This calculator shows today's gold price per gram, in USD — refreshed three times a day from a live spot price. Whether you want to know the gold price per gram calculator result for an insurance valuation, or the cash-for-gold price to sell an old piece, start here and use the karat dropdown to match your item's stamp.
Looking for a specific karat? Jump straight to the 24K, 22K, 18K, 14K or 10K page, each with a dedicated calculator and karat guide.
Gold Price Per Gram — By Karat
24K Gold
Bullion & investment coins
22K Gold
Wedding & bridal jewelry
18K Gold
Engagement rings
14K Gold
America's everyday standard
10K Gold
Lowest karat sold as gold
Cash for Gold
Selling & buyer estimate
Methodology
Data source & formula
How This Calculator Works — Formula & Method
Source: live spot feed, converted via live FX rate · applied deterministically · see full methodology
price_per_gram(24k, GBP) = spot_price_per_troy_oz(GBP) / 31.1035
price_per_gram(karat, GBP) = price_per_gram(24k, GBP) × karat_fraction
price_per_gram(karat, USD) = price_per_gram(karat, GBP) × GBP_to_USD_rate
total_value = price_per_gram(karat, USD) × weight_in_grams
price_per_gram(karat, GBP) = price_per_gram(24k, GBP) × karat_fraction
price_per_gram(karat, USD) = price_per_gram(karat, GBP) × GBP_to_USD_rate
total_value = price_per_gram(karat, USD) × weight_in_grams
Live spot price and live FX rate, not an AI estimate — updated three times daily. This is an indicative price, not a dealer quote.
Frequently Asked Questions
The gold price per gram changes throughout the trading day. This calculator updates three times daily from a live spot price, so the figure shown is today's gold price per gram in USD, not a fixed historical value.
No. The price shown is the live spot rate — the wholesale market price. If you're looking to sell, pawn shops and gold buyers pay a discount to spot (see our cash-for-gold page), and the exact offer varies by buyer, purity and volume.
Gold's live feed here comes from a UK-based spot price provider, converted to USD using a live GBP-to-USD exchange rate. See our methodology page for the exact calculation and why this is disclosed rather than presented as a native USD feed.
In the US, gold jewelry is stamped directly with its karat — 24K, 22K, 18K, 14K or 10K — rather than a millesimal hallmark. 14K is the most common purity for everyday US jewelry; 10K is the lowest karat still legally sold as gold in most states.