10 MISC. PUBLICATION 225, U. S. DEPT. OF AGRICTTLTUBE 



Table 18. — Basal area in square feet from given diameters of 0.1 to 60 inches 1 



Diameter, 

 inches 



Area of 

 circle 



Diameter, 

 inches 



Area of 

 circle 



Diameter, 

 inches 



Area of 

 circle 



Diameter, 

 inches 



Area of 

 circle 



1 



Sq.ft. 

 0.0001 

 .0002 

 . 0005- 

 .0009 

 .0014 

 .0020 

 .0027 

 . 0035- 

 .0044 

 .0055- 

 .0066 

 .0079 

 .0092 

 .0107 

 .0123 

 .0140 

 .0158 

 .0177 

 .0197 

 .0218 

 .0241 

 .0264 

 .0289 

 .0314 

 .0341 

 .0369 

 .0398 

 .0428 

 .0459 

 .0491 

 .0524 

 . 0559 

 .0594 

 .0631 

 .0668 

 .0707 

 .0747 

 .0788 

 .0830 

 .0873 

 .0917 

 .0962 

 .1008 

 .1056 

 .1104 

 .1154 

 . 1205- 

 . 1257 

 .1310 

 .1364 

 .1419 

 . 1475- 

 .1532 

 .1590 

 .1650 

 .1710 

 .1772 

 . 1835- 

 .1899 

 .1963 

 .2029 

 .2097 

 . 2165- 

 .2234 

 .2304 

 .2376 

 .2448 

 .2522 

 . 2597 

 .2673 

 .2749 

 .2827 

 .2907 

 .2987 

 .3068 

 .3150 

 .3234 

 .3318 



7.9. 



Sq.ft. 

 0.3404 



.3491 



.3578 



.3667 



.3757 



.3848 



.3941 



.4034 



.4128 



.4224 



.4320 



.4418 



.4517 



.4616 



.4717 



.4819 



.4922 



.5027 



.5132 



.5238 



.5346 



.5454 



.5564 



. 5675- 



.5786 



.5899 



.6013 



.6128 



.6244 



.6362 



.6480 



.6600 



.6 7 20 



.6842 



.6964 



.7088 



.7213 



.7339 



.7466 



.7594 



.7724 



.7854 



.'7985+ 



.8118 



.8252 



.8386 



.8522 



.8659 



.8797 



.8936 



.9076 



.9218 



.9360 



.9503 



.9648 



.9793 



.9940 

 1.0088 

 1. 0237 

 1. 0387 

 1. 0538 

 1. 0690 

 1. 0843 

 1. 0998 

 1. 1153 

 1. 1310 

 1. 1467 

 1. 1626 

 1. 1786 

 1. 1947 

 1.2109 

 1. 2272 

 1. 2436 

 1. 2601 

 1. 2768 

 1. 2935+ 

 1. 3104 

 1. 3273 



15.7 



Sq.ft. 

 1.3444 

 1.3616 

 1. 3789 

 1. 3963 

 1. 4138 

 1. 4314 

 1.4491 

 1. 4669 

 1. 4849 

 1. 5029 

 1. 5211 

 1. 5394 

 1. 5578 

 1. 5763 

 1. 5948 

 1.6136 

 1. 6324 

 1.6513 

 1. 6703 

 1.6895- 

 1. 7087 

 1. 7281 

 1. 7476 

 1. 7671 

 1. 7868 

 1. 8066 

 1. 8265+ 

 1.8466 

 1. 8667 

 1. 8869 

 1. 9073 

 1. 9277 

 1. 9483 

 1. 9689 



1. 9897 



2. 0106 

 2.0316 

 2. 0527 

 2. 0739 

 2. 0953 

 2. 1167 

 2. 1382 

 2. 1599 

 2. 1817 

 2. 2035+ 

 2. 2255+ 

 2. 2476 

 2. 2698 

 2. 2921 



2. 3145+ 

 2. 3371 

 2. 3597 

 2.3824 

 2. 4053 

 2. 4282 

 2.4513 

 2.4745- 

 2. 4978 

 2. 5212 

 2. 5447 

 2. 5683 

 2. 5920 

 2. 6159 

 2. 6398 

 2. 6639 

 2. 6880 

 2. 7123 

 2. 7367 

 2. 7612 

 2. 7858 

 2.8105- 

 2. 8353 

 2. 8602 

 2. 8852 

 2. 9104 

 2. 9356 

 2. 9610 

 2. 9865- 



23.5 



Sq.ft. 

 3. 0121 



0.2 - - 



8- 



15.8 



23.6 



3. 0377 



0.3 



8.1 



15.9 



23.7 



3. 0635+ 

 3. 0895— 



0.4 



8.2 



16 



23.8 



0.5 



8.3 



16.1 



23.9 



3. 1155— 



0.6 



8.4 



16.2. .- 



24-— 



3. 1416 



07 



8.5 



16.3 



24.1—- 



3. 1678 



0.8 



8.6 



16.4 .. 



