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`A = L * W `

Enter a value for all fields

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 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

- 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.