Space Heater Wattage Calculator

Determine the precise heating capacity (Watts) required to warm your space safely.

1. Room Dimensions

Length (ft)

Width (ft)

Ceiling (ft)

Heating Requirement

Supplemental Primary Heat

Insulation & Drafts

Good / Modern Average Drafty / Old

Required Heating Power

BTU Equivalent -- BTU

120V Circuit Draw -- Amps