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Law Supply, Inc.
Web Page - Circumference and Area of Circles Table

Dia.	Circum.	Area
1/64	.04909	.00019
1/32	.09818	.00077
3/64	.14726	.00173
1/16	.19635	.00307
3/32	.29452	.00690
1/8	.39270	.01227
5/32	.49087	.01917
3/16	.58905	.02761
7/32	.68722	.03758
1/4	.78540	.04909
9/32	.88357	.06213
5/16	.89175	.07670
11/32	1.0799	.09281
3/8	1.1781	.11045
13/32	1.2763	.12962
3/16	1.3744	.15033
15/32	1.4726	.17257
1/2	1.5708	.19635
17/32	1.6690	.22166
9/16	1.7671	.24850
19/32	1.8653	.27688
5/8	1.9635	.30680
21/32	2.0617	.33824
11/16	2.1598	.37122
23/32	2.2580	.40574
3/4	2.3562	.44179
25/32	2.4544	.47937
13/16	2.5525	.51849
27/32	2.6507	.55914
7/8	2.7489	.60132
29/32	2.8471	.64504
15/16	2.9452	.69030
31/32	3.0434	.73708
1	3.1416	.7854
1-1/16	3.3379	.8866
1-1/8	3.5343	.9940
1-3/16	3.7306	1.1075
1-1/4	3.9270	1.2272
1-5/16	4.1233	1.3530
1-3/8	4.3197	1.4849
1-7/16	4.5160	1.6230
1-1/2	4.7124	1.7671
1-9/16	4.9087	1.9175
1-5/8	5.1051	2.0739
1-11/14	5.3014	2.2365
1-3/4	5.4978	2.4053
1-13/16	5.6941	2.5802
1-7/8	5.8905	2.7612
1-15/16	6.0868	2.9483
2	6.2832	3.1416
2-1/16	6.4795	3.3410
2-1/8	6.6759	3.5466
2-3/16	6.8722	3.7583
2-1/4	7.0686	3.9761
2-5/16	7.2649	4.2000
2-3/8	7.4613	4.4301
2-7/16	7.6576	4.6664
2-1/2	7.8540	4.9087
2-9/16	8.0503	5.1572
2-5/8	8.2467	5.4119
2-11/16	8.4430	5.6727
2-3/4	8.6394	5.9396
2-13/15	8.8357	6.2126
2-7/8	9.0321	6.4918
2-15/16	9.2284	6.7771
3	9.4248	7.0686
3-1/16	9.6211	7.3662
3-1/8	9.8175	7.6699
3-3/16	10.014	7.9798
3-1/4	10.210	8.2958
3-5/16	10.407	8.6179
3-3/8	10.603	8.9462
3-7/16	10.799	9.2806
3-1/2	10.996	9.6211
3-9/16	11.192	9.9678
3-5/8	11.888	10.321
3-11/16	11.585	10.680
3-3/4	11.781	11.045
3-13/16	11.977	11.416
3-7/8	12174	11793
3-15/16	12.370	12.177
4	12.566	12.566
4-1/16	12.763	12.962
4-1/8	12.959	13.364
4-3/16	13.155	13.772
4-1/4	13.352	14.186
4-5/16	13.548	14.607
4-3/8	13.744	15.033
4-7/16	13.941	15.466
4-1/2	14.137	15.904
4-9/16	14.334	16.349
4-5/8	14.530	16.800
4-11/16	14.726	17.257
4-3/4	14.923	17.721
4-13/16	15.119	18.190
4-7/8	15.315	18.665
4-15/16	15.512	19.147
5	15.708	19.635
5-1/16	15.904	20.129
5-1/8	16.101	20.629
5-3/16	16.297	21.135
5-1/4	16.493	21.648
5-5/16	16.690	22.166
5-3/8	16.886	22.691
5-7/16	17.082	23.221
5-1/2	17.279	23.758
5-9/16	17.475	24.301
5-5/8	17.671	24.750
5-17/16	17.868	25.406
5-3/4	18.064	25.967
5-13/16	18.261	26.535
5-7/8	18.457	27.019
5-15/16	18.653	27.688
6	18.850	28.274
6-1/8	91.242	29.465
6-1/4	19.635	30.680
6-3/8	20.028	31.919
6-1/2	20.420	33.183
6-5/8	20.813	34.472
6-3/4	21.206	35.785
6-7/8	21.598	37.122
7	21.991	38.485
7-1/8	22.384	39.871
7-1/4	22.776	41.282
7-3/8	23.169	42.718
7-1/2	23.562	44.179
7-5/8	23.955	45.664
7-3/4	24.347	47.173
7-7/8	24.740	48.707
8	25.133	50.265
8-1/8	25.525	50.265
8-1/4	25.918	51.849
8-3/8	25.311	53.456
8-1/2	26.704	55.088
8-5/8	27.096	56.745
8-3/4	27.489	58.426
8-7/8	27.882	60.432
9	28.274	63.617
9-1/8	28.667	63.397
9-1/4	29.060	67.201
9-3/8	29.452	69.029
9-1/2	29.845	70.887
9-5/8	30.238	72.760
9-3/4	30.631	74.662
9-7/8	31.023	76.589
10	31.416	78.540
10-1/8	31.809	80.516
10-1/4	32.201	82.516
10-3/8	32.594	84.541
10-1/2	32.988	86.590
10-5/8	33.379	88.664
10-3/4	33.772	90.763
10-7/8	34.165	92.886
11	34.558	95.033
11-1/8	34.950	97.205
