ENERCALC INC. (Formerly ENERCALC Engineering Software) was formed in 1983 by Michael D. Brooks, a California registered Civil and Structural engineer.

The initial software offering was a simple set of fill-in-the-blank engineering calculation templates using the Lotus 1-2-3 spreadsheet. Over the next 10 years the Structural Engineering Library grew into an extensive system providing calculation ability for common engineering design tasks.

Between 1994 and 1997 the software was rewritten to be independent of Lotus, then in 1996/1997 a complete rewrite was completed for 32bit Windows operating systems. Between 2003 and 2007 the entire system was completely rewritten again to set a basis for the next decade of ENERCALC software offerings.

ENERCALC, INC is a closely held California Subchapter S Corporation.