Gold Calculator
Find the melt value of gold, silver or platinum. Enter the weight, pick the karat or purity, and set the spot price (pre-filled and editable). You'll get the intrinsic metal value, a realistic dealer offer, and a price-per-gram-by-karat table — switch the unit to pennyweight to match a pawn-shop quote.
Spot pre-filled from $4,128.28/ozt on 2026-06-23 — edit it to today's price for an exact figure.
$774.20 melt value
Dealer offer at 85%: $658.07 · Pure gold: 5.833 g (0.188 ozt)
Per gram of this item: $77.42 · Pure gold/g: $132.73
Price per gram by karat (at $4,128.28/ozt)
| Karat | Purity | $ / gram | $ / dwt | $ / ozt |
|---|---|---|---|---|
| 24K | 99.9% | $132.59 | $206.21 | $4,124.15 |
| 22K | 91.67% | $121.67 | $189.22 | $3,784.39 |
| 18K | 75% | $99.55 | $154.81 | $3,096.21 |
| 14K | 58.33% | $77.42 | $120.40 | $2,408.03 |
| 10K | 41.67% | $55.31 | $86.01 | $1,720.25 |
| 9K | 37.5% | $49.77 | $77.41 | $1,548.10 |
Melt value is the intrinsic metal worth; what a buyer pays is a percentage of it. Spot prices move constantly — confirm the live price before selling. How we calculate →
How gold value is calculated (weight → troy ounces → purity)
Three numbers set the value of any gold, silver or platinum item: its weight, its purity, and the current spot price per troy ounce of the pure metal. The calculator converts your weight to grams, multiplies by the purity to get the pure-metal content, then multiplies that by the spot price per gram (spot ÷ 31.1035). The result is the melt value — the intrinsic worth of the metal itself.
The spot field is pre-filled with a real price (2026-06-23) and is fully editable — paste today's live price for an exact figure, because metal prices move every minute the markets are open.
Gold price per gram, pennyweight and troy ounce by karat
Jewelry is rarely pure. 14K is 58.3% gold (stamped 585), 18K is 75% (750), 10K is 41.7% (417), and 24K is ~99.9%. The per-karat table above takes the current spot price and shows the value of one gram, one pennyweight and one troy ounce at each karat, so you can sanity-check any quote. US pawn shops and jewelers often weigh in pennyweight (DWT) — 1 dwt = 1.555 g = 1/20 of a troy ounce — so switch the unit to dwt to match their math exactly.
Melt value vs. what dealers actually pay
Melt value is the ceiling, not the offer. Buyers deduct refining, assaying, shipping, insurance and their margin, so most reputable dealers pay 70–90% of melt for scrap — higher karats and larger lots get the better end. Use the dealer payout % input to see the realistic offer next to the full melt value, and shop two or three buyers; the spread between a 70% and a 90% offer on the same item is real money.
Troy ounces vs. regular ounces
Precious metals are always priced in troy ounces (31.1035 g), which are about 10% heavier than the standard (avoirdupois) ounce of 28.35 g used for food and postage. If you weigh gold on a kitchen scale set to ordinary ounces, you'll undercount — the calculator's unit selector handles the conversion, but make sure you pick the unit your scale is actually using.
One calculator for gold, silver and platinum
Switch the metal toggle and the spot price and purity presets update for that metal — sterling silver (.925), coin silver (.900) and fine silver (.999), or platinum Pt950/Pt900. The melt math is identical across metals: pure-metal weight × spot per gram. That makes this a single tool for valuing a mixed jewelry box or a bullion holding without jumping between sites.
Frequently asked questions
How do I calculate the value of 14K gold?
14K gold is 58.33% pure (stamped 585). Convert the weight to troy ounces, multiply by 0.5833 to get the pure-gold content, then multiply by the spot price per troy ounce. For example, 20 g of 14K = 11.67 g pure = 0.375 ozt — at a spot near $4,128/ozt that's about $1,548 of melt value.
How much is a gram of gold worth today?
Pure 24K gold per gram equals the spot price per troy ounce divided by 31.1035. At a spot around $4,128/ozt that's roughly $133 per gram for 24K; scale it down by purity for jewelry (×0.75 for 18K, ×0.583 for 14K, ×0.417 for 10K). Edit the spot field above to today's price for an exact number.
What is the difference between a troy ounce and a regular ounce?
A troy ounce is 31.1035 grams — about 10% heavier than a standard (avoirdupois) ounce of 28.35 grams. Gold, silver and platinum are always quoted and weighed in troy ounces, so don't use a kitchen scale's ordinary ounces or you'll undercount the metal.
Why do dealers pay less than melt value?
Buyers have to refine, assay, ship and insure the metal and still make a margin, so they pay a percentage of melt rather than the full intrinsic value. Most reputable buyers pay 70–90%, with higher-karat gold and larger lots earning the higher end. Use the dealer-payout slider to model a realistic offer.
How do I know what karat my gold is?
Look for a stamp: 585 = 14K, 750 = 18K, 417 = 10K, 999 = 24K (sterling silver is stamped 925). If it's unstamped, an acid test kit or an electronic tester confirms it; when unsure, assume the lower karat so you don't overvalue the piece.
What is a pennyweight (DWT) and why do pawn shops use it?
A pennyweight is 1.555 grams, or 1/20 of a troy ounce. Many US jewelers and pawn shops weigh gold in DWT when making an offer, so converting your grams to pennyweight (switch the unit above) lets you check their figure against the same spot price.
Researched & verified by the Calcuris Data & Research Team. How we build and check our tools →