Examples
Examples
Try the starting example
- Usable water aboard (L)
- 200
- Crew count
- 4
- User water use (L/person/day)
- 10
- Daily planned refills (L)
- 0,0,100,0,0
- End-of-day water balances (L)
- [160,120,180,140,100]
- Minimum additional refill required to avoid negative balance (L)
- 0
- No-refill endurance (days)
- 5
Try another scenario
- Usable water aboard (L)
- 220.00000000000003
- Crew count
- 4
- User water use (L/person/day)
- 10
- Daily planned refills (L)
- 0,0,100,0,0
- End-of-day water balances (L)
- [180,140,200,160,120]
- Minimum additional refill required to avoid negative balance (L)
- 0
- No-refill endurance (days)
- 5.5
Calculation method
Calculation method
End-of-day water balances (L)
Daily running balance=start+refills-crew×use; negative levels display planned shortfall.
Minimum additional refill required to avoid negative balance (L)
Daily running balance=start+refills-crew×use; negative levels display planned shortfall.
No-refill endurance (days)
Daily running balance=start+refills-crew×use; negative levels display planned shortfall.
Symbols and units
- a
- Usable water aboard (L)
- b
- Crew count
- c
- User water use (L/person/day)
- d
- Daily planned refills (L)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- Usage chosen by user; ignores tank capacity when refilling and makes no drinking-water adequacy claim. Supported limits: All required fields must be finite values of the exact declared type and within displayed bounds. Lists contain1–1000 finite numbers. JSON tables are numeric rectangular rows, at most100 rows and30 columns; individual tools have stricter shape/domain constraints. Usage chosen by user; ignores tank capacity when refilling and makes no drinking-water adequacy claim.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.