Circumference of a 40 Foot Diameter Circle

What is the circumference of a circle with a diameter of 40 ft? How far around is a circle that is 40 feet across?

Diameter

meters

Units

Circumference of a 40′ diameter circle

results may be rounded

The circumference of a circle is pi times its diameter.

Circumference = π * Diameter

The diameter of a circle is the distance from one edge to the other, passing through the center. It is twice the radius.

Circle Circumference by Diameter

results may be rounded

Diameter	ft	in	m
40′0″	125.7	1,508	38.30
40′1″	125.9	1,511	38.38
40′2″	126.2	1,514	38.46
40′3″	126.4	1,517	38.54
40′4″	126.7	1,521	38.62
40′5″	127.0	1,524	38.70
40′6″	127.2	1,527	38.78
40′7″	127.5	1,530	38.86
40′8″	127.8	1,533	38.94
40′9″	128.0	1,536	39.02
40′10″	128.3	1,539	39.10
40′11″	128.5	1,543	39.18