Gold Polish Calculator — Ratti-per-Tola Loss → Grams Output
Polish loss rates can also be quoted in ratti-per-tola (a more granular South Asian metric — 8 ratti per masha, 96 ratti per tola). Common rates: 4 ratti, 6 ratti or 8 ratti per tola of polish loss, equivalent to 0.486 g, 0.729 g or 0.972 g per tola.
This calculator accepts the ratti-per-tola rate and returns gross-minus-polish weight in international grams, ready for refining-yard intake or international valuation.
When to use this calculator
- Granular polish-rate settlement
- High-detail Sarafa Bazar reckoning
Ratti-per-Tola Polish Rate: Gram Output
Polish loss rates in South Asian jewellery workshops are sometimes declared in ratti-per-tola instead of grams-per-tola, giving finer control at low loss rates. 1 ratti = 0.1215 g, so 4 ratti/tola = 0.486 g/tola — a half-rate that has no clean gram equivalent and is more naturally expressed in ratti.
This variant converts the ratti/tola rate to a gram loss and returns the net gram weight, making it suitable for international refiner intake forms and customs documentation that require metric weights. The conversion is: loss (g) = gross tola × ratti rate × 0.1215.
For the same calculation with tola/masha/ratti output — keeping everything in South Asian units for the customer receipt — use the ratti/tola → tola output polish calculator.
Ratti/tola polish in grams
Polish loss (g) = Gross tola × ratti-per-tola × 0.1215. Net = Gross − Polish. Example: 5 tola gross, 8 ratti/tola → polish = 5 × 8 × 0.1215 = 4.86 g; net = 58.32 − 4.86 = 53.46 g.
Step-by-step calculation
Example: 2 tola gross at 4 ratti/tola polish rate
- 1
Gross weight in grams
gross (g) = tola × 11.664
2 × 11.664 = 23.328 g gross
- 2
Loss per tola in grams
loss/tola (g) = ratti × 0.1215
4 × 0.1215 = 0.486 g/tola
- 3
Total polish loss
total loss (g) = gross tola × loss/tola
2 × 0.486 = 0.972 g loss
- 4
Net weight in grams
net (g) = gross − total loss
23.328 − 0.972 = 22.356 g net
Sample conversions
| Input | Result |
|---|---|
| 1 tola gross, 4 ratti/tola polish | 11.178 g net (0.486 g loss) |
| 2 tola gross, 8 ratti/tola polish | 22.356 g net (0.972 g loss) |
Quick Reference — Ratti/Tola Loss to Gram Net Weight
| Gross Weight | At 4 ratti/tola |
|---|---|
| 1 tola (11.664 g) | 11.178 g net |
| 2 tola (23.328 g) | 22.356 g net |
| 5 tola (58.320 g) | 55.890 g net |
| 10 tola (116.64 g) | 111.780 g net |
Loss (g) = Gross tola × ratti/tola × 0.1215. 8 ratti = 0.972 g ≈ 1 g/tola.
Frequently asked questions
How does 8 ratti/tola compare to 1 gram/tola polish rate?
8 ratti = 0.972 g, slightly less than 1 g. Many jewellers prefer the ratti formulation for finer control — 4 ratti/tola (0.486 g) is a common half-rate that has no clean gram equivalent, making ratti the more natural unit for granular Sarafa Bazar settlement.
What is the grams-per-tola equivalent of 6 ratti/tola?
6 ratti × 0.1215 g/ratti = 0.729 g per tola. So on a 5-tola piece: polish loss = 5 × 0.729 = 3.645 g; net weight = 58.320 − 3.645 = 54.675 g.
Is ratti-per-tola a more precise polish rate than grams-per-tola?
Ratti/tola offers finer increments at small rates (1 ratti = 0.1215 g, vs the practical minimum of 0.1 g/tola in gram notation). For rates under 0.5 g/tola, the ratti system is more granular and avoids sub-decimal gram fractions that are hard to measure on typical shop scales.
What is the minimum ratti/tola polish rate typically used?
2 ratti/tola (0.243 g/tola) is the practical minimum for machine-polished satin-finish pieces. Rates below 2 ratti/tola are unusual; pieces below that threshold often have no separate polish charge and are settled on gross weight.
Do ratti-per-tola rates vary between gold karats?
The ratti/tola rate is a physical mass loss — it does not change with karat. However, the monetary value of that loss differs by karat: a 22K piece loses more money per gram of polish than an 18K piece because the pure-gold fraction is higher.
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