THE NUMBERS, EXPLAINED
How to use this calculator.
Scenario arithmetic using your assay, price and deduction quote. It provides no valuation, tax treatment or recommendation to transact.
Start with your inputs
Enter scrap mass (grams), supplied recoverable-metal assay (%), entered metal price (currency/gram), refiner percentage deduction (%), fixed refining charge (currency). Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Scrap mass (grams) | 100 |
| Supplied recoverable-metal assay (%) | 80 |
| Entered metal price (currency/gram) | 2 |
| Refiner percentage deduction (%) | 10 |
| Fixed refining charge (currency) | 5 |
A worked example
With the example inputs above, assayed metal content (grams) is 80. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Assayed metal content (grams) | 80 |
| Gross contained-metal value (currency) | 160 |
| Net quoted recovery value (currency) | 139 |
How this is calculated
Assayed metal content (grams)
Multiply scrap mass by supplied assay.
Gross contained-metal value (currency)
Multiply contained metal by entered price.
Net quoted recovery value (currency)
Apply percentage deduction and subtract fixed charge.
Symbols and units
- a
- Scrap mass (grams)
- b
- Supplied recoverable-metal assay (%)
- c
- Entered metal price (currency/gram)
- d
- Refiner percentage deduction (%)
- e
- Fixed refining charge (currency)
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
Scenario arithmetic using your assay, price and deduction quote. It provides no valuation, tax treatment or recommendation to transact.
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?
Assayed metal content (grams); Gross contained-metal value (currency); Net quoted recovery value (currency). 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: Scenario arithmetic using your assay, price and deduction quote. It provides no valuation, tax treatment or recommendation to transact.
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
OpenStax Prealgebra 2e — arithmetic and proportions ↗
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.
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