How Is the Gold Price Calculated? From the Ounce to 18K Gold

This guide explains everything about gold price calculated that you need for a good decision, with examples.

The gold price in Iran is not arbitrary: it follows two variables almost entirely — the global ounce price and the free-market dollar. When either moves, the price per gram moves too.

The price-per-gram formula

Price per gram = ounce price × free-market dollar ÷ 31.1035 × purity

31.1035 is the number of grams in a troy ounce. Purity is the share of pure gold: 0.750 for 18K, 0.875 for 21K, 0.9167 for 22K and 0.999 for 24K.

Example

With gold at $3,700 an ounce and the dollar at 105,000 Toman: 3,700 × 105,000 ÷ 31.1035 × 0.75 ≈ 9,370,000 Toman per gram of 18K gold. The market price can differ slightly because of local supply and demand; EZRate compares both.

From raw gold to jewellery prices

• Making charge: a percentage of the gold value that depends on the craftsmanship (a few percent for plain pieces, over 20% for fine work).
• Seller’s profit: usually around 5–7% of gold plus making charge.
• VAT: charged only on the making charge and profit, not on the gold.

That is why two rings of the same weight can cost very different amounts. The calculator on EZRate’s gold page breaks these components down.

Mesghal and the “mazaneh” quote

Wholesale gold is quoted per mesghal. One melted mesghal equals 4.3318 grams of 18K gold, so dividing the quote by 4.3318 gives the price per gram of 18K gold.

Why the Iranian gold price differs from the formula

The formula gives the world value of the gold, but the price traded in Tehran is sometimes above or below it. That gap is the gold bubble, shown on the 18K gold page next to the market price. On hectic days, or when the market expects a weaker rial, the market runs ahead of the formula; on calm days it lags.

Three numbers to watch every day

• Gold ounce: the world benchmark in US dollars.
• Free-market dollar: every move passes straight to the price per gram.
• Gold mesghal: the price of melted gold in the Tehran bazaar.

From the price per gram to jewellery

A shop price includes the raw gold value, the making fee, the seller’s profit and VAT on the fee and profit. The calculator on the 18K page works all of this out with live prices, so you know what a fair invoice is before buying. For saving, melted gold and coins have no making fee and are usually better value.

Frequently asked questions

• Why does the gold price move less at night? The Tehran market trades less at night, so the price mostly follows the world ounce and the dollar; the last real price is shown with its update time.
• How is the 24K gold price calculated? With the same formula and 0.999 instead of 0.75 — about 1.33 times the 18K price per gram.
• Does the gold price differ between cities? Only slightly, mostly because of making fees and seller profit; raw gold follows the ounce and the dollar everywhere.

Summary

The gold price in Iran is built from two numbers: the world ounce and the free-market dollar. Follow both, know the bubble, and you can work out a fair price for any karat yourself and avoid buying at the peak of market excitement. The live prices on EZRate are refreshed every minute, so the same calculation is always one glance away.

Following gold and coins on EZRate

The live the 18K gold, Emami coin and gold ounce rates are refreshed every minute from real market trades. Star any rate to add it to «My watchlist» on the home page, set a free e-mail, Telegram or browser alert for your target price, and convert any amount to Toman with the converter. The EZRate Telegram channel also posts the main rates several times a day.

Important note

This article is for education only and is not buy or sell advice. Iran’s currency, gold and crypto markets can move a lot in a short time; before any financial decision check the live rate, weigh your own risk and stay away from unknown traders and guaranteed-profit offers.