Size a generator for this load

Computed on typical values; ranges shown below. 25% headroom applied.

Recommended generator

3,500–4,500W portable generator

  • Running watts: 1,800W typical (range 800W–2,900W)
  • Peak (starting) requirement: 2,200W (starting range 1,100W–3,300W)
  • With 25% headroom: 2,750W minimum rating

Planning estimates from the sourced ranges below — check your appliance’s nameplate first. Surge model assumes staggered starts (largest motor last); see how we calculate.

Calculator by GeneratorMath →