backup generator sizing

Generator Capacity Margin Calculator: Find Maximum Additional Electrical Load Allowed Instantly

Wondering how much extra power your system can safely support? Our generator capacity margin calculator gives an instant, easy-to-understand answer so you can plan loads and upgrades with confidence.

Free Instant Generator kW & kVA Calculator — Size Your Generator from Load kW + Power Factor

Need to size a generator fast? Our free instant generator kVA calculator converts your load kW and power factor into the right kW and kVA rating in seconds.

Accurately Size Your Standby Generator: Load-List Calculator for Running + Starting Watts

Get precise standby generator sizing with our easy load-list calculator that accounts for both running and starting watts. Know exactly what capacity you need to keep lights, HVAC, and critical appliances running during an outage.