Solar Panel Angle Calculator

Find the optimal tilt angle for solar panels by latitude and season. Provides summer, winter, and year-round fixed angles with azimuth guidance. Runs locally in your browser.

Latitude (°)

positive = north

Longitude (°)

positive = east

Enter your latitude to calculate optimal panel angles.

Year-round fixed tilt ≈ latitude. Summer tilt ≈ latitude × 0.9 − 24°. Winter tilt ≈ latitude × 0.9 + 29°. Azimuth = 180° (south) in the northern hemisphere, 0° (north) in the southern. Runs locally — nothing leaves your browser.