Base Metals:
Base metals are measured in terms of Kg and Metric Ton or simply Ton.Many of us may be confused but Ton and Metric-Ton both are same.
Exchanges in India like MCX,ICEX uses Kg as a base unit while American exchanges like COMEX have pounds as a basic unit.
Crude Oil:
Barrel [BBL] is a unit for measurement of crude oil production.
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Standard BBL is a unit used in united states to measure production of crude oil and other petroleum products.Somewhere oil is also measured in terms of cubic meters [m^3] or in tonnes as per some of the European companies.
Precious Metals:
Troy-Ounce is the most base unit for Gold and Silver in American markets.
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In American markets,basic prices are in troy-ounce while in Indian markets it is in terms of Tola [1o gram].
Natural Gas:
British Thermal Unit [Btu] is a traditional unit of energy .In natural gas by convention,unit is mmBtu[one million btu].
At defined temperature and pressure,
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This information may not be useful for day to day trading activities but can be kept as general information.