Calculators

Generator calculators

Load lists, sizing, fuel and runtime, installation budget, running cost, and maintenance, each with visible math.

Calculator

Generator Availability Calculator

Turn MTBF, repair time, and test hours into availability and the expected hours a site is left unserved.

Calculator

Estimate the voltage dip when a block of load transfers and compare it with the ISO 8528-5 performance class the site needs.

Calculator

How many sets in parallel for the load, what each carries, and what still runs with one set down.

Calculator

Size a battery bank for a critical load and an autonomy target, then check how long the generator takes to recharge it.

Calculator

Pick the ATS amperage, pole count, and rating type from the load and the service configuration.

Calculator

Size the alternator end, not just the engine: power factor, non-linear load, and starting kVA all land on the winding.

Calculator

See how loaded a set will actually run, and whether a light load puts it into wet-stacking territory.

Calculator

Map the application and hours to the ISO 8528 rating to specify and the NEC article that governs the installation.

Calculator

Turn a required kW into the residential or light-commercial size class you can actually buy, with the ATS and breaker that go with it.

Calculator

Check a portable generator's running and surge ratings against the appliances you want, and see exactly which combination fits.