Gold Price Per Ounce by Karat
| Karat | Purity | Price / Ounce | Change |
|---|---|---|---|
| 24K | 99.9% | $4,580.97 | ▲ +$69.86 (+1.55%) |
| 22K | 91.7% | $4,199.22 | ▲ +$64.04 (+1.55%) |
| 18K | 75.0% | $3,435.73 | ▲ +$52.39 (+1.55%) |
| 14K | 58.3% | $2,672.23 | ▲ +$40.75 (+1.55%) |
| 10K | 41.7% | $1,908.74 | ▲ +$29.11 (+1.55%) |
Gold Price Per Ounce — Chart
Gold Price Per Ounce by Weight
| Weight | 24K Price | Change |
|---|---|---|
| 1/10 oz | $458.10 | ▲ +$6.99 |
| 1/4 oz | $1,145.24 | ▲ +$17.47 |
| 1/2 oz | $2,290.49 | ▲ +$34.93 |
| 1 oz | $4,580.97 | ▲ +$69.86 |
| 2 oz | $9,161.94 | ▲ +$139.72 |
| 5 oz | $22,904.85 | ▲ +$349.30 |
| 10 oz | $45,809.70 | ▲ +$698.60 |
| 1 Kilo (32.15 oz) | $147,281.39 | ▲ +$2,246.05 |
Understanding the Gold Price Per Ounce
The gold spot price is quoted per troy ounce, not a regular (avoirdupois) ounce. A troy ounce equals 31.1035 grams, while a standard ounce equals 28.3495 grams. The troy ounce is approximately 10% heavier than a regular ounce, and this distinction matters when calculating the value of gold.
The troy ounce has been the standard unit for weighing precious metals since the Middle Ages. When you see gold quoted at $$4,580.97 per ounce, that always means per troy ounce. Every exchange, dealer, and pricing service in the world uses this same standard.
If you need to convert between troy ounces and other units, the math is straightforward. Multiply by 31.1035 to get grams, or multiply by 0.0311035 to convert grams back to troy ounces. A troy ounce is approximately 10% heavier than a regular avoirdupois ounce (28.3495 grams). For gram-based pricing, visit our gold price per gram page which updates live alongside this page.
Gold Price Per Ounce to Price Per Gram
To convert the gold price per ounce to the price per gram, divide by 31.1035. At today's spot price of $$4,580.97 per troy ounce, one gram of pure 24K gold is worth $$147.28. This conversion applies to any karat — just multiply the per-gram result by the karat fraction.
For live per-gram pricing across all karats, weights, and a built-in calculator, visit our gold price per gram homepage.
Frequently Asked Questions
What is the gold price per ounce today?
The gold price per ounce today is approximately $$4,580.97 USD based on the live spot price. This price is quoted per troy ounce (31.1035 grams) and updates every 60 seconds during market hours. The daily change is +$$69.86 (+1.55%).
How many grams in a troy ounce of gold?
One troy ounce of gold equals exactly 31.1035 grams. The troy ounce is the standard unit used worldwide to weigh and price precious metals including gold, silver, platinum, and palladium. It is heavier than a regular avoirdupois ounce, which equals 28.3495 grams.
Why is gold measured in troy ounces?
Gold is measured in troy ounces because the troy weight system has been the established standard for precious metals trading since the Middle Ages. The system originated in Troyes, France, an important medieval trading center. Today, every major exchange and dealer worldwide quotes gold prices in troy ounces, ensuring a universal standard for the global market.
What is the difference between a troy ounce and a regular ounce?
A troy ounce weighs 31.1035 grams while a regular (avoirdupois) ounce weighs 28.3495 grams. The troy ounce is approximately 10% heavier. When gold prices are quoted "per ounce," they always mean per troy ounce. Using the wrong ounce in calculations would result in a roughly 10% error in value.