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18ct gold price per gram
Eighteen-carat gold is R1 651,48 per gram in South Africa at 27 Jul 2026, 13:48 SAST. It is 75% pure gold, so it carries 75% of the value of pure gold, gram for gram. It is the step up from everyday 9ct: twice as pure, twice the metal value, a richer colour, and used for fine jewellery.
| Weight | Fine gold | Metal value |
|---|---|---|
| 1 g | 0.75 g | R1 651 |
| 2 g | 1.50 g | R3 303 |
| 5 g | 3.75 g | R8 257 |
| 10 g | 7.50 g | R16 515 |
| 20 g | 15.00 g | R33 030 |
| 50 g | 37.50 g | R82 574 |
18ct = 75% gold · any weight →
18ct against 9ct
The only thing that separates the karats is how much gold is in the metal, and that decides both the price and the payout. 18ct is 75% gold, 9ct is 37.5%, so gram for gram 18ct is worth exactly twice as much: R1 651,48 against R825,74 today. It also wears softer and costs more new. South Africa leans to 9ct for everyday pieces because it is far cheaper; 18ct is the choice when colour and purity matter more than price. When you sell, the arithmetic is the same for both: weight times purity times the live price, then the buyer's percentage. Run yours through the calculator, or see the full board.
The Goldza desk
Common questions
18ct gold, answered
- What is the 18ct gold price per gram in South Africa today?
- 18ct gold is R1 651,48 per gram at 27 Jul 2026, 13:48 SAST. It is 75% pure gold, so it is worth 75% of the value of pure gold, gram for gram, exactly twice the value of 9ct.
- Is 18ct gold better than 9ct?
- 18ct is twice as pure as 9ct, 75% against 37.5%, so it is worth twice as much per gram (R1 651,48 versus R825,74) and has a richer colour and higher status. It is also softer and dearer. Neither is "better"; 9ct is the SA everyday standard, 18ct the step up for fine jewellery.
- How much is my 18ct gold worth?
- Weigh it and multiply by R1 651,48. A 10g 18ct piece holds 7.5g of pure gold and is worth R16 515 in metal; a buyer typically pays 70 to 90 percent of that.