<PAGE> 1
EXHIBIT 11
SI DIAMOND TECHNOLOGY, INC.
COMPUTATION OF INCOME (LOSS) PER COMMON SHARE
<TABLE>
<CAPTION>
Three Months ended March 31,
-----------------------------------
2000 1999
------------ ------------
<S> <C> <C>
Computation of income ( loss ) per common share:
Net income (loss) applicable to common stockholders $ (1,854,686) $ 3,332,039
Weighted average number of common shares
outstanding 54,236,200 47,798,022
Net income (loss) per common share $ (0.03) $ 0.07
Computation of income ( loss ) per common share assuming full dilution:
Net income (loss) applicable to common stockholders -- 3,332,039
Plus: Income impact of assumed conversions
Preferred stock dividends -- 38,945
Interest on convertible notes -- 21,834
Income available to common stockholders
assuming conversion -- 3,392,818
Weighted average number of common
Shares outstanding -- 47,798,022
Plus incremental shares from dilutive securities
Convertible preferred stock -- 1,959,297
Convertible notes payable -- 2,435,660
Warrants -- 246,616
Options -- 2,413,357
Adjusted weighted average number of
common shares -- 54,852,952
Net income (loss) per common share -- 0.06
</TABLE>
No computation of diluted loss per common share is included for the 2000 period
because such Computation results in an antidilutive loss per common share.