Rhodium Value Calculator by Weight & Purity | 1Dollars

Free Rhodium Value Calculator

Calculate rhodium value from verified material or contained-metal weight, quantity, assay purity, recovery and a current quote you enter. Estimate contained rhodium, recoverable value and possible net payout.

Rhodium Price by Weight and Purity

Value solid metal, assayed material, solution, known plating content or verified catalyst content. Rhodium has no LBMA benchmark, so this tool requires your own permitted refiner, dealer or contract quote.

For plating or catalysts, never use the whole item's gross weight.
Use a price and currency appropriate for the valuation date.
Use the refiner's stated recovery/payable percentage; keep 100% for contained value.
Keep 100% when the quote already represents the payable value.
Enter zero when no separate fixed fee applies.

No live rhodium price, exchange rate, assay or guaranteed offer is supplied. Plated-item and catalytic-converter gross weights are not contained rhodium weights.

Reviewed on 16 July 2026 using FTC rhodium surface-layer guidance, USGS platinum-group-metal information, LBMA's published benchmark list and NIST 2026 weight-conversion guidance.

Rhodium value requires more than an object's gross weight. The relevant input is verified rhodium-bearing material weight with an assay percentage, or actual contained rhodium weight. This calculator also separates technical recovery, buyer payout and fixed fees.

Quick answer: choose the material basis, enter verified weight and rhodium mass percentage, then add a permitted refiner, dealer or contract quote. Use recovery and payout fields only when those reductions are separately stated.

Rhodium Value Formulas

Contained rhodium = entered weight × quantity × rhodium purity
Contained intrinsic value = contained rhodium × normalized fine-rhodium quote
Recoverable value = contained intrinsic value × recovery or payable percentage
Estimated net payout = recoverable value × buyer payout percentage − fixed fee

The entered quote and material weight are normalized through grams. If the quote applies to a product below 100% purity, the tool converts it to a fine-rhodium rate before applying the material assay.

How to Use the Rhodium Calculator

  1. Select solid/alloy, assayed material, solution, known plating content or verified catalyst content.
  2. Enter material weight—or actual contained rhodium weight for plating and catalyst modes.
  3. Enter quantity and a verified rhodium mass percentage.
  4. Enter a current permitted rhodium quote with its currency, unit and purity basis.
  5. Use the refiner's recovery/payable percentage, or keep 100% for contained value.
  6. Enter a separate buyer payout percentage and fixed fee only when applicable.

Choose the Correct Rhodium Material Basis

Material optionWeight to enterPurity or assay input
Solid rhodium or known alloyNet metal/alloy weightVerified rhodium mass percentage
Sponge, powder or residueRepresentative assayed material weightLaboratory rhodium mass percentage
SolutionAssayed solution weightRhodium percentage by mass—not concentration by volume
PlatingActual contained or recovered rhodium only100% only when the entered weight is already fine rhodium
CatalystVerified contained rhodium onlyDo not use the full catalyst or converter weight
Do not estimate plating from jewelry weight: rhodium plate is a surface layer. The FTC Jewelry Guides specifically require disclosure of a rhodium surface-layer application on products marked or described as precious metal.

Rhodium Purity and Assay Inputs

This page offers 100%, 99.9%, 99.5%, 95%, 90% and custom assay inputs as mathematical options, not universal hallmark standards. Rhodium can appear in solid metal, alloys, sponge, powder, chemical solutions, residues and multi-metal catalyst material.

Use 100% only when the entered weight already represents verified fine contained rhodium. For a 2% assayed residue or solution by mass, choose custom and enter 2. A parts-per-million laboratory result must be converted to percent before entry: 10,000 ppm equals 1% by mass.

Where to Get a Rhodium Price

LBMA lists global benchmarks for gold, silver, platinum and palladium—not rhodium. Rhodium quotations may instead come from refiners, specialist dealers, industrial contracts or commercial pricing services, and their terms can differ.

This calculator does not fetch or label any source as an official live rhodium spot price. Record the quote's provider, timestamp, currency, unit, purity basis, bid/offer side and whether treatment or payable terms are already included.

Avoid double deductions: if a refiner's quote is already a payable net rate, leave recovery and buyer payout at 100% unless the written settlement applies additional reductions.

Troy Ounce and Other Weight Units

Troy ounceExactly 31.1034768 grams. Do not confuse it with an everyday ounce.
Regular ounceExactly 28.349523125 grams under the avoirdupois system.
PennyweightOne pennyweight is 1.55517384 grams, or 1/20 troy ounce.
TolaThe tool uses 11.6638038 grams; confirm the convention in the quoted market.

