Circumference of a 45 Centimeter Diameter Circle

What is the circumference of a circle with a diameter of 45 cm? How far around is a circle that is 45 centimeters across?

Diameter

meters

Units

Circumference of a 45cm 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	cm	in	ft
45.0 cm	141.4	55.66	4.638
45.1 cm	141.7	55.78	4.648
45.2 cm	142.0	55.91	4.659
45.3 cm	142.3	56.03	4.669
45.4 cm	142.6	56.15	4.679
45.5 cm	142.9	56.28	4.690
45.6 cm	143.3	56.40	4.700
45.7 cm	143.6	56.52	4.710
45.8 cm	143.9	56.65	4.721
45.9 cm	144.2	56.77	4.731
46.0 cm	144.5	56.89	4.741
46.1 cm	144.8	57.02	4.752
46.2 cm	145.1	57.14	4.762
46.3 cm	145.5	57.27	4.772
46.4 cm	145.8	57.39	4.782
46.5 cm	146.1	57.51	4.793
46.6 cm	146.4	57.64	4.803
46.7 cm	146.7	57.76	4.813
46.8 cm	147.0	57.88	4.824
46.9 cm	147.3	58.01	4.834
47.0 cm	147.7	58.13	4.844
47.1 cm	148.0	58.26	4.855
47.2 cm	148.3	58.38	4.865
47.3 cm	148.6	58.50	4.875
47.4 cm	148.9	58.63	4.886

Diameter	cm	in	ft
47.5 cm	149.2	58.75	4.896
47.6 cm	149.5	58.87	4.906
47.7 cm	149.9	59.00	4.916
47.8 cm	150.2	59.12	4.927
47.9 cm	150.5	59.24	4.937
48.0 cm	150.8	59.37	4.947
48.1 cm	151.1	59.49	4.958
48.2 cm	151.4	59.62	4.968
48.3 cm	151.7	59.74	4.978
48.4 cm	152.1	59.86	4.989
48.5 cm	152.4	59.99	4.999
48.6 cm	152.7	60.11	5.009
48.7 cm	153.0	60.23	5.020
48.8 cm	153.3	60.36	5.030
48.9 cm	153.6	60.48	5.040
49.0 cm	153.9	60.61	5.050
49.1 cm	154.3	60.73	5.061
49.2 cm	154.6	60.85	5.071
49.3 cm	154.9	60.98	5.081
49.4 cm	155.2	61.10	5.092
49.5 cm	155.5	61.22	5.102
49.6 cm	155.8	61.35	5.112
49.7 cm	156.1	61.47	5.123
49.8 cm	156.5	61.60	5.133
49.9 cm	156.8	61.72	5.143