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Reference material

Tank sizing and weight

InputYour value
Daily fresh use (gal)
Days between refills
Reserve (%)
Required usable fresh (gal)
Unusable volume estimate
Selected nominal fresh tank
Water weight: gal x 8.34 lb
Tank + support weight
Loaded axle/payload result
Daily grey generation (gal)
Days between legal dumps
Selected grey capacity

Metric shortcut

1 liter of water weighs approximately 1 kilogram. 1 US gallon is 3.785 liters and weighs approximately 8.34 pounds.

Use these reference sheets alongside the guide while planning your system.