Area of Circles

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Diameter INCHES Diameter
Dec. Frac. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Dec. Frac
0 0 - .7854 3.1416 7.0686 12.566 19.635 28.74 38.485 50.266 63.617 78.540 95.033 113.10 132.73 153.94 176.71 201.06 226.98 0 0
.0156 1/64 .000192 .8101 3.1909 7.1424 12.665 19.735 28.422 38.656 50.462 63.838 78.785 95.303 113.39 113.39 154.28 177.08 201.45 227.40 .0156 1/64
.0312 1/32 .000767 .8352 3.2405 7.2166 12.763 18.881 28.570 38.829 50.659 64.060 79.031 95.574 113.69 133.37 154.63 177.45 201.85 227.82 .0312 1/32
.0468 3/64 .001726 .8607 3.2906 7.2912 12.863 20.005 28.718 39.002 50.856 64.282 79.278 95.845 113.98 133.69 154.97 177.82 202.24 228.23 .0468 3/64
.0625 1/16 .003068 .8866 3.3410 7.3662 12.962 20.129 28.866 39.175 51.054 64.504 79.525 96.116 114.23 134.01 155.32 178.19 202.64 228.65 .0625 1/16
.0781 5/64 .004794 .8929 3.3918 7.4415 13.062 20.253 29.015 39.348 51.252 64.727 79.772 96.388 114.57 134.33 155.66 178.56 203.03 229.07 .0781 5/64
.0937 3/32 .006903 .9306 3.4430 7.5173 13.162 20.378 29.1652 39.552 51.450 64.950 80.019 96.660 114.87 134.65 156.01 178.93 203.43 229.49 .0937 3/32
.1093 7/64 .009396 .9666 3.4946 7.5934 13.263 20.503 29.315 39.696 51.649 64.173 80.267 96.932 115.17 134.98 156.35 179.30 203.82 229.91 .1093 7/64
.1250 1/8 .01227 .9940 3.5466 7.6699 13.364 20.629 29.465 39.871 51.849 65.397 80.516 97.205 115.47 135.30 156.70 179.67 204.22 230.33 .1250 1/8
.1406 9/64 .01553 1.0218 3.5989 7.7468 13.465 20.755 29.615 40.046 52.048 65.621 80.764 97.479 115.76 135.62 157.05 180.04 204.61 230.75 .1406 9/64
.1562 5/32 .01917 1.0500 3.6516 7.8241 13.567 20.881 29.766 40.222 52.248 65.845 81.013 97.752 116.06 135.94 157.39 180.42 205.01 231.17 .1562 5/32
.1718 11/64 .02370 1.0786 3.7048 7.9017 13.669 21.008 29.917 40.398 52.448 66.070 81.263 98.026 116.36 136.27 157.74 180.79 205.40 231.59 .1718 11/64
.1875 3/16 .02761 1.1075 3.7583 7.9798 13.772 21.135 30.054 40.574 52.649 66.296 81.513 98.301 116.66 135.69 158.09 181.16 205.80 232.01 .1875 3/16
.2031 13/64 .03240 1.1369 3.8121 8.0582 13.875 21.263 30.221 40.750 52.850 66.521 81.763 98.575 116.96 136.91 158.44 181.53 206.20 232.44 .2031 13/64
.2187 7/32 .03758 1.1666 3.8664 8.1370 13.978 21.391 30.374 40.927 53.052 66.747 82.014 98.850 117.26 137.24 158.79 181.91 206.60 232.86 .2187 7/32
.2343 15/64 .04314 1.1967 3.9211 8.2162 14.082 21.519 30.526 41.105 530254 66.974 82.265 99.126 117.56 137.56 159.14 182.28 206.99 233.28 .2343 15/64
.2500 1/4 .04909 1.2272 3.9761 8.2958 14.186 21.648 30.680 41.282 530456 67.201 82.516 99.402 117.86 137.89 159.48 182.65 207.39 233.71 .2500 1/4
.2656 17/64 .05541 1.2577 4.0315 8.3757 14.291 21.777 30.833 41.461 53.659 67.428 82.768 99.678 118.16 138.21 159.83 183.03 207.79 234.13 .2656 17/64
.2812 9/32 .06213 1.2893 4.0873 8.4561 14.396 21.906 30.987 41.639 53.862 67.655 83.020 99.955 118.46 138.54 160.19 183.40 208.19 234.55 .2812 9/32
.2968 19/64 .06922 1.3209 4.1435 8.5368 14.501 22.036 31.141 41.818 54.065 67.883 83.272 100.23 118.76 138.86 160.54 183.78 208.59 234.98 .2968 19/64
.3125 5/16 .07670 1.3530 4.2000 8.6179 14.607 22.166 31.296 41.997 54.269 68.112 83.525 100.51 119.06 139.19 160.89 184.15 208.99 235.40 .3125 5/16
