Work out smoke alarm quantity instantly with clear inputs, formula shown and shareable results.
Standard guidance places an alarm inside every bedroom, on every floor including basements, and in each hallway or landing outside sleeping areas. Sensors degrade, so alarms have a ten year service life regardless of battery state, which is the maintenance item most households miss entirely.
Alarm count
alarms = bedrooms + floors + hallways and landings
alarms = bedrooms + floors + hallways and landings. Standard guidance places an alarm inside every bedroom, on every floor including basements, and in each hallway or landing outside sleeping areas.
Sensors degrade, so alarms have a ten year service life regardless of battery state, which is the maintenance item most households miss entirely.
Enter bedrooms, floors in the home, hallways and landings. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.