Calculators
Calculators
Ten 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
- Solar panel setupWhich way the panel should face and how far to tilt it, by season
- 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
- Blood type calculatorWho you can give blood to, and receive it from
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