Square Footage Calculator
length
width
What to measure
Shape
Rectangle
Wall with openings
Border around a rectangle
Trapezoid — gable end or sloped ceiling
Circle
Ring — a path around a circle
Triangle, base and height
Triangle, three sides measured
Length
ft
inch
yd
m
cm
Accepts 12' 6", 12ft 6in, or 12.5.
Width
ft
inch
yd
m
cm
Number of identical areas
Waste factor
percent
10% for straight-lay, 15% for diagonal, 20% for herringbone.
Price per square foot
usd
Leave at zero to skip the cost. Flooring is priced per square foot and sold by the carton.
Area to order
140.9 sq ft
13.1 square meters
Show the work
Square Footage Calculator
by Rule Calculator