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Both calculators run independently — change the inputs on either side to compare results.

Solar Panel Roof Area Calculator

Estimates how many solar panels fit on a roof section and calculates expected power output, accounting for usable area, tilt, and shading. Ideal for homeowners planning a solar installation.

Roof Length (ft)

Roof Width (ft)

Roof Tilt

Shading Factor

Panel Wattage

Fill in the required fields to see your result.

Solar Energy

Solar Panel Tilt Angle Calculator

Find the ideal mounting angle for your solar panels based on your geographic latitude and the season you want to optimize. Use this when planning a fixed-tilt roof or ground-mount installation to maximize annual energy yield.

Latitude (degrees)

Optimization Period

Existing Roof Pitch (degrees)

Fill in the required fields to see your result.

Key differences

	Solar Panel Roof Area Calculator	Solar Panel Tilt Angle Calculator
Category	Solar Energy	Solar Energy
Inputs required	5	3
Result	Estimated System Capacity (W)	Optimal Tilt Angle (degrees)
What it does	Estimates how many solar panels fit on a roof section and calculates expected power output, accounting for usable area, tilt, and shading. Ideal for homeowners planning a solar installation.	Find the ideal mounting angle for your solar panels based on your geographic latitude and the season you want to optimize. Use this when planning a fixed-tilt roof or ground-mount installation to maximize annual energy yield.