What is gram-metres (g·m) in drill results?

Gram-metres (written g·m or gram·metre) is the product of an intercept's grade and its length: grade in grams per tonne (g/t) multiplied by the width drilled in metres. A 10-metre intercept grading 5 g/t gold and a 50-metre intercept grading 1 g/t gold both return 50 gram-metres.

The metric exists because neither grade nor width alone tells you how much metal a hole found. A spectacular 30 g/t hit over 0.5 m (15 g·m) may be less significant than a 2 g/t hit over 40 m (80 g·m). Gram-metres collapses the two variables into one comparable figure, which is why it is the default ranking metric for drill databases and why Strikepoint News ranks intercepts by it.

Caveats: gram-metres rewards bulk-tonnage, lower-grade results and can flatter wide, low-grade intercepts that may not be economic. It also assumes the reported width approximates true width. Use it to screen and compare, not as a substitute for a resource estimate. The drill calculator computes gram-metres for any reported intercept.