Calculate Gold Price per Gram
Use a 24K reference price and adjust it for the selected purity.
This is a purity-adjusted metal-value estimate based on the reference price entered above. It is not a guaranteed jewellery, dealer, buyback or investment price.
How to Calculate Gold Price per Gram
Gold is commonly quoted by weight, but the price depends on both the reference market price and the purity of the metal. A 24K reference represents very high-purity gold, while 22K, 18K and other jewellery alloys contain a lower percentage of pure gold.
This calculator uses the karat fraction to estimate the metal value per gram. If you enter a 24K reference price of 100 in your chosen currency and select 18K gold, the basic calculation uses 18/24 of that reference value.
For example, if the 24K reference is 100 per gram, nominal 22K metal value is approximately 100 × 22/24 = 91.67 per gram.
Gold Karat and Fineness Reference
| Karat | Nominal Gold Fraction | Fineness | Price Factor vs 24K |
|---|---|---|---|
| 24K | 24/24 | 100.00% | 1.0000 |
| 23K | 23/24 | 95.83% | 0.9583 |
| 22K | 22/24 | 91.67% | 0.9167 |
| 21K | 21/24 | 87.50% | 0.8750 |
| 20K | 20/24 | 83.33% | 0.8333 |
| 18K | 18/24 | 75.00% | 0.7500 |
| 14K | 14/24 | 58.33% | 0.5833 |
| 10K | 10/24 | 41.67% | 0.4167 |
| 9K | 9/24 | 37.50% | 0.3750 |
What Does Gold Price per Gram Actually Mean?
A gold price per gram is simply a price expressed for one gram of gold. It is useful because jewellery, coins, scrap and small gold items are often weighed in grams. However, the quoted price can refer to different things, so the source of the price matters.
24K reference price
This represents the reference price for high-purity gold. Market quotes may be based on spot prices, wholesale markets, local bullion markets or dealer quotations.
Purity-adjusted metal value
Lower-karat gold contains alloying metals as well as gold. Applying the karat fraction provides a simple theoretical metal-value comparison against the 24K reference.
Retail jewellery price
The amount a customer pays for finished jewellery can be substantially different from the underlying metal value. Manufacturing, design, labour, stones, taxes, wastage, retailer margins and brand premiums can all affect the final selling price.
Gold Price per Gram vs Jewellery Price
A common mistake is to treat a gold market price per gram as the final price of a jewellery item. They are not necessarily the same. The market reference describes the underlying metal, while a finished jewellery price may include several additional components.
For a simple metal-value estimate, multiply the purity-adjusted price per gram by the weight of gold. For an actual jewellery purchase, additional charges should be considered separately.
If a piece weighs 10 grams and the calculated 22K metal price is 91.67 per gram, the theoretical metal value is approximately 916.70 in the selected currency.
Factors That Can Change the Price You Actually Pay
Market price
Gold prices move as global markets change. Currency movements, interest-rate expectations, investor demand, central-bank activity and broader market conditions can influence quoted gold prices.
Purity
The gold fraction is one of the most important variables. Two jewellery pieces with identical weights can contain substantially different quantities of pure gold when their karats differ.
Making charges
Jewellery manufacturing requires labour, equipment, finishing, design work and sometimes specialized craftsmanship. These costs are separate from the basic metal value.
Wastage and manufacturing loss
Some jewellery pricing structures include a wastage or manufacturing allowance. The method varies between manufacturers and markets, so it should not automatically be treated as pure gold content.
Stones and other materials
Gemstones, diamonds, pearls, enamel and other components can add substantial value or cost to finished jewellery. Their value is not represented by a gold-per-gram calculation.
Taxes and commercial margins
Taxes, dealer spreads, retailer margins and other transaction costs can change the final amount paid by a customer or received when selling an item.
Using This Calculator for Gold Jewellery
To estimate the underlying gold component of jewellery, first determine the approximate gold weight and karat. Enter the appropriate 24K reference price, select the karat and enter the weight.
The result provides a useful baseline for comparing the underlying metal value with a quoted jewellery price. It should not be used by itself to determine whether a finished item is fairly priced, because workmanship and other components can materially affect the retail value.
Understanding Gold Fineness Numbers
Gold purity can also be expressed using fineness rather than karat. Fineness represents the amount of pure gold in parts per thousand. For example, a 750 fineness alloy contains approximately 750 parts gold per 1,000 parts of alloy, corresponding to 18K by the standard karat relationship.
Common markings include 999 or 999.9 for very high-purity gold, 916 or 916.7 for approximately 22K, and 750 for approximately 18K. Actual hallmarking standards can vary by jurisdiction and product.
Practical Uses for a Gold Gram Price Calculator
Compare gold quotes
Convert a high-purity reference price into a comparable purity-adjusted figure before examining other charges.
Estimate the metal component of jewellery
Use the weight and purity to estimate the underlying gold component before considering workmanship and other costs.
Check different karats
Compare theoretical metal values for 24K, 22K, 18K, 14K and other karat grades from the same 24K reference.
Estimate scrap metal value
A purity-adjusted metal estimate can provide a starting point for understanding the gold component of an item. Actual scrap-buying offers can differ because buyers apply their own refining costs, margins and testing procedures.
Important Limitations
This calculator does not fetch or guarantee a live gold market price. The result is only as current as the 24K reference price entered by the user.
It also does not identify gold purity. If the purity of an item is uncertain, the selected karat should not be treated as a verified assay result. Hallmarks can provide useful information, but testing may be required to establish composition with greater confidence.
Finally, the calculated figure is a metal-value estimate rather than an appraisal of a finished jewellery item. Design, condition, craftsmanship, brand, gemstones, provenance and market demand can all influence an item's actual commercial value.
Frequently Asked Questions
How do you calculate gold price per gram?
Enter a 24K gold reference price per gram and multiply it by the selected karat divided by 24. This gives a basic purity-adjusted metal-value estimate.
What is the formula for 22K gold price per gram?
Multiply the 24K price per gram by 22/24. This is equivalent to applying a nominal gold fraction of approximately 91.67%.
Is this the final jewellery shop price?
No. It estimates the underlying gold metal value. Finished jewellery can include making charges, taxes, stones, wastage, retailer margins and other costs.
How much pure gold is in 18K gold?
18K gold has a nominal gold fraction of 18/24, or 75%. The remainder consists of other alloying materials.
Can I enter a local gold market price?
Yes. Enter the 24K price per gram in the currency you want to use, provided that the quote represents the reference price you intend to compare.
Does the gold price change during the day?
Gold prices can move during the trading day. This calculator uses the reference price entered by you and does not provide a guaranteed live market quote.
Can I use this calculator for gold jewellery?
Yes, for estimating the underlying metal component. Enter the item's gold weight and approximate karat. Remember that the final jewellery price can include many additional costs.
Does a higher karat always mean a higher jewellery price?
A higher karat generally means a greater proportion of gold by weight, but the final jewellery price also depends on workmanship, design, stones, brand, taxes and other factors.