Generator calculator
Installed Cost Estimator
Estimate an installed standby generator cost range by kW tier and selected transfer switch or gas line needs.
Screening estimate only.These calculators use only the values you enter. A licensed electrician's load calculation is authoritative before equipment is selected or installed.
Screening result
Fine Print and Sources
Screening estimate only. These tools use only the values you enter and simple planning math. A licensed electrician's load calculation is authoritative for equipment selection, transfer equipment, permitting, fuel piping, and final installation scope.
Installed cost ranges use ProjectCostPro's 2026 cost aggregator bands for complete standby generator installs by kW tier. The transfer switch and gas line adders are included only when you select those inputs.
- ProjectCostPro whole-house generator cost guide: provides the 2026 installed cost ranges used for the kW tier estimator.