How Silver Jewellery Exchange Value Is Calculated
Exchanging silver jewellery means trading in an old piece and putting its estimated value toward a new one, rather than receiving cash the way a straight sale would. The calculation has two independent sides — what the old silver is worth after any deduction, and what the new jewellery costs including wastage, making charges and GST — and the final amount payable or credit is simply the difference between them. This guide walks through both sides using the same logic as the SonaChandiTools Silver Exchange Calculator.
The Old Silver Side of an Exchange
The old piece is valued the same way it would be for a plain sale: its purity (999 or 925) and weight, measured at the time of exchange, are multiplied by the site's centralized reference rate for that purity to get the old silver value. A deduction percentage, where the jeweller applies one, is then subtracted to arrive at the old silver's exchange value. Making charges and GST are not added to this side of the calculation — only the silver value and the deduction apply, exactly as in the Silver Sell Calculator.
The New Jewellery Side of an Exchange
The new piece is priced the same way it would be for an ordinary purchase: its purity (999 or 925) and weight are multiplied by the applicable reference rate to get the new silver value, then wastage (where charged) and making charges (percentage-based or a flat amount) are added, and GST is applied on that subtotal to arrive at the new jewellery's total amount — the same calculation used by the Silver Jewellery Calculator.
How the Final Amount Is Worked Out
The final amount is: New jewellery total − Old silver exchange value. If the new jewellery costs more than the old silver's exchange value, the result is positive and you pay the difference. If the two amounts are equal, there's nothing more to pay. If the old silver's exchange value is higher than the new jewellery's cost, the result is negative, meaning the difference is a credit or balance in your favour — how that credit is settled (adjusted, refunded or carried forward) depends on the jeweller's own policy.
Silver Jewellery Exchange Value Formula
The same sequence the Silver Exchange Calculator follows, split into its old, new and final steps.
Old Silver (Exchanged In)
- 1.Old silver value = Old silver rate × Old weight
- 2.Deduction amount = Old silver value × Deduction % (where applied by the jeweller)
- 3.Old silver exchange value = Old silver value − Deduction amount
New Jewellery (Being Purchased)
- 1.New silver value = New silver rate × New weight
- 2.Wastage amount = New silver value × Wastage % (where applied)
- 3.Making charge = New silver value × Making charge %, or a flat amount
- 4.Taxable subtotal = New silver value + Wastage amount + Making charge
- 5.GST amount = Taxable subtotal × GST %
- 6.New jewellery total = Taxable subtotal + GST amount
Final Amount
- 1.Final amount payable = New jewellery total − Old silver exchange value
Worked Example
The figures below use the site's current centralized reference rate for 925 silver, along with hypothetical weight, deduction, wastage, making charge and GST figures — purely to illustrate how the two sides combine, not as typical or recommended figures.
Old silver: for 50 grams of 925 silver at ₹85.19/gram, the silver value is ₹4,259.50. A hypothetical 2% deduction reduces this by ₹85.19, giving an old silver exchange value of ₹4,174.31.
New jewellery: for 50 grams of 925 silver at the same ₹85.19/gram, the silver value is ₹4,259.50. A hypothetical 5% wastage adds ₹212.98 and a hypothetical 10% making charge adds ₹425.95, giving a taxable subtotal of ₹4,898.43. A hypothetical 3% GST then adds ₹146.95, for a new jewellery total of ₹5,045.38.
New jewellery total ₹5,045.38 minus old silver exchange value ₹4,174.31 leaves a positive difference — the estimated amount payable is ₹871.07.
This is an illustrative calculation only, using the site's current centralized reference rate for 925 silver (via getSilverRate('925')) — not a live market, API, or official market rate. It is not an actual jeweller's quotation; an actual bill may differ based on the jeweller's own rate, deductions, making charges, wastage, GST and other applicable terms. Use the Silver Exchange Calculator with your own numbers for a closer estimate.
Why the Final Exchange Amount Can Differ Between Jewellers
Two jewellers can reasonably arrive at different final amounts for what looks like the same exchange, because several inputs on both sides are set independently: the silver rate they use for the day, how they assess the old piece's purity and weight, the deduction percentage applied to it, and — on the new piece — the making charge method and figure, the wastage percentage, the GST treatment, and any item-specific pricing for the new design. No single jeweller's method is universally more correct; comparing the itemised breakdown, rather than just the final number, makes it easier to see where the amounts diverge.
