How long would it last? A scenario calculator

Pick a mineral or fuel and change the assumptions. With none changed, the answer is the site's reserve life: reserves divided by the latest year's output. Everything you change is your scenario, not a forecast and not data.

Material
Yearly demand growth:

Share of demand met by recycling or other sources, not by these reserves:
New reserves added each year, as a share of that year's mining:
Reserve figure, as a multiple of the latest counted figure:

Result

How it is calculated

Mining in year t is the latest output times (1 + growth)^t−1, times the share of demand that is not met by recycling or other sources. New reserves added are your percentage of that year's mining. The calculator finds the year in which the net draw on the starting reserves reaches the reserves counted.
With growth g, output P, reserves R and a combined factor f = (1 − recycled share) × (1 − additions share), the years are ln(1 + R × g / (P × f)) / ln(1 + g), or R / (P × f) when g is zero. If additions are 100% or more, or output is shrinking fast enough, the reserves are never used up under your assumptions.
Starting figures: USGS Mineral Commodity Summaries 2026 for minerals; for oil, gas and coal, the Energy Institute's end-2020 proved reserves less what was produced since (the same figures as how much is left). Where USGS prints reserves as "more than" a figure, the result is a minimum.
Reserves are not the amount in the ground, and they have risen as often as they have fallen (see reserves versus resources). Recycling and new reserves here are numbers you choose; the site has no data on how either will change.

Starting figures as published by USGS and the Energy Institute; none of this is a forecast or investment advice. Commodity Origins.