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Grade converter

Convert a grade between grams per tonne, troy ounces per short ton, parts per million, percent and pounds per metric tonne.

Example numbers are loaded. Replace them with figures from the company's own filings.
Unit
Grams per tonne (g/t)
2.5
Troy ounces per short ton (oz/t)
0.0729
Parts per million (ppm)
2.5
Percent (%)
0.00025
Pounds per metric tonne (lb/t)
0.005512

How it works

Gold and silver grades are usually given in grams per tonne (g/t). Older US reports use troy ounces per short ton (oz/t). Base metals such as copper and zinc are given in percent.

1 g/t is 1 ppm. 1 oz/t is about 34.29 g/t. 1% is 10,000 g/t, or about 22.05 pounds of metal per tonne of rock.

Read the guide: NI 43-101 Resource Estimates Explained →

For education only. Not investment advice. The results are only as good as the numbers entered; check every figure against the company's own filings. See the Disclaimer.

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