The Floor Area by Dimension calculator computes the floor area of a rectangular room based on the length and width of the room.
INSTRUCTIONS: Choose units and enter the following:
- (L) Length of Room
- (W) Width of Room
Total Floor Area (A): The calculator returns the total area in square feet and square meters. However, this can be automatically converted compatible units via the pull-down menu.
The Math / Science
The formula for the area of a rectangular room is:
A = L ⋅ W
where:
- A = Floor Area of Room
- L = Length of Room
- W = Width of Room
Room Floor Area Calculators
- Area of Room's Floor - Area of Floor in Rectangular Room
- Area of Room's Floor with Angled Bump-out - Area of Floor in Rectangular Room with Angled Bump-out
- Area of Room's Floor with Squared Bump-out - Area of Floor in Rectangular Room with Squared Bump-out
Most rooms are simple rectangles with a length and a width. The only common departure are rooms with bump-outs. Some bump-outs are angular and taper down from an opening. Some bump-outs have squared corners. To compute the square feet of these floors are simple geometry based on the measurements of the main floor and the bump-out dimensions.
To compute the area of a floor with a different shape (e.g., circular, oval, or polygon), see the Area Calculator.