Worked Rhodium Value Example

Assume 2 grams of assayed material at 99.9% rhodium, an invented USD 5,000 fine-rhodium quote per troy ounce, 95% recovery, 90% buyer payout and a USD 25 fixed fee:

  • Contained rhodium = 2 g × 99.9% = 1.998 g
  • Fine-rhodium quote per gram = USD 5,000 ÷ 31.1034768 = about USD 160.7537
  • Contained intrinsic value = about USD 321.19
  • Recoverable value at 95% = about USD 305.13
  • Offer at 90% of recoverable value = about USD 274.61
  • Estimated net payout after USD 25 fee = USD 249.61

The USD 5,000 quote is invented solely to demonstrate the formula.

Rhodium-Plated Jewelry

Rhodium-plated jewelry should not be valued by multiplying the ring, chain or other item's full weight by a rhodium quote. Most of the article is the underlying precious or base metal; the rhodium is a surface application.

Use plating mode only when actual contained or recovered rhodium weight is known from reliable production records or specialist analysis. Jewelry retail, gemstone, design and underlying-metal value belong in separate calculations.

Catalytic Converters and Industrial Catalysts

USGS identifies rhodium, platinum and palladium among PGMs used in automotive catalysts. A catalytic converter also contains a shell, substrate and other materials, so its total mass is not rhodium content.

Use catalyst mode only with verified contained rhodium weight from representative sampling and specialist assay. Actual settlement may depend on lot homogenization, moisture, other PGMs, recovery, treatment charges, minimum lots and market timing.

Solutions, Powders, Sponge and Residues

For assayed powder, sponge or residue, multiply representative material mass by the rhodium mass percentage. For a solution, the purity input must be percent by mass relative to the entered solution weight; grams per litre, molarity and other concentration units cannot be entered directly without conversion.

Sampling error can dominate a calculation when rhodium is unevenly distributed. A laboratory assay and clear dry/wet mass basis may be required before the formula is meaningful.

Contained Value, Recovery and Payout

Contained intrinsic valueAll assayed rhodium valued at the normalized quote, before technical or commercial deductions.
Recoverable valueContained value after the entered recovery or payable percentage.
Buyer offerRecoverable value after the buyer payout percentage.
Net payoutBuyer offer less the separately entered fixed fee, floored at zero.

Safety and Estimate Quality

Safety: do not grind, burn, chemically strip, dissolve or dismantle jewelry, catalysts, solutions or industrial residues for this calculator. Unknown, reactive, hazardous or regulated material requires qualified handling.
  • Use calibrated weight records and representative professional assay results.
  • Match wet, dry, solution or contained-metal basis to the laboratory report.
  • Use one quote currency and the exact quoted weight and purity basis.
  • Compare written settlements with recovery, payable metal, fees and timing disclosed.
  • Keep source records; rhodium quotes can differ materially between providers and forms.

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Frequently Asked Questions

How do I calculate rhodium value?
Multiply verified material weight by rhodium mass percentage, normalize the entered quote to fine rhodium per gram, then apply recovery, buyer payout and fixed fees as needed.
Does this calculator provide a live rhodium price?
No. LBMA does not list a rhodium benchmark. Enter a current refiner, dealer, contract or commercial quote you are permitted to use.
Can I value rhodium-plated jewelry from the item's weight?
No. The item weight mostly represents the underlying metal and stones. Use plating mode only with actual contained or recovered rhodium weight.
Can this calculator value a catalytic converter?
Only when verified contained rhodium weight is already known. Never enter the whole converter or catalyst weight as rhodium.
What does recovery or payable percentage mean?
It is the share of assayed contained rhodium expected to be recovered or contractually payable before the separate buyer payout and fixed fee.
How do I enter rhodium in a solution?
Enter solution mass and a verified rhodium percentage by mass. Convert grams per litre, molarity or other concentration measures before using this calculator.
Is a troy ounce the same as a regular ounce?
No. One troy ounce is 31.1034768 grams, while one regular avoirdupois ounce is 28.349523125 grams.
Should a fine-rhodium quote use 100% purity basis?
Yes when the quote represents value per fine rhodium unit. Select another basis only when the source explicitly prices a gross unit of material at that purity.
Why can a rhodium offer be below contained value?
Sampling, assay, recovery, payable-metal terms, treatment, minimum lots, market risk, fees and margin can reduce settlement. Model only disclosed terms.
Is the calculated rhodium value guaranteed?
No. Material identity, sampling, assay, quote timing, currency, recovery, fees, taxes and buyer terms can change actual value.

Official Reference Sources

Disclaimer: This calculator provides an educational estimate, not a live price, professional assay, recovery guarantee, appraisal, dealer offer, chemical-handling guidance, investment recommendation, tax advice or legal advice. Verify material identity, weight basis, assay, quote, recovery, currency, fees, taxes and settlement terms independently. The next page is the Gold–Silver Ratio Calculator.