Water-bottle refill calculator
This is a container-planning calculator, not a recommendation for how much anyone should drink.
L
mL
Full bottles per day
4
- Exact bottle equivalents
- 3.33
- Volume carried if bottles are full
- 3.00 L
- Volume over the period
- 75.0 L
Show the working
- Chosen daily target = 2.5
- Bottle capacity = 750
- Days = 30
- Exact bottle equivalents = 2.5*1000/750 = 3.333 33
- Full bottles per day = ceil(3.333 33) = 4
- Volume carried if bottles are full = 4*750/1000 = 3
- Volume over the period = 2.5*30 = 75
Values are shown to six significant figures here; the arithmetic itself runs on exact fractions and is only rounded where a number is printed.
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The formula
- bottle equivalents = daily litres x 1,000 / bottle millilitres
Hydration needs vary; use a target chosen for your own circumstances.