About GeneratorSizer

Free sizing tools, computed from published engineering rules of thumb — not blog-filler guesses.

GeneratorSizer is built and maintained by Jeremy Panasuk, a data-platforms engineer (19 of 20 Fortune-100 accounts recovered over 19 years of Informatica work) who now runs a private RTX 4070 lab in New Auburn, Wisconsin and builds the calculators he wished existed when sizing his own gear.

Every number on this site comes from a published source — DOE/EIA energy content figures, NEC load rules, manufacturer spec sheets, AWS welding charts — and the calculator does the arithmetic the articles only describe. When the sources disagree, we say so instead of rounding silently.

Questions, corrections, or a sizing scenario the calculator doesn't cover: [email protected].