.3281 21/64 .08456 1.3854 4.2750 8.6994 14.713 22.297 31.451 42.177 54.473 68.341 83.779 100.79 119.37 139.52 161.24 184.53 209.39 235.83 .3281 21/64
.3437 11/32 .09281 1.4182 4.3143 8.7813 14.819 22.428 31.607 42.357 54.678 68.570 84.032 101.07 119.67 139.84 161.59 184.91 209.79 236.25 .3437 11/32
.3593 23/64 .1014 1.4513 4.3720 8.8636 14.926 22.559 31.763 42.537 54.883 68.799 84.286 101.34 119.97 104.17 161.94 185.28 210.20 236.68 .3593 23/64
.3750 3/8 .1104 1.4849 4.4301 8.9462 15.033 22.691 31.919 42.718 55.088 69.029 84.541 101.62 120.28 104.50 162.30 185.66 210.60 237.10 .3750 3/8
.3906 25/64 .1198 1.5188 4.4886 9.0292 15.141 22.823 32.076 42.899 55.294 69.259 84.796 101.90 120.58 140.83 162.65 186.04 211.00 238.53 .3906 25/64
.4062 13/32 .1296 1.5532 4.5475 9.1126 15.249 22.955 32.233 43.081 55.500 69.490 85.051 102.18 120.88 141.16 163.00 186.42 211.40 237.96 .4062 13/32
.4218 27/64 .1398 1.5879 4.6067 9.1964 15.357 23.088 32.390 43.263 55.707 69.721 85.306 102.46 121.19 141.49 163.36 186.79 211.80 238.39 .4218 27/64
.4375 7/16 .1503 1.6230 4.6664 9.2806 15.466 23.221 32.548 43.445 55.914 69.953 85.562 102.74 121.49 141.82 163.71 187.17 212.21 238.81 .4375 7/16
.4531 29/64 .1613 1.6584 4.7264 9.3652 15.575 23.335 32.706 43.628 56.121 70.184 85.819 103.02 121.80 142.15 164.06 187.55 212.61 239.24 .4531 29/64
.4687 15/32 .1726 1.6943 4.7868 9.4501 15.684 23.489 32.865 43.811 56.329 70.417 86.075 103.31 122.11 142.48 164.42 187.93 213.02 239.67 .4687 15/32
.4843 31/64 .1843 1.7305 4.8476 9.5354 15.794 23.623 33.024 43.995 56.537 70.649 86.333 103.59 122.43 142.81 164.77 188.31 213.42 240.10 .4843 31/64
.5000 1/2 .1903 1.7671 4.9083 9.6212 15.904 23.758 33.183 44.179 56.745 70.882 86.590 103.87 122.72 143.14 165.13 188.69 213.82 240.53 .5000 1/2
.5156 33/64 .2088 1.8042 4.9703 9.7072 16.015 28.893 33.343 44.363 56.954 71.116 86.848 104.15 123.03 143.47 165.49 189.07 214.23 240.96 .5156 33/64
.5312 17/32 .2217 1.8415 5.0322 9.7937 16.126 24.029 33.503 44.548 57.163 71.349 87.106 104.43 123.33 143.80 165.84 189.45 214.64 241.39 .5312 17/32
.5468 35/64 .2349 1.8793 5.0946 9.8806 16.237 24.165 33.663 44.733 57.373 71.583 87.365 104.72 123.64 144.13 166.20 189.83 215.04 241.82 .5468 35/64
.5625 9/16 .2485 1.9175 5.1573 9.9678 16.349 24.301 33.824 44.918 57.583 71.818 87.624 105.00 123.95 144.47 166.56 190.22 215.45 242.25 .5625 9/16
.5781 37/64 .2625 1.9560 5.2203 10.055 16.461 24.438 33.985 45.104 57.793 72.053 87.883 105.29 124.26 144.80 166.91 190.60 215.85 242.68 .5781 37/64
.5937 19/32 .2769 1.9949 5.2838 10.143 16.574 24.575 34.147 45.290 58.004 72.288 88.143 105.57 124.57 145.13 167.27 190.98 216.26 243.11 .5937 19/32
.6093 39/64 .2916 2.0342 5.3477 10.232 16.687 24.713 34.309 45.477 58.215 72.524 88.404 105.80 124.88 145.47 167.63 191.36 216.67 243.54 .6093 39/64
.6250 5/8 .3068 2.0739 5.4119 10.321 16.800 24.850 34.472 45.664 58.426 72.760 88.664 106.14 125.19 145.80 167.99 191.75 217.08 243.98 .6250 5/8
.6406 41/64 .3223 2.1140 5.4765 10.410 16.914 24.989 34.634 45.851 58.638 72.996 88.925 106.43 125.50 146.14 168.35 192.13 217.48 244.41 .6406 41/64
.6562 21/32 .3882 2.1545 5.5415 10.499 17.028 25.127 34.798 46.039 58.850 73.233 89.186 106.71 125.81 146.47 168.71 192.52 217.89 244.84 .6562 21/32
