18K gold is 75% pure — a step up from the 14K standard common in the US. Its value per gram is today’s live gold price multiplied by that purity, updated automatically below. It’s a popular choice for fine jewelry and watches, prized for a richer color and higher gold content while still holding up to daily wear.
| Weight | Value |
|---|---|
| 1g | $107.60 |
| 5g | $538.00 |
| 10g | $1,076.01 |
| 20g | $2,152.01 |
| 50g | $5,380.04 |
| 100g | $10,760.07 |
Have a specific item to value? Use the Gold Calculator to enter its exact weight, or see 14K Gold Price Per Gram to compare against the more budget-friendly 14K standard.
18K has more pure gold (75% vs 58.3%) and a richer color, but is softer and more expensive. 14K is more durable and affordable for everyday wear. Neither is objectively 'better' — it depends on your priorities.
18K gold is more resistant to tarnishing than lower karats because it contains less reactive alloy metal, though white gold varieties may need occasional rhodium replating regardless of karat.
It depends on the ring's weight — multiply its weight in grams by today's 18K price per gram above, or use the Gold Calculator to enter the exact weight for a precise figure.