Gold Price Calculator
Calculate the value of gold by weight and purity using current spot prices. Convert between grams, ounces, and troy ounces.
Gold Value by Weight
Enter the weight and purity to calculate the gold value.
Gold Price Per Gram by Karat
See the price per gram for every common karat level at the current spot price.
Gold Weight Converter
Convert gold weight between different units and see the value in each.
Formula
1 troy oz = 31.1035g | 1 oz = 28.3495g | 1 dwt = 1.555g | 1 kg = 1000g
Frequently Asked Questions
How much is gold worth per gram?
What is a troy ounce vs regular ounce?
Where can I find the current gold spot price?
Understanding Gold Pricing
Gold is priced internationally in US dollars per troy ounce on commodity exchanges. The spot price represents the current market price for immediate delivery and fluctuates constantly during trading hours based on supply and demand, currency movements, interest rates, and geopolitical factors. The London Bullion Market Association (LBMA) sets the gold fix twice daily, which serves as a benchmark for the global market.
When calculating the value of gold items, it is essential to convert to grams first and then apply the karat purity. A troy ounce equals 31.1035 grams -- about 10% more than a standard (avoirdupois) ounce. Pennyweights (dwt), used traditionally by jewelers in the US, equal 1.555 grams. Using the wrong unit conversion can lead to significant valuation errors.
Physical gold carries a premium above the spot price, known as the "over spot" premium. Gold bars carry premiums of 1-5% over spot, while coins (American Eagle, Krugerrand) carry 3-8% premiums. Gold jewelry carries the largest premium due to design and craftsmanship costs, but sells at a discount to melt value due to refining costs.