On the 'metal grade equivalent calculator' page select the metals to be included in the calculation - up to eight may be chosen. Grade equivalents will be expressed in terms of the 'Primary metal' selected. At least one other metal must be selected in addition to the primary metal. Enter the prices of the selected commodities in US Dollars. The price units will be diplayed automatically.

Enter the Mine Call Factor (MCF) of the selected commodities in percent. The MCF is defined as the mine recovery multiplied by the plant recovery. For example, if the mine recovery for a particular metal is 96% (i.e. 96% of the metal mined reports to the plant), and the plant recovery for that metal is 92%, then the MCF is 88%. If the MCF is unknown, then enter 100% for each metal.

The price factors (calculated) are inserted automatically.

Enter the grades for the selected metals and press 'Calculate'. The primary metal equivalent grade and revenue per tonne of ore is displayed. The equivalent grade is expressed on a ROM basis if recoveries are not known, or on a 'mine gate' basis if they are.

On the 'Resource/Reserve equivalent calculator' page select the metals to be included in the calculation - up to eight may be chosen. Resource/Reserve equivalents will be expressed in terms of the 'Primary metal' selected. At least one other metal must be selected in addition to the primary metal. Enter the prices of the selected commodities in US Dollars. The price units will be diplayed automatically.

Enter the Resource and Reserve figures for the selected metals according to the units displayed and press 'Calculate'. The Resource and Reserve revenues for the selected metals is displayed, along with the equivalent Resource and Reserve figures for the primary metal. The Resource and Reserve equivalents are particularly useful for financial practitioners for assessing and comparing mineral projects.