<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM LANGER
BIOMECHANICS GROUP, INC.'S FORM 10-Q FOR THE QUARTER ENDED MAY 27, 2000 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS AND NOTES,
THERETO.
</LEGEND>
<S> <C>
<PERIOD-TYPE> 3-MOS
<FISCAL-YEAR-END> FEB-28-2001
<PERIOD-END> MAY-27-2000
<CASH> 699,301
<SECURITIES> 0
<RECEIVABLES> 1,540,846
<ALLOWANCES> 64,226
<INVENTORY> 1,100,926
<CURRENT-ASSETS> 3,489,549
<PP&E> 3,762,050
<DEPRECIATION> 2,904,575
<TOTAL-ASSETS> 4,646,822
<CURRENT-LIABILITIES> 1,891,991
<BONDS> 0
0
0
<COMMON> 52,807
<OTHER-SE> 2,427,018
<TOTAL-LIABILITY-AND-EQUITY> 4,646,822
<SALES> 2,769,695
<TOTAL-REVENUES> 2,769,695
<CGS> 1,750,583
<TOTAL-COSTS> 1,052,710
<OTHER-EXPENSES> 0
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 5,875
<INCOME-PRETAX> (43,923)
<INCOME-TAX> 0
<INCOME-CONTINUING> (43,923)
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> (43,923)
<EPS-BASIC> (0.02)
<EPS-DILUTED> (0.02)
</TABLE>