11-1/4	35.343	99.402
11-3/8	35.736	101.62
11-1/2	36.128	103.87
11-5/8	36.521	106.14
11-3/4	36.914	108.43
11-7/8	37.306	110.75
12	37..699	113.10
12-1/8	38.092	115.47
12-1/4	38.485	117.86
12-3/8	38.877	120.28
12-1/2	39.270	122.72
12-5/8	39.663	125.19
12-3/4	40.055	127.68
12-7/8	40.448	130.19
13	40.841	113.73
13-1/8	41.233	135.30
13-1/4	41.626	137.89
13-3/8	42.019	140.50
13-1/2	42.412	143.14
13-5/8	42.804	145.80
13-3/4	43.197	148.49
13-7/8	43.590	151.20
14	43.982	153.94
14-1/8	44.375	156.70
14-1/4	44.768	159.48
14-3/8	45.160	162.30
14-1/2	45.553	165.13
14-5/8	45.946	167.99
14-3/4	46.339	170.87
14-7/8	46.731	173.78
15	47.124	176.71
15-1/8	47.517	179.67
15-1/4	47.909	182.65
15-3/8	48.302	185.66
15-1/2	48.695	188.69
15-5/8	49.087	191.75
15-3/4	49.480	194.83
15-7/8	49.873	197.93
16	50.266	201.06
16-1/8	50.658	204.22
16-1/4	51.051	207.39
16-3/8	51.444	210.60
16-1/2	51.836	213.82
16-5/8	52.229	217.08
16-3/4	52.622	247.45
16-7/8	53.031	250.95
17	53.407	226.98
17-1/8	53.800	230.33
17-1/4	54.193	233.71
17-3/8	54.585	237.10
17-1/2	54.978	240.53
17-5/8	55.371	243.98
17-3/4	55.763	247.45
17-7/8	56.156	250.95
18	56.549	254.47
18-1/8	56.941	258.02
18-1/4	57.334	261.59
18-3/8	57.727	265.18
18-1/2	58.120	268.80
18-5/8	58.512	272.45
18-3/4	58.905	276.12
18-7/8	59.298	279.81
19	59.690	283.53
19-1/8	60.083	287.27
19-1/4	60.476	291.04
19-3/8	60.868	294.83
19-1/2	61.261	298.65
19-5/8	61.654	302.49
19-3/4	62.047	306.35
19-7/8	62.439	310.24
20	62.832	314.16
20-1/8	43.225	318.10
20-1/4	63.617	322.06
20-3/8	64.010	326.05
20-1/2	64.403	330.06
20-5/8	64.795	334.10
20-3/4	65.188	338.16
20-7/8	65.581	342.25
21	65.973	346.36
21-1/8	66.366	350.50
21-1/4	66.759	354.66
21-3/8	67.152	358.84
21-1/2	67.544	363.05
21-5/8	67.937	367.28
21-3/4	68.330	371.54
21-7/8	365.83	375.83
22	69.115	380.13
22	69.115	380.13
22-1/8	69.508	384.46
22-1/4	69.900	388.82
22-3/8	70.293	393.20
22-1/2	70.686	397.61
22-5/8	71.079	402.04
22-3/4	71.471	406.49
22-7/8	71.864	401.97
23	72.257	415.84
23-1/8	72.649	402.00
23-1/4	73.042	404.56
23-3/8	73.435	402.13
23-1/2	73.827	433.74
23-5/8	74.220	438.36
23-3/4	74.413	443.01
23-7/8	75.006	447.69
24	75.398	452.39
24-1/8	75.391	457.11
24-1/4	76.184	461.86
24-3/8	76.579	466.64
24-1/2	76.969	471.44
24-5/8	77.362	476.26
24-3/4	77.754	481.11
24-7/8	78.147	485.98
25	78.540	490.87
25-1/8	78.933	495.79
25-1/4	79.325	500.74
25-3/8	79.718	505.71
25-1/2	80.111	501.71
25-5/8	80.503	515.72
25-3/4	80.896	520.77
25-7/8	81.289	525.84
26	81.681	530.93
26-1/8	82.074	536.05
26-1/4	82.467	541.19
26-3/8	82.860	546.35
26-1/2	83.252	551.55
26-5/8	83.645	556.76
26-3/4	84.038	562.00
26-7/8	84.430	567.27
27	48.823	272.56
27-1/8	85.216	577.87
27-1/4	85.618	583.21
27-3/8	86.001	588.57
27-1/2	86.394	593.76
27-5/8	86.787	599.37
27-3/4	87.179	604.81
27-7/8	87.572	610.27
28	87.965	615.75
28-1/8	88.357	621.26
28-1/4	88.750	626.80
28-3/8	89.143	632.36
28-1/2	89.535	637.94
28-5/8	89.928	643.55
28-3/4	90.321	649.18
28-7/8	90.714	654.84
29	91.106	660.52
29-1/8	91.499	666.23
29-1/4	91.892	671.96
29-3/8	92.284	677.71
29-1/2	92.677	683.49
29-5/8	93.070	689.30
29-3/4	93.462	695.13
30	94.246	706.86

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Last updated 03/19/2005
This information is industrial standard and is for reference only.