rolled gold plated or gold leaf - a thin layer of gold on the surface of another metal (the gold component typically makes up less than 5% of the item's total weight). The layer is often so thin that it contains practically no gold and cannot be used in the above calculators. Look for the hallmarks "GP", "G.P", "GEP", "HGP" or "G.E.P".
• Vermeil (silver-gilt or gilded/gilt silver) - pure or sterling silver coated or plated in gold or gold alloy. Use our silver calculator to calculate the value of the silver metal component. Look for the hallmarks "925", ".925", or "S925".

Disclaimer

Our precious metal melt value calculators are for information purposes only.

We do not buy or sell precious metals.

Precious metal melt value only

Precious metals are often used inside alloys (mixture of metals).

Our melt value calculators are only calculating the value of the precious metal component.

Solid jewelry

The calculators assume homogenous (or uniform) composition.

Rounding

We use a simple rounding algorithm in calculating totals. This is due to accepting a large range of currencies and the need to present user-friendly numbers.

Price of precious metals

This website uses the bid price for the price per troy ounce of precious metals.

• Bid price: The price investors are willing to buy.
• Ask price: The price investors are willing to sell.
• Spot price: The price investors are buying and selling for immediate delivery.
• Bid-ask spread: The difference between the bid price and the ask price.