.6718 43/64 .3545 2.1953 5.6069 10.589 17.142 25.266 34.961 46.227 59.063 73.470 89.448 106.99 126.12 146.81 169.07 192.90 218.30 245.28 .6718 43/64
.6875 11/16 .3712 2.2365 5.6727 10.679 17.257 25.406 35.125 46.415 59.276 73.708 89.710 107.28 126.43 147.14 169.43 193.28 218.71 245.71 .6875 11/16
.7031 45/64 .3883 2.2782 5.7388 10.770 17.372 25.546 35.289 46.604 59.489 73.946 89.973 107.57 126.74 147.48 169.79 193.67 219.12 246.14 .7031 45/64
.7187 23/32 .4067 2.3201 5.8054 10.861 17.488 25.686 35.454 46.793 59.703 74.184 90.236 107.86 127.05 147.82 170.15 194.06 219.53 246.58 .7187 23/32
.7343 47/64 .4236 2.3623 5.8723 10.953 17.604 25.826 35.619 46.983 59.917 74.423 90.499 108.15 127.36 148.15 170.51 194.44 219.94 247.01 .7343 47/64
.7500 11/16 .4418 2.4053 5.9396 11.045 17.721 25.967 35.785 47.173 60.132 74.662 90.763 108.43 127.68 148.49 170.87 194.83 220.35 247.45 .7500 3/4
.7656 49/64 .4604 2.4484 6.0073 11.137 17.837 26.108 35.951 47.363 60.347 74.901 91.027 108.72 127.99 148.83 171.24 195.21 220.76 247.89 .7656 49/64
.7812 25/32 .4794 2.4929 6.0753 11.229 17.954 26.250 36.117 47.554 60.562 75.141 91.291 109.01 128.30 149.17 171.60 195.60 221.18 248.32 .7812 25/32
.7968 51/64 .4987 2.5359 6.1438 11.324 18.072 26.392 36.283 47.745 60.778 75.382 91.556 109.30 128.62 149.50 171.96 195.99 221.59 248.76 .7968 51/64
.8125 3/4 .5185 2.5802 6.2126 11.416 18.190 26.535 36.450 47.937 60.994 75.622 91.821 109.59 128.93 149.84 172.32 196.38 222.00 249.20 .8125 13/16
.8281 53/64 .5386 2.6248 6.2819 11.509 18.308 26.678 36.618 48.129 61.211 75.863 92.087 109.88 129.25 150.18 172.69 196.77 222.41 249.63 .8281 53/64
.8437 27/32 .5591 2.6669 6.3515 11.604 18.427 26.821 36.787 48.321 61.427 76.105 92.353 110.17 129.56 150.52 173.05 197.15 222.83 250.07 .8437 27/32
.8593 55/64 .5800 2.7153 6.4215 11.698 18.546 26.964 36.954 48.514 61.645 76.346 92.619 110.46 129.88 150.86 173.42 197.54 223.24 250.51 .8593 55/64
.8750 13/16 .6013 2.7612 6.4918 11.793 18.665 27.109 37.122 48.707 61.862 76.589 92.886 110.75 130.19 151.20 173.78 197.93 223.65 250.95 .8750 7/8
.8906 57/64 .6230 2.8074 6.5626 11.889 18.785 27.252 37.291 48.900 62.080 76.831 93.153 111.04 130.51 151.54 174.15 198.32 224.07 251.39 .8906 57/64
.9062 29/32 .6450 2.8540 6.6337 11.984 18.906 27.398 37.461 49.094 62.229 77.074 93.420 111.34 130.82 151.88 174.51 198.71 224.48 251.83 .9062 29/32
.9218 59/64 .6675 2.9010 6.7052 12.080 19.026 27.543 37.630 49.288 62.518 77.317 93.688 111.63 131.14 152.22 174.88 199.10 224.90 252.26 .9218 59/64
.9375 15/16 .6903 2.9483 6.7771 12.176 19.147 27.688 37.800 49.483 62.737 77.561 93.956 111.92 131.46 152.57 175.25 199.49 225.31 252.70 .9375 15/16
.9531 61/64 .7135 2.9961 6.8494 12.274 19.268 27.834 37.971 49.678 62.956 77.805 94.225 112.22 131.76 152.91 175.61 199.89 225.73 253.15 .9531 61/64
.9687 31/32 .7371 3.0442 6.9221 12.371 19.390 27.981 38.142 49.874 63.176 78.050 94.494 112.51 132.09 153.25 175.98 200.28 226.15 253.59 .9687 31/32
.9843 63/64 .7610 3.0927 6.9952 12.468 19512 28.127 38.313 50.069 63.396 78.295 94.763 112.80 132.41 153.59 176.35 200.67 226.56 254.03 .9843 63/64

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