The answer depends on what the "16 inch" refers to.
The circumference of circle with a diameter of 16 inches is: 50.27 inches.
Circumference of a circle = (diameter) x (pi) = 16 pi = 50.265 inches (rounded)
Circumference of a circle = pi*diameter Circumference = 50.26548246 or 50 to the nearest inch
Circumference = (pi) x (Diameter) = 16 pi = 50.2655 inches (rounded)
The circumference of a 7-inch circle is: 21.99
The circumference of a 6-inch circle is: 18.85 inches.
The circumference of a 46-inch circle is: 144.5 inches.
The circumference of a 3.5 inch circle is: 10.996 inches.
The circumference of a 6-inch circle is: 18.85 inches.
The circumference of a 42-inch diameter circle is: ~131.95 inches.
The circumference of a 10 inch circle is: 31.416 inches(circumference = diameter x pi).