Mining analysis tool

Advanced Drill-Hole Interval Calculator

Calculate residual grades across nested intervals, estimate in-situ and recovered payable metal values, and assess true-width dilution.

Setup

Metals and economics

Choose up to six metals, with optional metal equivalent-grade calculation. Daily market prices remain editable.

Metal

Column 1 Column 2 Column 3 Column 4 Column 5 Column 6

Equivalent

No No No No No No

Price

Column 1 Column 2 Column 3 Column 4 Column 5 Column 6

Recovery

Percent Percent Percent Percent Percent Percent

Payability

Percent Percent Percent Percent Percent Percent

Loading daily market prices… Source: MetalpriceAPI. Prices remain editable.

Optional

True width and dilution

Enable underground narrow-vein dilution assumptions when required.

Enable dilution calculation

Interval data

Paste start, end, and grade values

Use space-delimited values. Omit widths, these are calculated automatically. Enter mined open voids as From To VOID. Negative values may result from source rounding errors.

For example, for:

Hole ID	Start	End	Width	Au(g/t)	Ag(g/t)	AuEq(g/t)	AgEq(g/t)
Stockwork	2.50	13.50	11.00	0.33	2.5	0.36	27.2
Stockwork	20.65	37.80	15.50	0.62	55.2	1.36	101.9
Incl. Vein	21.65	24.00	2.35	2.92	216.8	5.81	436.0
OPEN VOID	30.50	32.15	1.65	*	*	*	*
Stockwork	43.00	49.50	6.50	0.12	6.1	0.21	15.4

Interval Data (replace the example below with your data. Do not include widths)

By calculating and using this website, you acknowledge the .

Results

Calculation output

Results will appear here after calculation.

Advanced Drill-Hole Interval Calculator

Metals and economics

True width and dilution

Paste start, end, and grade values

Calculation output

0. Verify input values

1. Residual grades

2. Gross in-situ metal value ($/t)

3. Net recovered, payable metal value ($/t)

4. True widths and dilution