Water planning tool
Tiny House Water Autonomy Calculator
How long will the fresh tank actually last? Use your own measured or planned household consumption instead of a generic “off-grid average.”
Fresh-water autonomy
Full fresh-tank weight
Water alone, using approximately 8.34 lb per U.S. gallon.
Grey-water capacity
Measure your real use if you can.
Showering, dishwashing, laundry, toilet type and conservation habits can change daily consumption dramatically. A week of measured use is more useful than a generic lifestyle estimate.
This is a capacity planner, not a potable-water or plumbing design. Tank placement also affects trailer loading and weight distribution. Grey-water generation may be lower than fresh-water consumption depending on toilet type, cooking/drinking use and other losses.