Reference Info
Circumferences and Areas of Circles
| Diameter (inches) | Circumference (inches) | Area (Sq. in.) |
|---|---|---|
| 63 3/4 | 200.27653 | 3191.90727 |
| 63 7/8 | 200.66923 | 3204.43683 |
| 64 | 201.06193 | 3216.99092 |
| 64 1/8 | 201.45463 | 3229.56957 |
| 64 1/4 | 201.84733 | 3242.17275 |
| 64 3/8 | 202.24003 | 3254.80048 |
| 64 1/2 | 202.63273 | 3267.45276 |
| 64 5/8 | 203.02543 | 3280.12957 |
| 64 3/4 | 203.41813 | 3292.83094 |
| 64 7/8 | 203.81083 | 3305.55684 |
| 65 | 204.20353 | 3318.30729 |
| 65 1/8 | 204.59622 | 3331.08228 |
| 65 1/4 | 204.98892 | 3343.88182 |
| 65 3/8 | 205.38162 | 3356.70590 |
| 65 1/2 | 205.77432 | 3369.55452 |
| 65 5/8 | 206.16702 | 3382.42769 |
| 65 3/4 | 206.55972 | 3395.32540 |
| 65 7/8 | 206.95242 | 3408.24765 |
| 66 | 207.34512 | 3421.19445 |
| 66 1/8 | 207.73782 | 3434.16579 |
| 66 1/4 | 208.13052 | 3447.16168 |
| 66 3/8 | 208.52322 | 3460.18211 |
| 66 1/2 | 208.91591 | 3473.22708 |
| 66 5/8 | 209.30861 | 3486.29660 |
| 66 3/4 | 209.70131 | 3499.39066 |
| 66 7/8 | 210.09401 | 3512.50926 |
| 67 | 210.48671 | 3525.65241 |
| 67 1/8 | 210.87941 | 3538.82010 |
| 67 1/4 | 211.27211 | 3552.01233 |
| 67 3/8 | 211.66481 | 3565.22911 |
| 67 1/2 | 212.05751 | 3578.47043 |
| 67 5/8 | 212.45021 | 3591.73630 |
| 67 3/4 | 212.84291 | 3605.02671 |
| 67 7/8 | 213.23560 | 3618.34166 |
| 68 | 213.62830 | 3631.68116 |
| 68 1/8 | 214.02100 | 3645.04520 |
| 68 1/4 | 214.41370 | 3658.43379 |
| 68 3/8 | 214.80640 | 3671.84691 |
| 68 1/2 | 215.19910 | 3685.28459 |
| 68 5/8 | 215.59180 | 3698.74680 |
| 68 3/4 | 215.98450 | 3712.23356 |
| 68 7/8 | 216.37720 | 3725.74486 |
| 69 | 216.76990 | 3739.28071 |
| 69 1/8 | 217.16260 | 3752.84110 |
| 69 1/4 | 217.55529 | 3766.42604 |
| 69 3/8 | 217.94799 | 3780.03551 |
| 69 1/2 | 218.34069 | 3793.66953 |
| 69 5/8 | 218.73339 | 3807.32810 |
| 69 3/4 | 219.12609 | 3821.01121 |
| 69 7/8 | 219.51879 | 3834.71886 |
| 70 | 219.91149 | 3848.45106 |
| 70 1/8 | 220.30419 | 3862.20780 |
| 70 1/4 | 220.69689 | 3875.98908 |
| 70 3/8 | 221.08959 | 3889.79491 |
| 70 1/2 | 221.48229 | 3903.62528 |
| 70 5/8 | 221.87498 | 3917.48019 |
| 70 3/4 | 222.26768 | 3931.35965 |
| 70 7/8 | 222.66038 | 3945.26365 |
| 71 | 223.05308 | 3959.19220 |
| 71 1/8 | 223.44578 | 3973.14529 |
| 71 1/4 | 223.83848 | 3987.12292 |
| 71 3/8 | 224.23118 | 4001.12510 |
