Generator tools

Two calculators that do the sizing and running-cost math honestly. Both run entirely in your browser, use clearly labeled typical estimates, and link their assumptions.

• Generator sizing calculator

  Tick the appliances you need to keep running; the calculator sums the running watts, adds the single largest starting surge, and recommends a generator size with 20% headroom — then points you at matching categories and models.

• Fuel cost comparison

  Gasoline vs propane vs natural gas: enter your local fuel prices and hours per day to see estimated daily and weekly running costs for a chosen generator class, derived from published spec-sheet consumption figures.

Estimates, not engineering: both tools state their assumptions inline, and the methodology page documents the formulas. Sizing a transfer switch, gas line, or standby installation is a job for licensed professionals.