<PAGE>
EXHIBIT 11
BHA Group Holdings, Inc.
Computation of Per Share Earnings
(in thousands of dollars, except per share data)
<TABLE>
<CAPTION>
2000 1999 1998
------------------------------- ------------------------------- ---------------------------------
Net Earnings Shares Per-Share Net Earnings Shares Per-Share Net Earnings Shares Per-Share
(Numerator) (Denom.) Amt. (Numerator) (Denom.) Amt. (Numerator) (Denom.) Amt.
----------- -------- ---- ----------- -------- ---- ----------- -------- ----
<S> <C> <C> <C> <C> <C> <C> <C> <C> <C>
Basic earnings per share:
Earnings available to common
shareholders $6,016 6,601 $0.91 $1,084 7,028 $0.15 $7,332 7,171 $1.02
Effect of dilutive
securities--stock options -- 71 -- 106 -- 381
Diluted earnings per
share: Earnings
available to common
shareholders and assumed
conversion $6,016 6,672 $0.90 $1,084 7,134 $ 0.15 $7,332 7,552 $0.97
========================== ========================== ==========================
</TABLE>
