Interior Design & Planning
Room Area & Volume Calculator
Calculate floor area, wall area, ceiling area, and volume for any room.
Room Dimensions
Room Length
ft
Length of the room
Room Width
ft
Width of the room
Room Height
ft
Height of the room (floor to ceiling)
Shape & Openings
Room Shape
Shape affects area calculation
Number of Doors
doors
Average door area: 21 sq ft (7'×3')
Number of Windows
windows
Average window area: 12 sq ft (4'×3')
Area
0
Floor Area
0 sq ft
total floor space
Wall Area
0 sq ft
Ceiling Area
0 sq ft
Room Volume
0 cu ft
Net Wall Area
0 sq ft
📊 Detailed Breakdown
| Category | Value | Unit |
|---|
How the formula works
Floor Area = Length × Width | Wall Area = 2 × (Length + Width) × Height − (Doors × 21 + Windows × 12) | Volume = Length × Width × Height
- Floor Area = Length × Width
- Ceiling Area = Length × Width (same as floor area)
- Wall Area = 2 × (Length + Width) × Height
- Net Wall Area = Wall Area − (Doors × 21 + Windows × 12)
- Room Volume = Length × Width × Height
- L-Shape Area = (Length × Width) + (Extra Length × Extra Width)
- Door area: 21 sq ft (7' × 3'), Window area: 12 sq ft (4' × 3')
- Square rooms have equal length and width