THE NUMBERS, EXPLAINED
How to use this calculator.
Unit weights are measured or supplied averages within each group. A metric carat is exactly 0.2 grams; no value or authenticity assessment.
Start with your inputs
Enter gemstone counts by parcel group, measured unit gemstone weight (carats). Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Gemstone counts by parcel group | 2,3 |
| Measured unit gemstone weight (carats) | 0.5,2 |
A worked example
With the example inputs above, parcel carats by group is 1, 6. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Parcel carats by group | 1, 6 |
| Total parcel weight (carats) | 7 |
| Total parcel mass (grams) | 1.4 |
How this is calculated
Parcel carats by group
Multiply stone counts by measured unit carats.
Total parcel weight (carats)
Sum group carat weights.
Total parcel mass (grams)
Convert carats to grams at 0.2 grams per carat.
Symbols and units
- a
- Gemstone counts by parcel group
- b
- Measured unit gemstone weight (carats)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions and limits
Unit weights are measured or supplied averages within each group. A metric carat is exactly 0.2 grams; no value or authenticity assessment.
Calculations use the values you enter. Blank or invalid inputs show an error instead of silently substituting zero. Results are displayed to useful precision; calculations retain the underlying numeric precision.
Questions about this tool
What does the result tell me?
Parcel carats by group; Total parcel weight (carats); Total parcel mass (grams). The result applies to the method and inputs described above. Check the units and assumptions before using it in a decision.
Why might another calculator differ?
Differences in units, rounding, timing or model definitions can produce different answers. Compare the input definitions and the method, rather than only the final number. For this tool: Unit weights are measured or supplied averages within each group. A metric carat is exactly 0.2 grams; no value or authenticity assessment.
Are my inputs stored or sent to AI?
Calculations on this page happen in your browser. The separate AI question finder sends its submitted conversation to OpenAI; these calculator fields are not sent. Favourites and recent tool names are stored locally. A shared link contains the inputs you choose to include.
Further reading
NIST Precious Metals Conversion Information ↗
Background reading; this does not imply endorsement or independent review of SumFizz.
Review status
Software example and browser checks are recorded in our quality report. No external expert review is claimed. Created with coding assistance; calculations run as ordinary browser code.
Read the quality report →