24.2 



3. 1942 



0.9 



8.7 - 



16.5 



24.3 



3. 2206 



1 -- 



8.8 



16.6 



24.4 



3. 2472 



1.1 



8.9 . 



16.7 



24.5. . 



3. 2739 



1.2 



9 



16.8 



24.6 



3.3006 



1.3_ 



9.1 



16.9 



24.7 



3. 3275+ 



1 4_ 



9.2 



17 



24.8 



3. 3545+ 



1.5 



9.3 



17.1 



24.9 _ 



3. 3816 



1.6 



9.4 



17.2 



25.— 



3. 4088 



1.7 



9.5- . 



17.3 



25.1 



3. 4362 



1.8 



9.6 



17.4 



25.2 



3. 4636 



1.9 



9.7 - - 



17.5 



25.3. 



3. 4911 



2~. 



9.8 



17.6 



25.4 



25.5 



25.6 



25.7 



25.8 



25.9 



26 - - 



3. 5188 



2.1 



9.9 



17.7. --_ --- 



3 5466 



2.2 



10- 



17.8 



3. 5744 



2.3 



10.1 



17.9 



3. 6024 



2.4 



10.2 



18 



3. 6305+ 



2 5 



10.3 



18.1 - - 



3 6587 



2 6 



10.4 



18.2 



3. 6870 



2.7 



10.5 



18.3. 



26.1 



26.2 



26.3 



26.4 



26.5 



26.6 



26.7 



26.8 



26.9 



27 



3. 7154 



2 8 



10.6 



18.4 - - 



3 7439 



2.9 



10.7 



18.5 -- 



3. 7726 



3 ._ 



10.8 



18.6 



3. 8013 



3.1 



10.9 



18.7 



3. 8302 



3.2 



11 



18.8 



3. 8591 



3.3 



11.1 



18.9 



3. 8882 



3 4 



11.2 



19 



3. 9-L74-^ 



3.5 



11.3 



19.1 



3. 9467 



3.6 -- 



11.4 



19.2 



3. 9761 





11.5 



19.3 



27.1 



27.2 



27.3 



27.4 



27.5 



27.6 



27.7 



27.8 



27.9 



28 



28.1 



28.2 



28.3 



28 4 



28 5 



286 



28.7 



4. 0056 



3.8 



11.6 



19.4 ... 



4. 0352 



3.9 



11.7 



19.5 



4. 0649 



4. 



11.8 



19.6 



4. 0948 



4.1 



11.9 



19.7 



4. 1247 



4.2 



12 



19.8 - 



4. 1548 



4.3 - 



12.1 



19.9 



4. 1849 



4.4 . 



12.2 



20 



4. 2152 



4.5 . 



12.3 



20.1 



4. 2456 



4.6 -- 



12.4 



20.2 



4. 2761 



4.7 



12.5 



20.3 



4. 3067 



4.8 - 



12.6 



20.4 



4. 3374 



4.9 



12.7 



20.5 



4. 3682 



5 . ... 



12.8 - --- 



20.6 



4. 3991 



5.1 



12.9 



20.7 



4. 4301 



5.2 



13 . 



20.8 . - 



4.4613 



5.3 



13.1 



20.9. 



4. 4925+ 



5.4 



13.2 



13.3 



13.4 



13.5 



13.6 



13.7 



13.8 



13.9 



14 



14.1 



14.2 



14.3 



14.4 



14.5 



14.6 



14.7 



14.8 



14.9 



15 



15.1 



15.2 



15.3 



15.4 



15.5 



15.6 



21 



28.8 



28.9 



4. 5239 



5.5 



21.1 



4. 5554 



5.6 



21.2 



29 



4. 5869 



5.7 



21.3- 



29.1 



4. 6186 



5.8 



21.4 



29.2 



4.6504 



5.9 - 



21.5 



29 3 



4. 6823 



6- , -- - --- 



21.6 



29.4 



4. 7144 



6.1 



21.7 



29 5 



4. 7465— 



6.2 



21.8 



29.6 



4. 7787 



6.3 



21.9 



29.7 



4.8111 



6.4 



22 



22.1 



22.2 



22.3 



22.4 



22.5 



22.6 



22.7 



22.8 



22.9 



23 



23.1 



23.2 



23.3 



23.4 



29.8 



4. 8435+ 



6.5 -- 



29 9 



4. 8761 



6.6 



30 



4. 9087 



6.7- - - 



30 1 



4. 9415+ 



6.8 .- 



30 2 



4.9744 



6.9 - - 



3Q.3 



5. 0074 



7 



30 4 



5 0405+ 



7.1-. 



30 5 



5. 0737 



7.2 - - 



30 6 



5 1071 



7.3 



30.7 



5. 1405- 



7.4 



30 8 



5. 1740 



7.5 



30.9 



5. 2077 



7.6 



31 



31 1 



5. 2414 



7.7 - . 



5. 2753 



7.8 



31.2 



5. 3093 



1 tt=3. 1415926536; basal area in sq. ft. =0.0054541539/ (0.005454154) times the square of the diameter in 

 inches. 



