Two sums, both in litres and cans. Water is sized against a published humanitarian standard. Fuel is sized by distance or by running hours, depending on what you actually operate.
Changes the compliance checklist in the results. It tells you what the market requires to let this product in, not what we already hold.
Every default above is either a published standard, named where it is used, or a planning margin you can change. Nothing here is a quotation. Carton and container figures appear only for products where the factory has given us real dimensions; everything else says so.
The water rates in this tool are the headline figures from the Sphere Handbook's minimum standards in water supply, sanitation and hygiene promotion: 15 litres per person per day for drinking, cooking and hygiene, 7.5 litres in the acute phase for a short time, and up to 50 litres in urban or protracted contexts. Survival intake alone is 2.5–3 litres.
A truck burns fuel over distance. A boat, a generator and a tractor burn it over time, because the engine runs whether or not you are covering ground. Sizing a vessel's fuel from a distance figure is a common and expensive mistake, so the tool changes its inputs to match what you operate rather than asking everyone for kilometres.
Marine defaults to a 50% reserve, which is the one-third rule: a third out, a third back, a third untouched.
The calculator gives you a quantity. We will give you a specification sheet, a carton and container breakdown, and a price at your volume.