Metal Conversions

10kt 14kt 18kt Plat Sterling
Wax11.6013.4015.5021.4510.40
10kt-1.131.321.880.90
14kt0.89-1.171.660.80
18kt0.760.85-1.420.68
Plat0.530.600.70-0.48
Sterling1.111.251.462.06-

This chart intended to provide a good indication within a reasonable tolerance. Left column is material converting from.

Convert wax to metal

wax model weight  x  factor of metal wanted  =  weight of metal wanted

example: 1.5 grams wax  x  10.40 (sterling silver factor) = 15.6 grams sterling silver

Convert metal to metal wanted

model weight in metal  x  factor of metal wanted = weight of metal wanted

example: 6.0 grams sterling silver  x  1.25 (14kt factor) = 7.5 grams 14kt gold

Specific Gravity Chart

Material Specific Gravity
Wax1
24kt gold (fine gold)19.32
18kt gold15.5
14kt gold13.4
10kt gold11.6
Palladium12.0
Platinum21.45
Rhodium12.44
Silver (fine silver)10.49
Sterling silver10.4

Weight Conversion

To convert:
pennyweights (dwt) to gramsmultiply by1.55518
grams to pennyweights (dwt)multiply by0.64301
ounces troy to gramsmultiply by31.1035
grams to ounces troymultiply by0.0321507