Water Recycling Efficiency Calculator

Calculate water needs with and without recycling, autonomy days, and launch mass savings for space missions.

Crew size

Mission duration (days)

Recycling efficiency (%)

Initial water supply (kg)

Tab to move between fields

Daily water usage (kg)

16.3

Without recycling (kg)2,938

Fresh water needed (kg)206

Water saved (kg)2,732

Days of autonomy1,751

Net launch mass saved (kg)1,932

How to Use This Calculator

Enter the number of crew and daily water consumption per person (drinking, hygiene, food prep).
Set the water recovery efficiency of your recycling system (ECLSS: ~93%, advanced: up to 98%).
Input the mission duration in days.
Review the daily fresh water production, recycled water volume, and makeup water required.
Calculate total launch mass savings from recycling vs. carrying all water from Earth.

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