How the premium on this page is measured
Every figure here is built from published rates and converted carefully. This page explains the process, its limits, and what a reader should not conclude from it.
Two prices, one unit
The Indian benchmark is quoted in rupees per ten grams, and the international price comes in dollars an ounce. Before anything is stored, both are converted to one gram. The dollar price is multiplied by the rupee-dollar rate, and the result is divided by the number of grams in an ounce. Only then can the two be compared directly. Without that conversion, a higher rupee figure would always look larger, no matter what the metal was actually doing.
The conversion uses the international price from two independent sources: a gold price in dollars an ounce and a dollar-rupee rate. Neither is taken from the domestic page. The domestic page is the India Bullion and Jewellers Association's published rate, which it announces twice on each trading day. That rate is a benchmark, not a shop's price, and it is the reference used for tax, for lending against jewellery and for buy-back counters.
Why the international price is never taken from the domestic page
The domestic page carries the association's rate in rupees for ten grams. The international page carries a dollar price per ounce. Taking both from the same page would mean converting one of them twice, and the result would be built on a single source. This site keeps them separate: the domestic rate comes from the association's own published table, and the international price comes from two independent sources, a gold price in dollars an ounce and a dollar-rupee rate.
The association quotes gold and platinum per ten grams and silver per kilogram. Every figure here is converted to one gram before anything is stored. The rates are read from the page by container, so the morning table and the afternoon table are separate, and a figure can never be taken from the wrong half of the page. The association's rates are published before tax; where this site shows what a buyer pays, the three per cent goods and services tax is added and labelled as such.
The band a premium has to fall inside
A reading whose domestic premium over the international gram falls outside a band of zero to twenty-five per cent is refused, and nothing is written that run. The band is not a judgment of what the premium should be; it is a sanity check. If the gap is negative, something is wrong in the conversion or the reading. If it is above twenty-five per cent, a source is likely stale or a figure has been misread.
A reading is also refused if the purity ladder does not fall with purity, or if the published rate is more than five days old. The purity ladder means that a lower purity must carry a lower price per gram; if it does not, the reading is discarded. The association does not publish on weekends or on holidays, so the most recent rate is sometimes a day or two old; the date it carries is shown rather than hidden.
Why a measured gap is not an opportunity
The premium measured here is the difference between a benchmark and a wholesale international price. It is not a price any reader can buy at. The international price is for metal delivered abroad, and the Indian benchmark is not a shop's quote. A buyer in India pays a shop's price, which includes making charges and the shop's own margin. Those are not published anywhere and are not estimated here.
A contract for difference, like the one offered by FxPro, is settled in the account's currency and carries no claim on any metal. It is not a way to buy gold at the international price and sell it in India. The premium cannot be captured by an individual buyer. What this site measures is a reference gap, useful for understanding the market, not for trading.