Precious metals & bullion calculators.
Convert precious-metal units, clarify purity and build transparent jewellery or exchange estimates from your own rates.
Precious metals & bullion
Convert precious-metal units, clarify purity and build transparent jewellery or exchange estimates from your own rates.
Troy ounce converter
Convert troy ounces to grams, kilograms, tola and gemstone carats using a selected tola convention.
- t oz to grams
- Kilograms and tola
- Carat by weight
Gold purity to fine gold weight calculator
Find the fine-gold and alloy portions of an ornament from its gross weight and stated karat purity.
- 10K–24K options
- Fine gold weight
- Alloy remainder
Regional gold units converter
Convert grams into tola, sovereign, pavan, masha, aana, ratti, mithqal, baht-weight and tael conventions.
- Tola convention selector
- Sovereign and pavan
- Traditional subunits
Jewelry purchase and billing calculator
Build a transparent jewelry estimate from gold weight, rate, making charge, wastage charge and an entered tax rate.
- Making per gram or percent
- Wastage line item
- Editable tax rate
Scrap gold and exchange value calculator
Estimate fine-metal weight and a quoted exchange value after stone weight, purity and refining deductions.
- Stone deduction
- Purity and refining loss
- Entered buy rate
Gemstone and diamond carat converter
Convert gemstone carats to grams, milligrams, points and ratti with the selected ratti convention.
- Carats and points
- Grams and milligrams
- Ratti convention
Silver weight and purity calculator
Calculate fine-silver content and entered market value for 999, sterling 925 and coin 900 silver.
- 999, 925 and 900
- Fine-silver content
- Entered price per gram
Gold-to-silver ratio calculator
Calculate how many troy ounces of silver equal one troy ounce of gold from the spot prices you enter.
- User-entered spot prices
- Clear ratio
- No price feed
Start with the unit and purity on the document
Precious-metal terms look similar but describe different things: a troy ounce is a mass unit, while karat and fineness describe composition. Record whether an item’s weight includes stones, solder or fittings before applying a purity calculation.
Treat market and billing inputs as quotes, not facts from this site
ToolMitra does not load metal prices or determine taxes. Enter the rate, maker charge, wastage policy and tax treatment from the quote you are comparing, then check the invoice, assay or certificate before a purchase or exchange.