Circles - Circumferences and Areas

Download and print Circumference and Area vs. Circle Diameter chart

Circumference and area vs circle diameter:

Diameter (in)	Circumference (in)	Area (in2)
1/64	0.049	0.00019
1/32	0.098	0.00077
3/64	0.147	0.0017
1/16	0.196	0.0031
3/32	0.295	0.0069
1/8	0.393	0.012
5/32	0.491	0.019
3/16	0.589	0.028
7/32	0.687	0.038
1/4	0.785	0.049
9/32	0.884	0.062
5/16	0.982	0.077
11/32	1.08	0.093
3/8	1.18	0.11
13/32	1.28	0.13
7/16	1.37	0.15
15/32	1.47	0.17
1/2	1.57	0.20
17/32	1.67	0.22
9/16	1.77	0.25
19/32	1.87	0.28
5/8	1.96	0.31
21/32	2.06	0.34
11/16	2.16	0.37
23/32	2.26	0.41
3/4	2.36	0.44
25/32	2.45	0.48
13/16	2.55	0.52
27/32	2.65	0.56
7/8	2.75	0.60
29/32	2.85	0.65
15/16	2.95	0.69
31/32	3.04	0.74
1 1/16	3.34	0.89
1 1/8	3.53	0.99
1 3/16	3.73	1.11
1 1/4	3.93	1.23
1 5/16	4.12	1.35
1 3/8	4.32	1.48
1 7/16	4.52	1.62
1 1/2	4.71	1.77
1 9/16	4.91	1.92
1 5/8	5.11	2.07
1 11/16	5.30	2.24
1 3/4	5.50	2.41
1 13/16	5.69	2.58
1 7/8	5.89	2.76
1 15/16	6.09	2.95
2 1/16	6.48	3.34
2 1/8	6.68	3.55
2 3/16	6.87	3.76
2 1/4	7.07	3.98
2 5/16	7.26	4.20
2 3/8	7.46	4.43
2 7/16	7.66	4.67
2 1/2	7.85	4.91
2 9/16	8.05	5.16
2 5/8	8.25	5.41
2 11/16	8.44	5.67
2 3/4	8.64	5.94
2 13/16	8.84	6.21
2 7/8	9.03	6.49
2 15/16	9.23	6.78
3 1/16	9.62	7.37
3 1/8	9.82	7.67
3 3/16	10.01	7.98
3 1/4	10.21	8.30
3 5/16	10.41	8.62
3 3/8	10.60	8.95
3 7/16	10.80	9.28
3 1/2	11.00	9.62
3 9/16	11.19	9.97
3 5/8	11.39	10.32
3 11/16	11.58	10.68
3 3/4	11.78	11.04
3 13/16	11.98	11.42
3 7/8	12.17	11.79
3 15/16	12.37	12.18
4 1/8	12.96	13.36
4 3/16	13.16	13.77
4 1/4	13.35	14.19
4 5/16	13.55	14.61
4 3/8	13.74	15.03
4 7/16	13.94	15.47
4 1/2	14.14	15.90
4 9/16	14.33	16.35
4 5/8	14.53	16.80
4 11/16	14.73	17.26
4 3/4	14.92	17.72
4 13/16	15.12	18.19
4 7/8	15.32	18.67
4 15/16	15.51	19.15
5 1/8	16.10	20.63
5 3/16	16.30	21.14
5 1/4	16.49	21.65
5 5/16	16.69	22.17
5 3/8	16.89	22.69
5 7/16	17.08	23.22
5 1/2	17.28	23.76
5 9/16	17.48	24.30
5 5/8	17.67	24.85
5 11/16	17.87	25.41
5 3/4	18.06	25.97
5 13/16	18.26	26.53
5 7/8	18.46	27.11
5 15/16	18.65	27.69
6 1/8	19.24	29.46
6 1/4	19.63	30.68
6 3/8	20.03	31.92
6 1/2	20.42	33.18
6 5/8	20.81	34.47
6 3/4	21.21	35.78
6 7/8	21.60	37.12
7 1/8	22.38	39.87
7 1/4	22.78	41.28
7 3/8	23.17	42.72
7 1/2	23.56	44.18
7 5/8	23.95	45.66
7 3/4	24.35	47.17
7 7/8	24.74	48.71
8 1/8	25.53	51.85
8 1/4	25.92	53.46
8 3/8	26.31	55.09
8 1/2	26.70	56.75
8 5/8	27.10	58.43
8 3/4	27.49	60.13
8 7/8	27.88	61.86
9 1/8	28.67	65.40
9 1/4	29.06	67.20
9 3/8	29.45	69.03
9 1/2	29.85	70.88
9 5/8	30.24	72.76
9 3/4	30.63	74.66
9 7/8	31.02	76.59
10 1/8	31.81	80.52
10 1/4	32.20	82.52
10 3/8	32.59	84.54
10 1/2	32.99	86.59
10 5/8	33.38	88.66
10 3/4	33.77	90.76
10 7/8	34.16	92.89

• 1 in (inch) = 25.4 mm
• 1 in² = 645.2 mm² = 6.452 cm² = 6.452x10^-4 m²

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