Gold bill calculator: fine weight and 3% GST

Work out the bill

Filled in with an example: a 22K piece of 10.5 g with 0.5 g of stones, and 5 g of old gold traded in. The rate is an example, not today's rate.

The piece

Gross weightgramsWeighed with the stones in. Up to three decimal places, to the milligram. Stone weight to deductgramsStones, beads and anything else that is not gold. 0 for plain gold. PurityThe hallmark grade stamped on the piece. Wastage or value additionpercentCharged as a % of the gold value. 0 if the bill has none.

Rate and making charges

Rate of the day, per 10 grupees per 10 gramsThe example rate is not today's. Use the rate on your bill or the shop's board.

That rate is for

This purity, charged on net weight Pure 24K gold, charged on fine weight

Making charges are

Per gram of net weight A % of the gold value

Making charges per gramrupees per gramOn the net weight, stones excluded. Stone value on the billrupees0 if the stones are not charged separately.

Exchanging old gold? (optional)5.000 g, worth ₹52,062.50

Old gold weightgrams0 if you are not exchanging any. Tested puritypercentThe touch the shop's test shows, which is often below the stamp. Buy-back rate per 10 g of pure goldrupees per 10 gramsApplied to the fine weight of the old gold. Deduction on old goldpercentMelting loss or exchange charge, if the shop takes one. 0 if not.

You pay₹83,074.00

Fine weight 9.160 g. Bill total ₹1,35,136.00 including GST of ₹3,936.00. After old gold worth ₹52,062.50, you pay ₹83,074.00.

How the jewellery bill is worked out, line by line
Line	Working	Value
Net weight	10.500 g gross − 0.500 g stones	10.000 g
Fine weight	10.000 g × 91.6%	9.160 g
Gold value	10.000 g net × ₹1,15,000.00 per 10 g at this purity	₹1,15,000.00
Wastage	8% of the gold value	₹9,200.00
Making	10.000 g × ₹500.00 per g	₹5,000.00
Stones	as billed	₹2,000.00
Value before GST	gold + wastage + making + stones	₹1,31,200.00
GST at 3%	CGST 1.5% + SGST 1.5% in the same state, IGST 3% across states	₹3,936.00
Bill total	value + GST	₹1,35,136.00
Old gold, fine weight	5.000 g × 85% tested	4.250 g
Old gold value	4.250 g × ₹1,25,000.00 per 10 g, less 2% (₹1,062.50)	minus ₹52,062.50
You pay	bill total − old gold, after GST	₹83,073.50
Rounded to the rupee	round-off +₹0.50	₹83,074.00

The jewellery pack bills metal, making and stones on one bill like this.Apply as a jeweller

About this calculator

Enter the weights, purity, rate of the day and making charges. You get the fine weight (the pure gold in the piece), gold value, wastage, making charges, 3% GST, the total, and what you pay after old gold exchange.

A calculator, not advice: rates, wastage and making are whatever you and the jeweller agree, and your CA has the last word on tax. Nothing you type leaves this page. Last reviewed 14 October 2026.

How the figures are worked

The rule behind each line.

Weights. Net weight = gross weight less stones. Fine weight = net weight × purity. Kept to the milligram.

Gold value. Shops quote the rate two ways. A rate for this purity, such as 22K, is charged on net weight. A rate for pure gold is charged on fine weight. Pick the one on your bill; they give different totals.

Wastage and making charges. Wastage, also called value addition, is a % of the gold value. Making charges are a rate per gram of net weight, or a % of the gold value before wastage. Each has its own line.

GST. Gold, silver and jewellery stay at 3%; the September 2025 changes left this alone. Metal, wastage, making and stones count as one value, taxed as a whole: CGST 1.5% and SGST 1.5% in the same state, IGST 3% across states. Giving the jeweller your own gold to make into jewellery is job work, taxed at 5% on the making charge. This calculator does not cover that.

Old gold exchange. Settled after tax. The shop buys it at its tested touch (the purity its test shows), on a purchase voucher. It cuts what you pay, not the GST on the new piece. Old jewellery bought from a private person carries no reverse charge. Money lines are rounded to the paisa; the last line rounds the total to the rupee.

Our GST guide for jewellers has the full rules.

What this calculator is not

Four things it leaves to you and the jeweller.

It does not know today's rate. Rates change daily and differ by city and shop.

It does not test purity. A hallmark with a HUID shows a new piece's grade. The shop's touch test decides what your old gold is worth to them.

It gives an estimate, not the tax invoice, and no advice on fair making charges.

It sends nothing you type. Nothing is sent, stored or saved on this device; reloading clears it. One count is sent the first time a number you changed gives a result. It names the calculator, not your figures. See the privacy policy.

Metal, making and stones on one bill.

The jewellery pack bills metal at the rate of the day, with making charges and stones, as one value. It settles old gold exchange after tax at its tested touch, and tracks the fine gold with each karigar. Built, and no jeweller bills with it yet.

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