Circumference of a 13 Centimeter Diameter Circle

What is the circumference of a circle with a diameter of 13 cm? How far around is a circle that is 13 centimeters across?

Diameter

meters

Units

Circumference of a 13cm 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
13.0 cm	40.84	16.08	1.340
13.1 cm	41.15	16.20	1.350
13.2 cm	41.47	16.33	1.361
13.3 cm	41.78	16.45	1.371
13.4 cm	42.10	16.57	1.381
13.5 cm	42.41	16.70	1.391
13.6 cm	42.73	16.82	1.402
13.7 cm	43.04	16.94	1.412
13.8 cm	43.35	17.07	1.422
13.9 cm	43.67	17.19	1.433
14.0 cm	43.98	17.32	1.443
14.1 cm	44.30	17.44	1.453
14.2 cm	44.61	17.56	1.464
14.3 cm	44.92	17.69	1.474
14.4 cm	45.24	17.81	1.484
14.5 cm	45.55	17.93	1.495
14.6 cm	45.87	18.06	1.505
14.7 cm	46.18	18.18	1.515
14.8 cm	46.50	18.31	1.525
14.9 cm	46.81	18.43	1.536
15.0 cm	47.12	18.55	1.546
15.1 cm	47.44	18.68	1.556
15.2 cm	47.75	18.80	1.567
15.3 cm	48.07	18.92	1.577
15.4 cm	48.38	19.05	1.587

Diameter	cm	in	ft
15.5 cm	48.69	19.17	1.598
15.6 cm	49.01	19.29	1.608
15.7 cm	49.32	19.42	1.618
15.8 cm	49.64	19.54	1.629
15.9 cm	49.95	19.67	1.639
16.0 cm	50.27	19.79	1.649
16.1 cm	50.58	19.91	1.659
16.2 cm	50.89	20.04	1.670
16.3 cm	51.21	20.16	1.680
16.4 cm	51.52	20.28	1.690
16.5 cm	51.84	20.41	1.701
16.6 cm	52.15	20.53	1.711
16.7 cm	52.46	20.66	1.721
16.8 cm	52.78	20.78	1.732
16.9 cm	53.09	20.90	1.742
17.0 cm	53.41	21.03	1.752
17.1 cm	53.72	21.15	1.763
17.2 cm	54.04	21.27	1.773
17.3 cm	54.35	21.40	1.783
17.4 cm	54.66	21.52	1.793
17.5 cm	54.98	21.64	1.804
17.6 cm	55.29	21.77	1.814
17.7 cm	55.61	21.89	1.824
17.8 cm	55.92	22.02	1.835
17.9 cm	56.23	22.14	1.845