Firewood, propane, water, and gardens — sized for the property, not the spreadsheet.
Property systems are not sized for the average day; they are sized for the worst week. A well that keeps up in April, a propane tank that lasts until spring, a rain barrel that carries the garden through a dry stretch — each is a question about capacity at peak demand and duration between refills, not about typical use. These calculators work in those terms. Firewood is figured by the cord and by species heat content, because a cord of soft wood and a cord of hard wood are not the same purchase. Water, septic, and irrigation size from flow and storage. Garden and livestock tools size from the space and the season.