Exchange Value vs. Selling Value vs. New Purchase Price
These three related figures answer different questions, even though they share the same underlying silver rate and purity data.
| Concept | What It Answers | Where to Calculate It |
|---|---|---|
| Selling value | What you'd receive in cash for old jewellery, with no new purchase involved | Silver Sell Calculator |
| New purchase price | What a new piece costs on its own, including wastage, making charges and GST | Silver Jewellery Calculator |
| Exchange value (net) | The difference between the new purchase price and the old item's exchange value — what's still payable, or credited | Silver Exchange Calculator |
Before Exchanging Old Silver Jewellery, Ask For
An itemised answer to each of these makes it much easier to follow — and compare — the final amount.
- The purity they are assessing the old jewellery at
- The weight they are accepting for the old jewellery
- The silver rate being used for the calculation
- The deduction percentage applied to the old silver value
- The old silver's resulting exchange value
- The weight of the new jewellery
- The making charge method and figure for the new jewellery
- The wastage percentage, if any, on the new jewellery
- The GST applied and what it is calculated on
- The final amount payable or credit, shown as a clear breakdown
This Is a Reference Calculation, Not a Verified Jeweller Bill
The Silver Exchange Calculator and the worked example on this page provide an estimate using the site's centralized reference silver rate and figures you enter — they do not verify a jeweller's actual purity assessment, weight measurement or final bill. Actual exchange amounts depend on the jeweller's own rate, deduction, making charge, wastage, GST and other applicable terms, and can vary between jewellers. Always ask for an itemised breakdown before agreeing to an exchange.
Related Calculators & Guides
Use today's reference rate and your own figures in the calculator, or read more on each related topic below.
Silver Exchange Calculator
Enter your old and new jewellery details to estimate the final amount payable or credit.
Silver Jewellery Calculator
Estimate what a new piece of silver jewellery would cost to buy on its own.
Silver Sell Calculator
Estimate what old silver jewellery would fetch in a straight sale, with no new purchase.
Silver Rate Today
See today's reference rate for 999 and 925 silver.
999 vs 925 Silver: What’s the Difference?
How 999 and 925 silver compare in purity and price.
What Is 925 Silver? Meaning, Purity & Fineness
What the 925 mark on silver jewellery means.
How Silver Jewellery Price Is Calculated
A step-by-step look at how a silver jewellery purchase price is calculated.
How Silver Jewellery Selling Value Is Calculated
How the estimated selling value of old silver jewellery is calculated.
Silver Making Charges Explained
A closer look at percentage-based and flat/per-gram silver making charges.
Silver Wastage Charges Explained: How Wastage Percentage Works
How silver wastage charges work and how the percentage is calculated.
Frequently Asked Questions
- How is silver jewellery exchange value calculated?
- It's the difference between two independent calculations: the new jewellery's total cost (silver value plus wastage, making charges and GST) minus the old silver's exchange value (silver value minus any deduction). A positive result is payable, a negative result is a credit.
- Is making charge deducted from old silver jewellery?
- No. The old silver side of an exchange is valued the same way as a plain sale — silver value minus any deduction the jeweller applies. Making charges are not part of that calculation; they only apply to the new jewellery being purchased.
- Is GST added to the old silver exchange value?
- No. GST is applied to the new jewellery's subtotal (silver value plus wastage and making charges), not to the old silver's exchange value, which is based only on silver value minus any deduction.
- Why is there a deduction on old silver jewellery?
- A deduction is commonly described as covering things like purity verification or re-melting loss, and reflects the jeweller's own buyback policy. There is no fixed or industry-standard deduction percentage — it varies by jeweller.
- Can 925 silver be exchanged for 999 silver?
- The calculation itself doesn't require the old and new purities to match — each side uses its own applicable rate for its own purity. Whether a particular jeweller accepts an exchange across purities, and on what terms, is a policy question to confirm with them directly.
- Why does the exchange amount differ between jewellers?
- Differences in the silver rate used, purity and weight assessment, deduction percentage, making charge method, wastage and GST treatment on the new piece can all lead to different final amounts, even for what looks like the same exchange.
- Can I calculate silver exchange value online?
- Yes — the Silver Exchange Calculator on this site lets you enter the old jewellery's purity, weight and deduction alongside the new jewellery's purity, weight, wastage, making charge and GST, and shows the estimated final amount payable or credit using today's reference rate.