Calculators
Calculators
Eight calculators for preparedness. Each one runs in your browser, with no registration, and the same ones are in the PrepperPapa app too, free.
- Water purification calculatorHow much bleach is needed, and how long to boil
- Power calculatorHow far a power bank or a battery gets you
- Heating calculatorHow much wood or gas is needed for N days
- Rainwater calculatorHow much collects from the roof
- Calorie calculatorHow long your food lasts, and what is missing
- Travel time calculatorHow long it takes on foot, and whether you arrive in daylight
- Radio range calculatorHow far you are heard, by band and terrain
- Lightning calculatorHow far the storm is
PrepperPapa app
The same in your pocket, without internet
These calculators are in the app too, free, and they work without a network as well. Alongside them: stock, emergency card, compass and knowledge base.
See what it can do