Lighting Layout Calculator

Calculate the number of light fixtures, total lumens and wattage needed for any room based on IS 3646 / IESNA illumination standards. Perfect for architects, interior designers and electricians.

Room & Fixture Details

Select room type, enter dimensions and pick your fixture.

Room Type

Length (ft)

Width (ft)

Height (ft)

Fixture Type

Wattage per Fixture (W)

Maintenance Factor

Enter room dimensions and select a fixture to see results.

Fill in the details on the left to get started

Calculations use the lumen method (E = Φ / A × MF). Actual results depend on wall colour, reflectance and fixture beam angle. Always verify with a professional lighting designer.