Square Footage of a 20 × 40 ft Rectangle
"Square Footage Calculator" Calculator
How many square feet is 20 × 40 ft?
Answer
A rectangle of 20 × 40 ft covers
800 square feet
Any rectangle 20 ft wide and 40 ft long covers 800 square feet. The order of the sides makes no difference — 20 × 40 and 40 × 20 are the same area.
How the Square Footage Is Calculated
Square feet = width (ft) × length (ft)
Area is a product, not a sum: a rectangle holds as many one-foot squares as its width multiplied by its length. Put this rectangle into it:
20 ft × 40 ft
=20 × 40
=800 square feet
20 × 40 ft in Other Units
The same rectangle expressed the other common ways. The perimeter is the figure to use for skirting, edging or fencing — and it is what tells this rectangle apart from other sizes with the same area.
| Square feet | 800 square feet |
| Square meters | 74.32 m² |
| Square yards | 88.89 yd² |
| Perimeter | 120 ft |
Note: this is floor area. Wall area is height × length for each wall, and a room that is not a plain rectangle has to be split into rectangles first and added up.
Related Calculations
See Also
- Square Feet to Square Meters (Sq Ft to Sq M) - Convert Square Feet to Square Meters
- Square Meters to Square Feet (Sq M to Sq Ft) - Convert Square Meters to Square Feet
- Square Inches to Square Centimeters - Convert Square Inches to Square Centimeters
- Square Centimeters to Square Inches - Convert Square Centimeters to Square Inches
- Square Feet to Acres - Convert Square Feet to Acres
- Acres to Square Feet - Convert Acres to Square Feet
- Square Kilometers to Square Miles - Convert Square Kilometers to Square Miles
- Square Miles to Square Kilometers - Convert Square Miles to Square Kilometers
- Acres to Hectares - Convert Acres to Hectares
- Hectares to Acres - Convert Hectares to Acres
- Square Meters to Hectares - Convert Square Meters to Hectares
- Hectares to Square Meters - Convert Hectares to Square Meters
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Square Footage for a 20 ft Side
| Size | Square Feet | Square Meters |
|---|---|---|
| 20 × 21 ft | 420 square feet | 39.02 m² |
| 20 × 22 ft | 440 square feet | 40.88 m² |
| 20 × 23 ft | 460 square feet | 42.74 m² |
| 20 × 24 ft | 480 square feet | 44.59 m² |
| 20 × 25 ft | 500 square feet | 46.45 m² |
| 20 × 26 ft | 520 square feet | 48.31 m² |
| 20 × 27 ft | 540 square feet | 50.17 m² |
| 20 × 28 ft | 560 square feet | 52.03 m² |
| 20 × 29 ft | 580 square feet | 53.88 m² |
| 20 × 30 ft | 600 square feet | 55.74 m² |
| 20 × 31 ft | 620 square feet | 57.6 m² |
| 20 × 32 ft | 640 square feet | 59.46 m² |
| 20 × 33 ft | 660 square feet | 61.32 m² |
| 20 × 34 ft | 680 square feet | 63.17 m² |
| 20 × 35 ft | 700 square feet | 65.03 m² |
| 20 × 36 ft | 720 square feet | 66.89 m² |
| 20 × 37 ft | 740 square feet | 68.75 m² |
| 20 × 38 ft | 760 square feet | 70.61 m² |
| 20 × 39 ft | 780 square feet | 72.46 m² |
| 20 × 40 ft | 800 square feet | 74.32 m² |
| 20 × 42 ft | 840 square feet | 78.04 m² |
| 20 × 44 ft | 880 square feet | 81.75 m² |
| 20 × 46 ft | 920 square feet | 85.47 m² |
| 20 × 48 ft | 960 square feet | 89.19 m² |
| 20 × 50 ft | 1,000 square feet | 92.9 m² |
| 20 × 55 ft | 1,100 square feet | 102.19 m² |
| 20 × 60 ft | 1,200 square feet | 111.48 m² |
| 20 × 70 ft | 1,400 square feet | 130.06 m² |
| 20 × 80 ft | 1,600 square feet | 148.64 m² |
| 20 × 100 ft | 2,000 square feet | 185.81 m² |
About "Square Footage Calculator" Calculator
This calculator works out the square footage of a rectangle from its two sides in feet. For example, it can help you find out how many square feet is 20 × 40 ft? (The answer is: 800 square feet). Enter the width (e.g. 20 ft) and the length (e.g. 40 ft) in feet — half-feet and decimals such as 10.5 are accepted.