<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 NOVEMBER 25, 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> NOV-25-2000
<CASH> 533,118
<SECURITIES> 0
<RECEIVABLES> 1,687,521
<ALLOWANCES> 57,000
<INVENTORY> 1,121,466
<CURRENT-ASSETS> 3,465,626
<PP&E> 3,772,900
<DEPRECIATION> 3,031,434
<TOTAL-ASSETS> 4,506,890
<CURRENT-LIABILITIES> 1,929,420
<BONDS> 0
0
0
<COMMON> 53,207
<OTHER-SE> 2,329,081
<TOTAL-LIABILITY-AND-EQUITY> 4,506,890
<SALES> 3,006,195
<TOTAL-REVENUES> 3,006,195
<CGS> 1,954,993
<TOTAL-COSTS> 1,034,989
<OTHER-EXPENSES> 0
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 3,797
<INCOME-PRETAX> (119,074)
<INCOME-TAX> 0
<INCOME-CONTINUING> (119,074)
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> (119,074)
<EPS-BASIC> (.05)
<EPS-DILUTED> (.05)
</TABLE>