<PAGE>
Exhibit 11.1
(1 of 2)
Castle Energy Corporation
Statement of Computation of Earnings Per Share
(Dollars in thousands, except per share amounts)
(Unaudited)
<TABLE>
<CAPTION>
Three Months Ended June 30,
2000 1999
-------------------------------- -------------------------------
Basic Diluted Basic Diluted
------- --------- ------- ---------
<S> <C> <C> <C> <C>
I. Shares Outstanding, Net of Treasury
Stock Purchased and Options Exercised During
the Period:
Stock, net 7,012,887 7,012,887 7,803,087 7,803,087
Options exercised (weighted) 2,475 2,475
Purchase of treasury stock (weighted) (146,530) (146,530) (16,626) (16,626)
---------- ---------- ---------- ----------
6,866,357 6,866,357 7,788,936 7,788,936
II. Weighted Equivalent Shares:
Assumed options and warrants exercised 110,857 142,218
---------- ----------- ---------- ----------
III. Weighted Average Shares and Equivalent Shares 6,866,351 6,977,214 7,788,936 7,931,154
========== ========== ========== ==========
IV. Net Income Loss $ 1,024 $ 1,024 $ 900 $ 900
========== ========== ========== ==========
V. Net Income Per Share $ .15 $ .15 $ .12 $ .11
========== ========== ========== ==========
</TABLE>
<PAGE>
Exhibit 11.1
(2 of 2)
Castle Energy Corporation
Statement of Computation of Earnings Per Share
(Dollars in thousands, except per share amounts)
(Unaudited)
<TABLE>
<CAPTION>
Nine Months Ended June 30,
2000 1999
-------------------------------- -------------------------------
Basic Diluted Basic Diluted
------- --------- ------- ---------
<S> <C> <C> <C> <C>
I. Shares Outstanding, Net of Treasury
Stock Purchased and Options Exercised
During the Period:
Stock, net 7,639,287 7,639,287 8,822,187 8,822,187
Options exercised (weighted) 825 825
Purchase of treasury stock (weighted) (638,240) (638,240) (455,496) (455,496)
---------- ---------- ---------- ----------
7,001,047 7,001,047 8,367,516 8,367,516
II. Weighted Equivalent Shares:
Assumed options and warrants exercised 143,321 148,875
---------- ---------- ---------- ----------
III. Weighted Average Shares and Equivalent Shares 7,001,047 7,144,368 8,367,516 8,516,391
========== ========== ========== ==========
IV. Net Income $ 1,006 $ 1,006 $ 7,349 $ 7,349
========== ========== ========== ==========
V. Net Income Per Share $ .14 $ .14 $ .88 $ .86
========== ========== ========== ==========
</TABLE>