Fire Door Rating Calculator

Required fire rating from wall construction and occupancy.

Wall fire rating (hours)

Wall type

Occupant load served

Door style

Door width (inches)

Door height (inches)

Tab to move between fields

Required door rating (minutes)

Required door rating (hours)1.5

Wall rating (hours)2

Max glazing area (sq in)100

Panic hardware requiredYes

Self-closing requiredYes

Positive latching requiredYes

Temperature rise limit requiredYes

Leaf area (sq ft)21

Exceeds max leaf sizeNo

How to Use This Calculator

Enter Wall fire rating (hours), Wall type, and Occupant load served.
Set Door style, Door width (inches), and Door height (inches).
Review the Required door rating (minutes) result.
Use Required door rating (hours) and Wall rating (hours) to inform your decision.

How the result changes with Wall fire rating (hours)

Wall fire rating (hours)	Required door rating (minutes)
0.4	20
1.4	45
2.6	90
3.6	180

Wall fire rating (hours): Fire-resistance rating of the wall assembly the door is installed in (hours).
Wall type: 1=Fire Wall, 2=Fire Barrier, 3=Fire Partition, 4=Smoke Barrier, 5=Corridor Wall.
Occupant load served: Number of occupants served by this door opening (affects panic hardware requirement).
Door style: 1=Swinging, 2=Sliding, 3=Rolling Steel.
Door width (inches): Width of a single door leaf in inches.
Door height (inches): Height of the door leaf in inches.

Required door rating (minutes): Minimum fire-resistance rating for the door assembly per IBC Table 716.1.
Required door rating (hours): Door rating expressed in hours.
Wall rating (hours): Input wall fire-resistance rating for reference.
Max glazing area (sq in): Maximum vision panel glazing area. 100 sq in for ratings >45 min unless fire-resistive glazing is used.
Panic hardware required: Whether fire exit hardware is required (occupant load >= 50) per IBC 1010.1.10.
Self-closing required: All fire door assemblies must be self-closing per NFPA 80.
Positive latching required: Fire doors must latch positively per NFPA 80 Section 6.1.4.
Temperature rise limit required: Whether door must limit temp rise to 450 deg F at 30 min (exit enclosure doors).
Leaf area (sq ft): Calculated area of the specified door leaf.
Exceeds max leaf size: Whether the leaf exceeds typical listing limits.

Identify Input Parameters
4 parameters
Wall fire rating (hours) = 2, Wall type = 2, Occupant load served = 50, Door style = 1 = 6 input(s) provided
Calculate Required door rating
Required door rating
90 = 90
Calculate Required door rating
Required door rating
1.5 = 1.5
Calculate Wall rating
Wall rating
2 = 2