Mix Two Gold Karats
Find the mass ratio and final batch amounts.
A two-alloy mixture can only reach targets between the two starting karats, inclusive.
The Formula Behind Karat Mixing
Karat is treated as a fine-gold fraction: karat ÷ 24. The mixture must preserve the correct total fine-gold mass.
With the final batch weight specified, the two unknown quantities can be solved directly.
When Two-Karat Mixing Is Possible
Example: 22K + 14K to Make 18K
For a 100 g final batch, the calculation produces a mass ratio that gives the required 18/24 fine-gold fraction.
A + B = 100
The exact quantities are calculated by the tool without relying on a rounded shortcut ratio.
Important Metallurgical Limitation
Karat mixing is a gold-content calculation. It does not account for the individual non-gold metals already present in the starting alloys, nor does it determine color, hardness or casting behavior.
Frequently Asked Questions
Can two gold karats be mixed to create another karat?
Yes, when the target lies between the two starting karats.
Can 18K and 14K make 16K?
Yes. 16K lies between 18K and 14K.
Can I mix two alloys to make 24K?
Only a mixture containing 100% fine gold can reach 24K.
What if the target is outside the starting range?
A two-component mixture cannot reach it.
Does this account for individual alloy metals?
No. It only balances fine-gold content.