Gold reference & calculators
A dated reference price, a unit converter, and a karat purity-adjusted value calculator. No live quotes, no buy/sell recommendations.
Gold reference price Reference
A single dated snapshot, not a live quote — gold trades continuously and this number will already be out of date by the time you read it.
| Metal | Price (USD / troy oz) | As of | Source |
|---|---|---|---|
| Gold | $4,284.20 | Sep 25, 2026, 5:00 PM EST | Kitco — Precious Metals |
Source: Kitco.com, "Precious Metals" price page, accessed Sep 26, 2026 — the page displayed a New York spot bid of $4,284.20/troy oz timestamped September 25, 2026, 5:00 PM EST. Kitco's own timestamp lags real-time by a few minutes and can differ slightly from other dealers' quoted spreads.
Unit converter
Convert between the units gold is commonly weighed in worldwide. Conversions use exact/standard trade-weight definitions, not rounded factors.
Purity-adjusted value calculator
Price a given weight of gold at a chosen karat, using the reference price above (editable) as the pure-gold (fine) price.
"Purity-adjusted" means only the fine-gold content is priced — it ignores making charges, dealer premiums, or resale/buyback spreads, which can move the real-world price well away from this figure.
How karat / purity works
Gold purity is measured in karats, "parts fine gold per 24 parts total weight." 24-karat gold is defined as at least 99.95% pure for commercial purposes; 22-karat is 22⁄24 = 91.66% pure; 18-karat is 18⁄24 = 75% pure; 14-karat is 14⁄24 ≈ 58.33% pure. The remaining weight is other metals (commonly silver, copper or zinc) alloyed in to change color, hardness or cost. Bullion bars and coins increasingly quote a millesimal fineness (e.g. ".999") instead of a karat number, but the two describe the same thing.
Source: Wikipedia — Karat (purity), accessed Sep 26, 2026.
Troy ounce vs. regular ounce
The "troy ounce" used for gold, silver, platinum and palladium is not the same as the everyday (avoirdupois) ounce used for food or body weight. A troy ounce is exactly 31.1034768 grams, defined from a grain of exactly 0.06479891 grams with 480 grains to the troy ounce — about 9.7% heavier than an avoirdupois ounce (28.3495 g). Troy weight has been the standard for precious-metals trading worldwide for centuries, even in countries that otherwise use the metric system for everything else.
Source: Wikipedia — Troy weight, accessed Sep 26, 2026.
Tola, tael & baht — regional gold weights
Outside troy-ounce markets, gold is commonly traded in local trade-weight units. The tola is a South Asian unit standardized in 1833 at 180 grains (11.6638038 g, exactly 3⁄8 troy oz) and is still the everyday unit for gold bars and jewelry across South Asia and much of the Gulf, where ten-tola bars are a common trading size. The tael is a Chinese-origin unit used in gold and silver exchanges across parts of East and Southeast Asia — this calculator uses the Hong Kong Chinese Gold & Silver Exchange Society's definition of the unit. The baht is Thailand's traditional gold-trade weight; the Thai Gold Traders Association defines bullion baht at 15.244 grams, distinct from the slightly lighter jewelry-baht definition sometimes used domestically. Use the converter above to move between any of these and grams, kilograms or troy ounces.
Sources: Wikipedia — Tola (unit), Wikipedia — Tael, Wikipedia — Baht (unit), all accessed Sep 26, 2026.
Frequently Asked Questions
Is the price on this page live?
No. It's a single dated snapshot pulled from Kitco's public precious-metals page and clearly timestamped above. Gold trades nearly around the clock, so treat it as a reference point for the calculators, not a quote you can transact at.
Why is my purity-adjusted value different from what a jeweler quotes me?
This calculator only prices the fine-gold content at the reference rate you enter. Real-world prices also include making/labor charges, a dealer's margin, local taxes, and a buyback spread — none of which this tool models.
What is the gold/silver ratio and where can I calculate it?
It's how many troy ounces of silver it takes to equal the price of one troy ounce of gold. See the silver page for that calculator and a short explanation.