Free Disaster Recovery Tools & Calculators

How to use these disaster recovery calculators

These tools support the full lifecycle of disaster response and recovery - from the first hours of an incident through long-term rebuilding. Each calculator uses current FEMA program rules, SBA loan terms, and NFIP rate structures so applicants and emergency managers get accurate estimates before they file.

FEMA Public Assistance and grants

FEMA Public Assistance is the largest source of post-disaster funding for state and local governments and eligible nonprofits. The cost documentation tool structures expenses into the PA project categories - emergency protective measures (Category B), debris removal (Category A), and permanent work (Categories C through G) - which is exactly how FEMA reviewers evaluate submissions. The HMGP benefit-cost ratio calculator uses FEMA's Benefit-Cost Analysis methodology to determine whether a mitigation project clears the 1.0 BCR threshold required for funding. Fire departments and law enforcement agencies that deploy under mutual aid during a declared disaster should document costs using the mutual aid reimbursement tool, which formats expenses for PA Category B submission.

Operations and shelter

The shelter capacity calculator follows American Red Cross standards (10 square feet per evacuee for short-term, 20 for longer stays) and outputs the maximum safe occupancy for any facility floor plan. Military installations activated under a state emergency declaration frequently serve as overflow shelters and staging areas - the EOC staffing tool accounts for unified command structures that include both civilian and military personnel. The debris removal estimator uses FEMA's cost-per-cubic-yard rates by debris type, which differ significantly between vegetative debris, construction and demolition material, and hazardous waste.

Finance, loans, and flood insurance

The SBA disaster loan calculator covers both physical damage loans and Economic Injury Disaster Loans (EIDL), including the interest rate tiers that apply depending on whether the applicant has credit available elsewhere. Nonprofit organizations are eligible for SBA physical damage loans but not EIDLs. The NFIP flood insurance estimator uses elevation certificate inputs and flood zone classification to project annual premiums, which is the same data FEMA uses to rate policies under Risk Rating 2.0.