Water tank storage capacities, freeboard, and domestic demand autonomy.
Calculate usable liquid storage capacity in liters and US gallons with air freeboard and daily autonomy.
V_{usable} = L times W times (H_{total} - H_{freeboard}) times 1000 text{ Liters}; quad text{Autonomy} = frac{V_{usable}}{text{Occupants} times 135}