EXHIBIT 11 HOWELL CORPORATION COMPUTATION OF EARNINGS PER SHARE (UNAUDITED) THREE MONTHS ENDED MARCH 31, 1997 1996 --------- --------- (In thousands, except per share amounts) PRIMARY EARNINGS PER SHARE COMPUTATION FOR STATEMENT OF EARNINGS Reconciliation of net income per statement of earnings to amount used in calculation of earnings per share - assuming no dilution: Net earnings................................................................. $ 1,402 $ 1,195 Subtract - Dividend to preferred shareholders................................ 604 604 --------- --------- Net earnings, as adjusted.................................................... $ 798 $ 591 ========= ========= Weighted average number of common shares outstanding..................................................................... 4,985 4,934 ========= ========= Earnings per share - assuming no dilution (a)..................................... $ .16 $ .12 ========= ========= ADDITIONAL PRIMARY COMPUTATION Net earnings, as adjusted per primary computation above............................................................... $ 798 $ 591 ========= ========= Adjustment to weighted average number of shares outstanding: Weighted average number of shares outstanding per primary computation above.............................................. 4,985 4,934 Add - Dilutive effect of outstanding options (as determined by application of the treasury stock method).............................................................. 90 100 --------- --------- Weighted average number of shares outstanding, as adjusted................................................................ 5,075 5,034 ========= ========= Primary earnings per share, as adjusted (b)....................................... $ .16 $ .12 ========= ========= THREE MONTHS ENDED MARCH 31, 1997 1996 --------- --------- (In thousands, except per share amounts) FULLY DILUTED EARNINGS PER SHARE COMPUTATION FOR STATEMENT OF EARNINGS Net earnings, as adjusted per primary computation above....................................................... $ 798 $ 591 ========= ========= Weighted average number of common shares outstanding, per primary computation above...................................... 4,985 4,934 ========= ========= Earnings per share - assuming full dilution (a).................................................................... $ .16 $ .12 ========= ========= ADDITIONAL FULLY DILUTED COMPUTATION Additional adjustment to net earnings, as adjusted per fully diluted computation above: Net earnings, as adjusted per fully diluted computation above.................................................. $ 798 $ 591 Add - Dividend to preferred shareholders..................................... 604 604 --------- --------- Net earnings, as adjusted.................................................... $ 1,402 $ 1,195 ========= ========= Additional adjustment to weighted average number of shares outstanding: Weighted average number of shares outstanding, per fully diluted computation above........................................ 4,985 4,934 Add - Dilutive effect of outstanding options (as determined by the application of the treasury stock method).............................................................. 90 100 Shares issuable from assumed exercise of convertible preferred stock............................................... 2,090 2,090 --------- --------- Weighted average number of common shares, as adjusted................................................................. 7,165 7,124 ========= ========= Fully diluted earnings per share (c).............................................. $ .20 $ .17 ========= ========= (a) These amounts agree with the reported amounts on the statements of earnings. (b) This calculation is submitted in accordance with Regulation S-K item 601(b)(11) although not required by footnote 2 to paragraph 14 of APB Opinion No. 15 because it results in dilution of less than 3%. (c) This calculation is submitted in accordance with Regulation S-K item 601(b)(11) although it is contrary to paragraph 40 of APB Opinion No. 15 because it produces an anti-dilutive result.