📅 Added on: November 8, 2026
Recessed Light Calculator is a free browser tool for comparing first-pass ceiling layouts before a home renovation. Enter the width and length of a rectangular room, ceiling height, fixture lumens and beam angle. Adjust the target light level and see how the estimated number of downlights, spacing and wall offsets change on a two-dimensional plan. The calculator also shows the assumptions behind the estimate. Save the layout as a PNG or export fixture coordinates and inputs as CSV. No account is required. The estimates are for preliminary general lighting, not field measurements, an electrical design, or installation approval.
