⚖️ Karat & Solder Calculator
Change the karat of a metal
Result
Mix up to 4 lots – what karat do you get?
WeightKarat
Result
1 · Suggested solder karat
2 · Make your own solder
Check final melting range with your supplier's specs before use.
3 · How much solder does the joint need?
Volume = length × seam width × gap. Densities are typical values; edit if your alloy differs.
Karat ⇄ fineness
| Karat | Pure gold | Common mark |
|---|---|---|
| 8K | 33.3% | 333 |
| 9K | 37.5% | 375 |
| 10K | 41.7% | 417 |
| 14K | 58.3% | 585 |
| 18K | 75.0% | 750 |
| 22K | 91.7% | 916 |
| 24K | 100% | 999 |