| 71 1/2 | 224.62400 | 4015.20000 |
| 71 5/8 | 225.01658 | 4029.20308 |
| 71 3/4 | 225.40928 | 4043.27889 |
| 71 7/8 | 225.80198 | 4057.37924 |
| 72 | 226.19467 | 4071.50414 |
| 72 1/8 | 226.58737 | 4085.65358 |
| 72 1/4 | 226.98007 | 4099.82756 |
| 72 3/8 | 227.37277 | 4114.02609 |
| 72 1/2 | 227.76547 | 4128.24916 |
| 72 5/8 | 228.15817 | 4142.49677 |
| 72 3/4 | 228.55087 | 4156.76893 |
| 72 7/8 | 228.94357 | 4171.06563 |
| 73 | 229.33627 | 4185.38687 |
| 73 1/8 | 229.72897 | 4199.73266 |
| 73 1/4 | 230.12167 | 4214.10300 |
| 73 3/8 | 230.51436 | 4228.49787 |
| 73 1/2 | 230.90706 | 4242.91729 |
| 73 5/8 | 231.29976 | 4257.36125 |
| 73 3/4 | 231.69246 | 4271.82976 |
| 73 7/8 | 232.08516 | 4286.32281 |
| 74 | 232.47786 | 4300.84041 |
| 74 1/8 | 232.87056 | 4315.38254 |
| 74 1/4 | 233.26326 | 4329.94923 |
| 74 3/8 | 233.65596 | 4344.54045 |
| 74 1/2 | 234.04866 | 4359.15622 |
| 74 5/8 | 234.44136 | 4373.79653 |
| 74 3/4 | 234.83405 | 4388.46139 |
| 74 7/8 | 235.22675 | 4403.15079 |
| 75 | 235.61945 | 4417.86473 |
| 75 1/8 | 236.01215 | 4432.60322 |
| 75 1/4 | 236.40485 | 4447.36625 |
| 75 3/8 | 236.79755 | 4462.15383 |
| 75 1/2 | 237.19025 | 4476.96595 |
| 75 5/8 | 237.58295 | 4491.80261 |
| 75 3/4 | 237.97565 | 4506.66382 |
| 75 7/8 | 238.36835 | 4521.54957 |
| 76 | 238.76105 | 4536.45986 |
| 76 1/8 | 239.15374 | 4551.39470 |
| 76 1/4 | 239.54644 | 4566.35408 |
| 76 3/8 | 239.93914 | 4581.33800 |
| 76 1/2 | 240.33184 | 4596.34647 |
| 76 5/8 | 240.72454 | 4611.37948 |
| 76 3/4 | 241.11724 | 4626.43704 |
| 76 7/8 | 241.50994 | 4641.51914 |
| 77 | 241.90264 | 4656.62578 |
| 77 1/8 | 242.29534 | 4671.75697 |
| 77 1/4 | 242.68804 | 4686.91270 |
| 77 3/8 | 243.08074 | 4702.09297 |
| 77 1/2 | 243.47343 | 4717.29779 |
| 77 5/8 | 243.86613 | 4732.52715 |
| 77 7/8 | 244.65153 | 4763.05950 |
| 78 | 245.04423 | 4778.36250 |
| 78 1/8 | 245.43693 | 4793.69003 |
| 78 1/4 | 245.82963 | 4809.04211 |
| 78 3/8 | 246.22233 | 4824.41874 |
| 78 1/2 | 246.61503 | 4839.81990 |
| 78 5/8 | 247.00773 | 4855.24561 |
| 78 3/4 | 247.40043 | 4870.69587 |
| 78 7/8 | 247.79312 | 4886.17067 |
| 79 | 248.18582 | 4901.67001 |
| 79 1/8 | 248.57852 | 4917.19390 |
| 79 1/4 | 248.97122 | 4932.74233 |
| 79 3/8 | 249.36392 | 4948.31530 |
| 79 1/2 | 249.75662 | 4963.91282 |
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