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Gold calculator

How much is your gold worth?

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The gold calculator is a gold melt value calculator which can be used to determine the value of gold metal inside an item with a known weight and gold purity. These items may include gold jewelry (such as, bangles, bracelets, chains, earrings, necklaces, pendants, and rings), gold bullion and gold coins.

The gold calculator is designed to calculate the gold metal value for one item at a time. If you would like to calculate the gold metal value for multiple items simultaneously consider using the scrap gold calculator for scrap gold, the gold bullion calculator for gold bullion bars and coins, and the gold coin calculator for gold coins.

Table of contents:

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.


99.9% pure gold
Live Price

Step 1: Convert the weight of the gold alloy into troy ounces
Weight of gold alloy
= Weight of gold alloy × Conversion factor
= 0 × 31.1034768
= 0 oz t
Step 2: Convert the weight of the gold alloy into the weight of gold metal
Weight of gold metal
= Weight of gold alloy × Gold purity (%) ÷ 100
= 0 × 99.9 ÷ 100
= 0 oz t
Step 3: Calculate the value of gold metal
Value of gold metal
= Weight of gold metal × Price of gold metal
= 0 × 0
= 0

* Unit weight conversions
1 avoirdupois ounce (oz) = 28.349523125 g 1 baht = 15.244 g 1 carat (ct) = 0.2 g
1 grain = 0.06479891 g 1 kilogram (kg) = 1000 g 1 masha = 0.97 g
1 milligram (mg) = 0.001 g 1 pennyweight (dwt) = 1.55517384 g 1 pound (lb) = 453.59237 g
1 ratti = 0.1215 g 1 tael (China - Treasury standard) = 37.5 g 1 tael (Hong Kong) = 37.7993638 g
1 tola (India) = 11.6638038 g 1 tola (Pakistan) = 12.5 g 1 tonne (t) = 1000 kg
1 ton (short) = 907.18474 kg 1 ton (long) = 1016.047 kg 1 troy ounce (oz t) = 31.1034768 g


Calculation 2: Gold sellers - what price should I sell for?

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

This calculation is useful for people selling gold. For people selling to a gold buyer for cash it helps you negotiate a fair price. For people onselling gold it helps determine listing prices.

In addition, this calculation can also be used by gold buyers to come up with offer prices.


Step 1: Calculate price relative to the value of gold metal
= Value of gold metal × Gold metal value (%) ÷ 100
= 0 × 0 ÷ 100
= 0

Calculation 3: Gold buyers - is it cheap or expensive?

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

This calculation is useful for people buying gold. In general, how far the price deviates from the gold metal value determines if it is cheap or expensive.


Step 1: Calculate gold metal value (%)
Gold metal value (%)
= Price ÷ Value of gold metal × 100
= 0 ÷ 0 × 100
= 0 %


Generate a unique link which saves the inputs of the calculators above (excludes currency and price per troy ounce).

When people click the link, the inputs will automatically be pre-populated with the same inputs.


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Potential use cases

  • General public: Make informed decisions when buying or selling gold.
  • Cash for gold: Gold buyers can quickly calculate offers to sellers of gold.
  • Gold cost calculator: Jewelers can calculate the cost of gold for jewelry they are making.
  • Gold recyclers: Refiners can calculate the value of gold to be melted down.
  • Businesses selling used gold jewelry: Pawnbrokers, antique stores, and secondhand jewelry stores can quickly calculate listing prices based on a price relative to the gold metal value inside the used gold jewelry.



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, 2/25, 1/20, 1/40 and second is the gold purity. For brand new jewelry it is supposed 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), 2/25 (0.08), 1/20 (0.05) and 1/40 (0.025) - 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 gold layer is often so thin that the gold component only weighs a tiny fraction of the overall weight. They cannot be used in the above calculators because the weight of the gold component is unknown. 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".



The calculators on this page are for information purposes only.

We do not buy or sell precious metals.

Gold melt value only

Gold is often used inside alloys (mixture of metals).

The calculator on this page is only calculating the value of the gold metal component.

Solid gold jewelry

The calculators assume homogenous (uniform) composition.

Gold price

Gold trades on international commodity markets.

For gold, the three most important trading hubs are the London OTC market, the US futures market and the Shanghai Gold Exchange (SGE) which comprise more than 90% of global trading volumes.

This website uses the gold bid price which is different from the gold ask price and gold spot price:

  • Bid price: The price for immediate purchase.
  • Ask price: The price for immediate sale.
  • Spot price: The price trading (buying and selling) is occurring for immediate delivery.
  • Bid-ask spread: The difference between the bid price and the ask price.

Look under the gold price being used in the calculator to confirm when the price was last updated.

Live gold price

The live gold price is retrieved when the page first loads or when the currency is changed.

If you are on this webpage for some time then the price shown become less up-to-date, therefore we recommending refreshing the page every so often in this situation. The frequency you refresh is dependent on your tolerance for currency and price flucations and their effect on the calculator currency-denominated inputs and outputs.

Occasionally we are unable to connect to our live gold price feed.

If this occurs, the website will fall back to using the non-live gold price equivalent of the currency requested.

Non-live gold price

We aim to update the non-live gold price currencies once per hour.

Occasionally there will be a longer interval between updates.

All prices in this list should only be considered estimates due to small delays in data synchronization and the nature of price and currency fluctuations.

Other price influences

The gold metal value may only be one factor which influences the price.

Other factors may include, but not limited to:

Karat scale to fineness scale approximation

The karat scale purity is rounded to 0.1%. For example, 8K is rounded to 33.3% (or 333 in fineness scale); rather than 33.33% recurring.

We are also using the rounded down fineness, as opposed to the rounded to nearest whole number fineness. See table below for the difference.

Parts gold to alloy Percentage
(Round down)
(Round to nearest whole number)
24K 24 / 24 100 1000 1000
23K 23 / 24 95.83 958 958
22K 22 / 24 91.67 916 917
21.6K 21.6 / 24 90 900 900
21K 21 / 24 87.5 875 875
20K 20 / 24 83.33 833 833
19K 19 / 24 79.17 791 792
18K 18 / 24 75 750 750
17K 17 / 24 70.83 708 708
16K 16 / 24 66.67 666 667
15K 15 / 24 62.5 625 625
14K 14 / 24 58.33 583 583
13K 13 / 24 54.17 541 542
12K 12 / 24 50 500 500
11K 11 / 24 45.83 458 458
10K 10 / 24 41.67 416 417
9K 9 / 24 37.5 375 375
8K 8 / 24 33.33 333 333
7K 7 / 24 29.17 291 292
6K 6 / 24 25 250 250

For 24K gold, we offer 2 nines (990), 3 nines (999), 3 nines 5 (999.5), 3 nines 7 (999.7), 4 nines (999.9), 4 nines 5 (999.95), and 5 nines (999.99). See nine purity for more information.

Some manufacturers may stamp a particular karat but the fineness may vary slightly (for example, 14K gold which is 583 may be stamped 585).


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