Gold Price Calculator
Our gold price calculator is built for the way most people in the United States actually buy, sell, and value gold. Instead of forcing you to do purity conversions by hand, the tool takes a live spot price, applies the correct karat purity, and shows the estimated value in USD instantly. That makes it useful whether you are checking the value of old jewelry, pricing inherited gold, comparing scrap offers, or simply tracking how much a specific weight of gold is worth right now. You can enter weight in troy ounces, grams, pennyweight, or kilograms, switch between standard karat options like 10K, 14K, 18K, 22K, and 24K, or enter a custom purity percentage when you need something more exact. The calculator also explains the formula so you can verify the math instead of relying on a black-box estimate. For American users who want a clean gold value calculator with live spot pricing and no signup wall, this page is designed to be the fast, practical option.
Calculator tool
All calculations run instantly in your browser. Live price can be overridden any time.
Estimated gold value
$0.00
Formula breakdown
Weight × purity × spot price = value
How it works
First, the calculator converts your chosen weight unit into a standard pricing basis. Spot gold is usually quoted in USD per troy ounce, so grams, pennyweight, and kilograms must be converted before the final value is calculated.
Next, the tool applies the purity factor. A 24K item is treated as pure gold, while 14K is 58.5% pure and 10K is 41.7% pure. This matters because most jewelry is an alloy, not 100% gold.
Finally, the calculator multiplies the converted weight by the purity percentage and the live spot price. The result is an estimated intrinsic value, which is useful for melt value, negotiations, and comparison shopping.
Because the live price is editable, you can also test “what if” scenarios. That helps buyers, sellers, and investors compare quotes or see how a small move in spot gold changes value.
Formula
Gold value = Weight in troy ounces × Purity decimal × Spot price per troy ounce
Example calculation
- Example item: 20 grams of 14K gold
- Convert 20 grams to troy ounces: 20 × 0.0321507 = 0.6430 ozt
- Convert 14K to purity: 14 ÷ 24 = 0.585
- If spot gold is $3,250.40/ozt, value = 0.6430 × 0.585 × 3,250.40 = about $1,222.69
Current karat price table
Live from the cached spot feed. Use these rows as a quick reference before you calculate.
Updated 11 min ago
| Karat | Purity | Per Gram | Per DWT | Per Ozt |
|---|---|---|---|---|
| 10K | 41.7% | $61.58 | $95.78 | $1,915.50 |
| 14K | 58.3% | $86.22 | $134.09 | $2,681.70 |
| 18K | 75% | $110.85 | $172.40 | $3,447.90 |
| 22K | 91.7% | $135.48 | $210.71 | $4,214.10 |
| 24K | 100% | $147.80 | $229.86 | $4,597.20 |
FAQ
Is this gold price calculator using live prices?
Yes. The calculator loads the latest cached spot price from our public gold price endpoint, which is updated every 10 minutes by cron.
Why is my jewelry offer lower than the calculator result?
The calculator shows estimated intrinsic value based on gold content. Real buyers still apply testing risk, refining cost, margin, and payout percentage.
Should I use grams or pennyweight?
Use whichever unit your scale shows. The tool converts grams, dwt, kilograms, and troy ounces automatically.
Can I enter custom purity?
Yes. Choose the custom option and enter a percentage if you have assay data or a non-standard alloy.
Does this include gemstones or brand value?
No. This tool estimates gold content only. Designer markup, antique value, and stones must be evaluated separately.
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Need a quick sell-price estimate?
If you are checking what a buyer might actually pay, move over to the scrap gold calculator and compare payout percentages side by side before you accept an offer.