Holiday Light Calculator

String count and wattage from house dimensions and style.

Linear Feet to Cover

Bulbs per String

String Length (ft)

LED? (0=Incandescent, 1=LED)

Hours per Day

Electric Rate ($/kWh)

Season Length (days)

Tab to move between fields

Strings Needed

Total Wattage (W)

Total Bulbs400

Total Amps0.23

kWh per Day0.17

Monthly Cost ($)$0.66

Season Cost ($)$0.98

Circuits Needed1

Max Strings/Circuit205

How to Use This Calculator

Enter the total linear feet of roofline, trees, or pathways you want to cover.
Input the number of bulbs per string, the lit length of each string in feet, and select LED or incandescent.
Set daily run time in hours, electricity rate per kWh, and the season length in days.
Review strings needed, total wattage, and both monthly and season electricity costs.
Check the circuits needed output to avoid overloading your electrical panel.

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