Alloy Composition Calculator

Convert between weight percent and atomic percent for a three-element alloy system.

Element 1 Weight

Element 1 Atomic Mass

g/mol

Element 2 Weight

Element 2 Atomic Mass

g/mol

Element 3 Weight

Element 3 Atomic Mass

g/mol

Tab to move between fields

Element 1 Weight %

72.92 wt%

Element 2 Weight %

18.75 wt%

Element 1 Atomic %72.21 at%

Element 2 Atomic %19.94 at%

Element 3 Weight %8.33 wt%

Element 3 Atomic %7.85 at%

How to Use This Calculator

Enter the weight and atomic mass of Element 1 (e.g., iron: weight 70 g, atomic mass 55.845).
Set the weight and atomic mass of Element 2 (e.g., chromium: weight 18 g, atomic mass 51.996).
Optionally add Element 3 weight and atomic mass for ternary alloys.
The calculator outputs weight percent and atomic percent for each element.
Use the composition results to verify alloy specifications or design custom blends.

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