Outdoor & Survival
Water purification calculator
Bleach and tablet dose to make water drinkable.
- Instant
- Free
- Private (processed locally)
- No sign-up
Calculate the purification dose
Enter the water volume and tick “cloudy water” if needed: the tool gives the number of bleach drops and tablets.
Key points
- ≈ 2 drops of unscented bleach per liter (4 if cloudy)
- ≈ 1 tablet per liter
- Wait at least 30 min
- Filter cloudy water first
Survival guide. Follow the label. 100% local calculation.
Frequently asked questions
How much bleach per liter?
About 2 drops of unscented household bleach (≈ 6%) per liter of clear water; 4 drops if the water is cloudy.
And tablets?
Generally 1 tablet per liter; always follow the manufacturer’s instructions.
How long to wait?
Let it sit at least 30 minutes before drinking (longer if water is cold or cloudy).
What if the water is cloudy?
Filter first (cloth, filter) then double the dose. Disinfection does not remove chemicals.