International Gold Unit Converters — Every World Standard, One Tool
Gold trades under a half-dozen different weight standards depending on which market you are in: troy ounce in London/New York, gram across Europe, tola in South Asia, tael in Greater China, pennyweight in the US jewellery trade, and grain in historical or assay contexts. This global unit converter handles all of them on one screen — enter any quantity in any unit and see the equivalent value in every other.
It is the tool international bullion brokers, refinery intake desks, customs brokers, and cross-border traders use to reconcile transactions across markets. The internal conversion ladder is grams → everything (with troy oz = 31.1035 g, tola = 11.664 g, HK tael = 37.429 g, Chinese tael = 31.25 g, pennyweight = 1.5552 g, grain = 0.0648 g) so cross-unit conversions are always grounded in a single metric reference.
Conversion reference table (all relative to grams)
1 troy oz = 31.1035 g · 1 tola = 11.664 g · 1 HK tael = 37.429 g · 1 Chinese tael = 31.25 g · 1 pennyweight = 1.5552 g · 1 grain = 0.0648 g · 1 masha = 0.972 g · 1 ratti = 0.1215 g · 1 kg = 1000 g · 1 troy pound = 12 troy oz = 373.242 g.
Sample conversions
| Input | Result |
|---|---|
| 1 troy oz | 31.1035 g = 2.667 tola = 0.831 HK tael = 20 dwt |
| 1 kg | 32.151 troy oz = 85.734 tola = 26.717 HK tael |
| 1 tola | 11.664 g = 0.375 troy oz = 0.3117 HK tael = 7.5 dwt |
| 1 HK tael | 37.429 g = 1.203 troy oz = 3.208 tola |
| 1 Chinese tael | 31.250 g = 1.004 troy oz = 2.679 tola |
When to use this calculator
- Cross-market arbitrage — compare London (troy oz), Mumbai (tola), Hong Kong (HK tael) and Shanghai (Chinese tael) prices in one calculation.
- Import/export documentation — most customs forms require metric grams; trade contracts often specify the local unit.
- Refinery intake — scrap intake in any local unit, converted to troy ounces of pure gold for payout.
- International estate valuation — heir-distribution calculations across jewellery weighed in different cultural units.
Frequently asked questions
Which gold weight unit should I use for investment tracking?
Use grams for international comparison (universal metric, no rounding issues) and supplement with troy ounces for matching against the LBMA fix or COMEX futures. For South Asian-context investments add tola; for HK/Taiwan add HK tael. The calculator lets you view all simultaneously.
Is the troy ounce being replaced by the gram?
Slowly, in retail and customs contexts. But the LBMA London Gold Price (the global benchmark fixed twice daily) remains troy-ounce denominated, as do COMEX futures and most institutional contracts. The troy ounce is likely here to stay for at least another generation as the trading-floor unit.