How Many Square Feet in a 10 x 40 Foot Room?

Calculate an area based on the dimensions in feet.
Area Based on Dimensions
feet
inches

feet
inches
Results
Square Feet
Acres
Square Meters
Dimensions in Meters
Hectares
Football Fields
Basketball Courts
How big is an area of 10ft by 40ft?
A 10 x 40 area is 400 sq feet. This could be used to calculate the square footage of any rectangular area such as a living room, bathroom, backyard, park, or floor area. Square footage is also commonly used to estimate the cost of material needed for painting, flooring, and other types of construction.
How many square meters are in a 10 foot by 40 foot area?
There are about 10.7639 ft2 in a m2. In an area of 10ft by 40ft, there are 37.16 square meters.
Square Footage Based on Dimensions
Dimensions 40 ft 41 ft 42 ft 43 ft 44 ft 45 ft 46 ft 47 ft 48 ft 49 ft
10 ft 400 410 420 430 440 450 460 470 480 490
11 ft 440 451 462 473 484 495 506 517 528 539
12 ft 480 492 504 516 528 540 552 564 576 588
13 ft 520 533 546 559 572 585 598 611 624 637
14 ft 560 574 588 602 616 630 644 658 672 686
15 ft 600 615 630 645 660 675 690 705 720 735
16 ft 640 656 672 688 704 720 736 752 768 784
17 ft 680 697 714 731 748 765 782 799 816 833
18 ft 720 738 756 774 792 810 828 846 864 882
19 ft 760 779 798 817 836 855 874 893 912 931
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