Why USD Here Is Derived, Not a Native Feed
This site's live gold price does not come from a US-dollar spot feed directly. It reads the already-published gold price from our sister site, Gold Price Per Gram UK (in turn sourced from goldapi.io, GBP), and converts it to USD using a live GBP→USD exchange rate from frankfurter.dev (European Central Bank reference rates, no API key required). We disclose this rather than presenting the USD figure as if it came from a native dollar feed — it's a two-step calculation, and the accuracy of the USD price depends on both the UK site's gold price and the FX rate being current.
Update Frequency
The gold spot price refreshes three times per day. The GBP→USD rate is sourced from the ECB, which publishes new reference rates once per working day (around 16:00 CET) — so on a typical day, our 3x/day polling of the FX rate mostly re-reads the same daily figure, while the gold spot price itself still updates three times. Every page shows the exact "Last refreshed" timestamp of the price data currently displayed. If either upstream source is temporarily unavailable, the site falls back to the last known value for that component specifically and shows a clear "using cached rate" banner, rather than a broken or zeroed page.
Calculation Formula
price_per_gram(karat, GBP) = price_per_gram(24k, GBP) × karat_fraction
price_per_gram(karat, USD) = price_per_gram(karat, GBP) × GBP_to_USD_rate
cash_estimate(karat, USD) = price_per_gram(karat, USD) × buyer_discount_factor
Karat Fractions Used
| Karat | Stamp | Fine gold fraction |
|---|---|---|
| 24K | 24K | 1 |
| 22K | 22K | 0.9167 |
| 18K | 18K | 0.75 |
| 14K | 14K | 0.585 |
| 10K | 10K | 0.417 |
Cash-for-Gold Discount
The cash-for-gold estimate applies a configurable discount factor (currently 0.85) to the live per-gram USD price. This is explicitly an estimate, not a market rule — real pawn shop and gold-buyer offers vary by karat, weight sold and the individual buyer. Always get a real quote before selling.
Who Runs This Site
Gold Price Per Gram USA is an independent calculator site, and the US-market companion to Gold Price Per Gram UK. It is not a dealer, refiner or financial adviser, and prices shown are indicative only — always confirm with a buyer or jeweler before any transaction.