Gold Gram Calculator
Gold gram calculator with karat purity and spot. Metric-first math for jewelry scales — convert cleanly when a scrap ticket still uses DWT instead.
Gold Value Calculator
Current 14K price · —/gram · —/oz
Using live market spot for this calculation.
Formula: weight × karat multiplier × spot price. 14K = 0.583
Most jewelry scales speak grams. Spot still lives in troy ounces. That translation is where phone-calculator mistakes breed.
Someone quotes a per-gram number without saying whether it's pure gold or 14K jewelry grams — and two people leave thinking they agreed.
This gram calculator keeps weight in grams, applies purity, and ties the result to spot so per-gram talk means one thing.
Per-gram: pure vs jewelry
Pure gram price ≈ spot ÷ 31.1035.
Jewelry gram price ≈ pure gram price × (karat ÷ 24).
If a buyer says "$95 a gram" for 14K, that's jewelry grams. If they say "$95 a gram fine," that's a different sentence. Ask which one you heard.
Sister page for pure/alloy per-gram views: gold price per gram calculator.
From scale to dollars
- Weigh dry metal in grams.
- Confirm karat or fineness.
- Fine grams = weight × purity.
- Fine grams × (spot ÷ 31.1035) = melt-style value.
Or: jewelry grams × (pure gram × purity).
Stones and steel findings inflate grams. Pull what you can. Hallmarks help: gold purity hallmark chart.
Gram reference at EXAMPLE spot
EXAMPLE spot: $4,000 / troy oz (illustrative) → pure ≈ $128.60 / g.
| Karat | Purity | ≈ $/g jewelry at EXAMPLE spot |
|---|---|---|
| 10K | 0.417 | $53.63 |
| 14K | 0.583 | $74.97 |
| 18K | 0.750 | $96.45 |
| 21K | 0.875 | $112.53 |
| 22K | 0.917 | $117.88 |
| 24K | 0.999 | $128.47 |
EXAMPLE — 25 g of 14K
EXAMPLE pure gram = $128.60; 14K ≈ $74.97 / g.
Lot: 25 g confirmed 14K scrap.
Fine grams ≈ 25 × 0.583 = 14.575 g
Melt-style ≈ 14.575 × 128.60 ≈ $1,874.
In DWT: 25 ÷ 1.55517 ≈ 16.08 DWT. Same lot should match a DWT ticket within rounding — if it doesn't, fix the unit before you argue price. DWT side: gold pennyweight calculator.
When gram math still fails
Wrong karat. Gold-filled marked like solid. Wet weigh-ups. Averaging mixed karats into one per-gram rate.
Gram precision on a cheap scale can also fake confidence — 0.1 g error on a tiny stud is noise; on a 200 g lot it's real money. Tare the pan. Zero often.
Formula background: how to calculate gold value.
Related tools and guides
- Goldcalculator
- all gold calculators
- gold pennyweight calculator
- gold ounce calculator
- gold price per gram calculator
- pennyweight vs grams vs troy ounce
- 14K gold calculator
Frequently Asked Questions
How do I convert spot per ounce to per gram?
Divide by 31.1035. That's grams per troy ounce.
Is "price per gram" always pure gold?
No. Ask. Jewelry grams and fine grams get conflated constantly.
How many grams in a DWT?
About 1.55517 g.
Can I use this for filings?
Yes if karat is known. Mixed bench dust needs assay — see bench filings gold value.
Why is my offer under the gram estimate?
Testing, refining, and margin. Fuzzy stamps widen the gap.
Grams or milligrams for tiny pieces?
Use what the scale displays reliably. Don't invent precision the scale can't deliver.
Disclaimer
Gram estimates assume the purity and dry weight you enter. Educational melt-style math — not settlement.