EXHIBIT 11 BUCKEYE PARTNERS, L.P. COMPUTATION OF EARNINGS PER UNIT (In thousands, except for Units and per Unit amounts) (Unaudited) Quarter Ended Nine Months Ended September 30, September 30, ---------------------- ---------------------- 1997 1996 1997 1996 ------ ------ ------ ------ Net Income $ 12,730 $ 12,017 $ 35,637 $ 33,934 Primary earnings per Unit Net income $ 0.98 $ 0.99 $ 2.86 $ 2.78 Fully-diluted earnings per Unit Net income $ 0.98 $ 0.99 $ 2.86 $ 2.78 Weighted average number of Units outstanding: Units outstanding at Sept. 30 12,894,686 12,177,799 12,426,356 12,170,470 Exercise of Options reduced by the number of Units purchased with proceeds (Primary) 40,883 16,726 32,901 18,737 ---------- ---------- ---------- ---------- Total Units outstanding -Primary 12,935,569 12,194,525 12,459,257 12,189,207 ========== ========== ========== ========== Units outstanding at Sept. 30 12,894,686 12,177,799 12,426,356 12,170,470 Exercise of Options reduced by the number of Units purchased with proceeds (fully-diluted) 40,887 18,808 42,890 21,826 ---------- ---------- ---------- --------- Total Units outstanding- Fully-diluted 12,935,573 12,196,607 12,469,246 12,192,296 ========== ========== ========== ========== Although not required to be presented in the income statement under provisions APB Opinion No. 15, this calculation is submitted in accordance with Regulations S-K item 601(b)(11).