Generator Size Calculator
Estimate the genset size you need for your home, business or factory – then talk to us for a free recommendation.
Enter your loads to estimate the generator size
Home appliances
Enter how many of each appliance you want to run on the genset at the same time. Typical wattages are pre-filled; change them if you know the exact rating.
Shops, offices, hospitals & hotels
Pick your typical loads, and/or enter a known connected load in kW.
Diversity factor = share of the total load that runs at the same time (e.g. 70%).
Industrial motors & loads
Add each motor (size, quantity and starting method), plus any other load in kW.
Starting surge used: DOL ≈ 6×, star-delta ≈ 3×, soft starter ≈ 2.5×, VFD ≈ 1.5× running load (largest motor starting while the rest run).
Brand availability based on ranges published by the manufacturers and their partners; Brand names and trademarks belong to their respective owners; ranges as published by the manufacturers – contact us for availability.