Gold Weight Calculator — Cross-Unit & Karat Converter
The unified gold weight calculator handles cross-unit and karat conversions in any direction. Enter weight in any unit (tola, gram, troy oz, kg, HK tael, pennyweight, grain, masha, ratti), pick a karat purity, and the calculator returns the equivalent weight in every other unit plus pure-gold yield and live money value.
This is the master tool for traders working across multiple markets, refinery intake desks, and customs brokers handling gold imports/exports.
When to use this calculator
- Cross-market trading
- Customs reconciliation
- Refiner intake
The Master Cross-Unit, Cross-Karat Gold Calculator
Most gold calculators handle a single direction: grams to tola, or troy oz to grams. This master calculator does all directions simultaneously. Any weight input in any unit (tola, gram, troy oz, kilogram, HK tael, pennyweight, grain) expands into every other unit instantly, with the karat-purity layer splitting each into pure-gold and alloy sub-weights.
The use case it is built for: a customs broker has a shipment invoice in troy ounces but needs to declare weight in grams; a Sarafa trader quotes in tola but the refiner wants kilograms; a jeweller buys in grams but the customer asks for the tola price. All three flows are handled in one screen without changing the input unit or running a separate calculator.
For unit-specific starting points — gram-first or tola-first — the dedicated variant calculators provide narrower interfaces with the same math. Use this master calculator when the input unit itself varies day to day or client to client.
Internal reference
All units normalise to grams first (1 tola = 11.664 g, 1 troy oz = 31.1035 g, 1 HK tael = 37.429 g, 1 dwt = 1.5552 g, 1 grain = 0.0648 g), then karat-purity math, then re-expression in target unit.
Step-by-step calculation
Example: 2 troy oz of 22K gold
- 1
Convert troy oz to grams
grams = troy oz × 31.1035
2 × 31.1035 = 62.207 g
- 2
Convert grams to tola
tola = grams ÷ 11.664
62.207 ÷ 11.664 = 5.333 tola
- 3
Convert grams to HK tael
tael = grams ÷ 37.429
62.207 ÷ 37.429 = 1.663 tael
- 4
Pure gold at 22K (grams)
pure (g) = grams × (22 ÷ 24)
62.207 × 0.9167 = 57.023 g pure
- 5
Pure gold in tola
pure tola = pure grams ÷ 11.664
57.023 ÷ 11.664 = 4.889 tola pure
Sample conversions
| Input | Result |
|---|---|
| 1 troy oz 22K | 0.917 troy oz pure = 2.444 tola pure |
| 5 tola 18K | 3.75 tola pure = 43.74 g pure |
Quick Reference — Unit Conversion Factors
| 1 unit equals… | Grams |
|---|---|
| 1 tola | 11.664 g |
| 1 troy oz | 31.1035 g |
| 1 HK tael | 37.429 g |
| 1 kg | 1,000 g |
| 1 pennyweight (dwt) | 1.5552 g |
| 1 grain | 0.06480 g |
All factors normalise through grams. Rounding may accumulate; use full-precision calculator for financial settlements.
Frequently asked questions
Which calculator variant should I use day-to-day?
If you work entirely in one unit system, use the gram or tola variant. The master calculator is for cross-system reconciliation — when you need outputs in every unit at once, such as when trading across multiple markets in a single day.
Does the master calculator update live with spot prices?
Yes — the money-value output uses the live international XAU/USD spot price refreshed every 60 seconds, converted to your local currency. Weight outputs (grams, tola, troy oz, etc.) are constant conversions independent of price.
Can I enter a troy ounce input and get tola output?
The master calculator accepts grams or tola as input. For troy-ounce input, first convert to grams (multiply by 31.1035), then enter the gram value — the calculator will show tola and all other equivalents. The dedicated troy oz to tola calculator also handles this direction directly.
How do I convert between tola and troy ounce without a calculator?
1 tola = 0.375 troy oz exactly (3/8 oz). So multiply tola by 0.375 for troy oz, or divide troy oz by 0.375 (multiply by 2.6667) for tola. This is an exact fractional ratio — no rounding needed.
What karat of gold is used in international bullion contracts?
LBMA Good Delivery bars must be at minimum 99.5% pure (995 fine). Retail investment bars (PAMP, Valcambi, Perth Mint) are 99.99% (9999 fine). COMEX futures reference 99.5% minimum. The master calculator handles any karat for the karat-purity layering on any weight.
Related calculators
These tools cover neighbouring steps in the same workflow — pair them with this one for a complete calculation.