Target keywords: emergency supply calculator, survival prep calculator. This page is optimized for search; the full interactive tool lives in the app after sign-in.
Feature
Know exactly what you need
The Prep Calculator turns your household size, duration, and climate into concrete quantities — water, calories, light, and more — without spreadsheet fatigue.
Without PrepFox
Guessing jugs and cans under stress, or copying generic lists that don't match your family.
With PrepFox
Scenario-based totals you can shop against, save, and revisit as your situation changes.
Ready to try it?
Start Preparing — Free