Exhibit 12.01 BROOKS AUTOMATION, INC. CALCULATION OF RATIO OF EARNINGS TO FIXED CHARGES AND PREFERRED DIVIDENDS AND ACCRETION (DOLLARS IN THOUSANDS EXCEPT RATIOS) Year ended September 30, -------------------------------------------------------------------- 2001 2000 1999 1998 1997 -------- -------- -------- -------- -------- FIXED CHARGES Interest expense $ 4,063 $ 1,345 $ 1,553 $ 2,347 $ 1,730 Portion of rent expense representative of interest 1,600 1,933 1,633 1,781 1,332 -------- -------- -------- -------- -------- 5,663 3,278 3,186 4,128 3,062 Preferred dividend and accretion requirement 145 194 1,248 2,484 1,815 -------- -------- -------- -------- -------- Combined fixed charges and preferred dividends and accretion $ 5,808 $ 3,472 $ 4,434 $ 6,612 $ 4,877 ======== ======== ======== ======== ======== EARNINGS Income (loss) before income taxes and minority interests $(36,523) $ 28,444 $(10,448) $(27,917) $ (2,857) Fixed charges per above 5,808 3,472 4,434 6,612 4,877 -------- -------- -------- -------- -------- $(30,715) $ 31,916 $ (6,014) $(21,305) $ 2,020 ======== ======== ======== ======== ======== Ratio of earnings to combined fixed charges and preferred dividends and accretion --(A) 9.2 --(B) --(C) --(D) ======== ======== ======== ======== ======== Coverage deficiency $(36,523) $ -- $(10,448) $(27,917) $ (2,857) ======== ======== ======== ======== ======== (A) Earnings were insufficient to cover fixed charges by $36,523,000 in fiscal 2001. (B) Earnings were insufficient to cover fixed charges by $10,448,000 in fiscal 1999. (C) Earnings were insufficient to cover fixed charges by $27,917,000 in fiscal 1998. (D) Earnings were insufficient to cover fixed charges by $2,857,000 in fiscal 1997.