Tools
Free tools
A free tool built on official guidance, plus our state-by-state directory.
How our tools work
The safe room size calculator uses FEMA's minimum usable floor area per occupant for residential safe rooms.
Enter how many people will shelter for the FEMA P-320 / ICC 500 minimum floor area.
Nothing you type into a tool is saved on our servers unless the tool says so. Letter builders and checklists run entirely in your browser.