Gold Per Gram Value Calculator

Gold is priced per troy ounce on global markets, but jewelry, coins, and scrap are usually weighed in grams. To convert, divide the spot price by 31.1035 grams per troy ounce, then multiply by your weight and purity fraction. For example, if spot gold is $2,400 per troy ounce, one gram of pure 24K gold is worth about $77.16. A 10-gram 14K chain (58.3% pure) would carry a melt value of roughly $450, before any dealer fees or refining deductions are subtracted from the offer.

This calculator handles any spot price you input, so it stays accurate whether gold trades at $1,900 or $3,000 per ounce. Karat purity sets the gold fraction: 24K is 99.9%, 22K is 91.6%, 18K is 75%, 14K is 58.3%, and 10K is 41.7%. A 20-gram 18K ring at $2,400 spot would melt to about $1,157 in pure gold value. Dealers typically pay 70–90% of melt for scrap, so adjust expectations based on whether you sell to a refiner, pawn shop, or private buyer.

How it works: Enter the weight in grams, select karat purity, and input the current spot price per troy ounce. The calculator converts to grams, applies the purity fraction, and shows melt value plus typical dealer offer ranges.

Understanding Gold Pricing Per Gram in 2026

Gold's per-gram value depends on three variables: weight, purity, and the live spot price. Knowing how these interact helps you spot fair offers and avoid undervaluing your gold.

Gold value per gram by karat at common spot prices (2026)

Typical buyer payout percentages (% of melt value)

How spot price converts to per-gram value

The global gold spot price is quoted in US dollars per troy ounce, where one troy ounce equals 31.1035 grams. To find pure gold's per-gram price, divide spot by 31.1035. At $2,400/oz, that yields about $77.16 per gram of 24K gold. Rule of thumb: every $100 change in spot price moves the per-gram value of pure gold by about $3.22. For a 14K item (58.3% pure), the same $100 spot swing shifts per-gram value by roughly $1.88, so heavier and purer items react more dramatically to market movements.

Karat purity and what it actually means

Karat (K) measures gold content out of 24 parts. 24K is essentially pure gold (99.9%), while 14K is 14/24 or 58.3% gold mixed with copper, silver, zinc, or nickel for durability. US jewelry is commonly 10K or 14K; European pieces lean toward 18K; Indian and Middle Eastern jewelry is often 22K. Rule of thumb: multiply the karat number by 4.17 to get the approximate purity percentage. Always verify stamps with an acid test or XRF scan before selling — unmarked or mislabeled items can cost you 20–40% of expected value if assumed to be higher karat than actual.

Weighing gold accurately

Use a digital jewelry scale that reads to 0.1 grams or better — kitchen scales are too imprecise. Remove non-gold components like clasps, stones, or backings before weighing, or estimate and subtract their weight. A common guideline: gemstones and settings account for 5–15% of a ring's gross weight. Pennyweights (dwt) and troy ounces are also used in the trade: 1 dwt = 1.555 g, and 1 troy oz = 20 dwt. If a buyer quotes in dwt, multiply by 1.555 to convert to grams for apples-to-apples comparison with online spot calculators.

Melt value vs. resale value

Melt value is what your gold is worth as raw metal after refining. Resale value can be higher for designer pieces, antique items, or branded jewelry (Cartier, Tiffany, Rolex) — sometimes 2–5x melt. For generic chains, broken jewelry, or dental gold, expect offers near melt. Rule of thumb: if a piece has hallmarks, original packaging, or recognizable designer marks, get a second opinion from a jewelry appraiser before selling for scrap. Coins like American Eagles or Krugerrands also carry a numismatic premium of 3–8% over melt, depending on year and condition.

Why buyer payout percentages vary

Refiners with large volumes operate on thin margins and can pay 90–97% of melt because they process gold directly. Pawn shops and retail buyers need to cover overhead, marketing, and resale risk, so they pay less. A common guideline: get at least three quotes before selling. Online mail-in services (like Express Gold Cash or CashForGoldUSA) often pay 80–90% but add 5–10 business days of float. Local jewelers may match online quotes if asked. Avoid TV ads and mall kiosks — these are typically the lowest payers, sometimes offering 40–50% of melt.

Timing your sale around market cycles

Gold prices move daily based on inflation expectations, currency strength, central bank purchases, and geopolitical risk. In 2026, gold has traded in elevated ranges driven by sustained central bank buying and persistent inflation concerns. Rule of thumb: avoid selling on days when gold drops 2%+ in a single session — wait for a rebound. Track 30-day and 200-day moving averages on goldprice.org or kitco.com. If you must sell quickly, locking in a quote within hours protects you from intraday swings, especially on items worth over $1,000 where a 1% spot move equals $10+ per item.

Tax implications of selling gold

In the US, gold is classified as a collectible by the IRS, with long-term capital gains taxed up to 28% (vs. 15–20% for stocks). Short-term gains (held under one year) are taxed at ordinary income rates. Dealers must file Form 1099-B for sales over $10,000 cash, but smaller transactions still owe tax — you're responsible for reporting. Rule of thumb: keep purchase receipts for cost basis. If you inherited gold, your basis is the fair market value on the date of death, often eliminating most taxable gain. Consult a tax pro for sales above $5,000.

How This Calculator Works: Methodology & Parameter Explanations

Core formula: melt_value = weight_grams × (spot_price ÷ 31.1035) × (karat ÷ 24); dealer_offer = melt_value × (dealer_payout_pct ÷ 100)

Parameter explanations

Assumptions

The $30/gram or similar example numbers in any title or heading are illustrative defaults — the calculator works for any spot price you enter, from $1,000 to $10,000+ per troy ounce.

One troy ounce equals exactly 31.1035 grams (the international standard for precious metals).

Karat-to-purity conversions use industry-standard fractions: 10K=41.7%, 14K=58.3%, 18K=75%, 22K=91.6%, 24K=99.9%.

Melt value excludes any numismatic, designer, or antique premium — generic scrap pricing only.

Dealer payout percentages are estimates; actual offers depend on weight, location, condition, and negotiation.

Parameter meanings