Our Mission
DisasterPrepCalc exists to make emergency preparedness accessible, practical, and achievable for everyone. We believe that being prepared for emergencies shouldn't require specialized knowledge, expensive consultants, or fear-driven purchasing decisions.
Our free calculators help you determine exactly what your household needs—no more, no less. Whether you're building your first 72-hour kit or planning for extended self-sufficiency, our tools give you specific, actionable recommendations based on your unique situation.
What We Believe
Preparedness is Practical, Not Paranoid
We keep spare tires in our cars and smoke detectors in our homes. Emergency preparedness is the same common-sense approach applied to a broader set of potential disruptions. It's not about predicting disaster—it's about being ready for whatever comes.
Start Where You Are
You don't need to buy everything at once or achieve "perfect" preparedness. Start with water. Add food. Build over time. Our calculators help you prioritize what matters most for your situation.
Information Should Be Free
All of our calculators, guides, and tools are completely free. We believe everyone deserves access to the information they need to protect their families, regardless of budget.
Evidence Over Fear
Our recommendations are based on FEMA guidelines, Red Cross standards, and real-world disaster data—not fear-mongering or worst-case scenarios. We present facts and let you make informed decisions.
Our Calculators
Every calculator on DisasterPrepCalc is designed to answer a specific question:
- Water Storage: How much water does my household need?
- Food Storage: What food should I store and how much?
- Generator Sizing: What size generator do I need for my appliances?
- Power Runtime: How long will my generator or power station last?
- Emergency Kit: What should be in my emergency kit?
- Bug Out Bag: How do I build a portable evacuation kit?
- First Aid Kit: What medical supplies do I need?
- Preparedness Score: How prepared am I overall?
Each calculator provides personalized recommendations based on your household size, location, and specific needs. No generic one-size-fits-all answers.
Our Approach
Accuracy
We use data from FEMA, the American Red Cross, CDC, and other authoritative sources. Our formulas are based on established guidelines and real-world requirements.
Transparency
We show our work. When we recommend 1 gallon of water per person per day, we explain why. When we suggest generator sizes, we show the math.
Privacy
Our calculators run entirely in your browser. We don't collect or store your personal information, household details, or calculation results. See our Privacy Policy for details.
No Sales Pressure
We don't sell products or take commissions. Our recommendations are based purely on what you need, not what generates revenue for us.
Get Started
If you're new to emergency preparedness, we recommend starting with these steps:
- Calculate your water needs (the most critical supply)
- Take our preparedness assessment to identify gaps
- Review our 3-day prep guide for the basics
- Build gradually—even small steps make a difference
Contact Us
Have questions, suggestions, or feedback? We'd love to hear from you.