How to Use Gold Calculator

Step 1: Weigh Your Gold

For the calculator to work, you need a realistic weight for your gold. Use a digital scale if possible.

Choose the right scale

A jewelry scale that measures in grams to two decimal places is ideal. A kitchen scale can work for heavier pieces but is less precise for small items like thin rings or earrings.

Weighing tips

• Zero (tare) the scale before you start.
• Weigh only the gold—remove boxes, bags, and any heavy packaging.
• If possible, weigh different karats (10K, 14K, 18K) separately.
• For very small pieces, place a light container on the scale, tare it, then add the items.

Don't worry about being perfect to the last 0.01g. A small difference in weight only changes the result by a small amount. The goal is a solid estimate, not a lab measurement.

Step 2: Identify Purity (Karat)

The calculator needs to know how pure your gold is. This is shown as karat (K) or a three-digit number stamp.

Look for stamps such as 10K, 14K, 18K, 22K, 24K, or numbers like 417, 585, 750, 916. These are usually inside rings, near the clasp on chains and bracelets, or on the back of pendants and earrings.

If you're not sure what a number means, see our Gold Karat Guide for a full chart that converts stamps (like 585) into karat (14K) and explains typical uses for each purity.

What If You Can't Find a Stamp?

Some older pieces, repairs, or imported jewelry may not have a clear hallmark. In that case, it's better to be cautious than to assume a high purity.

• Double-check all likely stamp areas with good lighting and, if you have one, a small magnifying glass.
• If you still can't find a mark, you can have a jeweler or gold buyer test the piece for you.
• You can also try simple at-home checks, but they are not 100% reliable.

If you decide to use the calculator without a confirmed stamp, it's safer to choose a lower karat (for example 10K or 14K instead of 18K or 22K). This keeps your expectations realistic and makes it easier to be pleasantly surprised instead of disappointed.

Step 3: Use the Calculator

With your weight and karat ready, you can now use the calculator to see your gold's melt value.

1. Select your unit (grams, ounces, etc.). Grams are usually the easiest.
2. Enter the weight of your gold in that unit.
3. Choose the correct karat or purity from the list.
4. Run the calculation to see the estimated market value.

The calculator uses the current gold price per gram for your chosen purity to estimate melt value—what your gold is worth as raw metal before any buyer discounts or fees.

The calculator above has fields for weight, unit, and purity. Enter your numbers and read the result; you can add a screenshot here later to show exactly where to type weight and how to select karat.

Gold Calculation Formula

Market Value = Weight (grams) × Price per Gram (for your purity)

Example: 10 grams of 14K gold at $38/gram = $380 market value. Buyers typically pay 70–90% of this, depending on whether you're dealing with a pawn shop, local gold buyer, or online buyer.

Why Calculator Results and Real Offers Are Different

The calculator shows a fair estimate of melt value using live gold prices. Real-world buyers pay less than this because they need to cover refining costs, business expenses, and profit.

• Pawn shops often pay around 70–80% of melt value.
• Local gold buyers and jewelers may pay 75–90% depending on competition.
• Online buyers and refineries can sometimes pay even more for larger amounts.

Think of the calculator result as your benchmark. If an offer is slightly below it, that's normal. If an offer is far below it, that's a warning sign that you should get another quote.