Recessed Lighting Calculator
Calculate position and layout for recessed lights in your room
Runs in your browser
Room Dimensions
Lighting Specifications
Preview
- Horizontal spacing: 6.67 ft
- Vertical spacing: 7.50 ft
- Margin distance from wall (horizontal): 3.33 ft
- Margin distance from wall (vertical): 3.75 ft
What is a recessed lighting calculator?
A recessed lighting calculator is an online utility that helps you calculate the optimal position and layout for recessed lights in your space. This tool calculates the spacing between lights, distance from walls, and light coverage to ensure even and beautiful lighting in your room.
Use cases
- Design lighting systems for living rooms, bedrooms, or offices
- Calculate the number of lights needed for a space
- Determine light placement for even illumination
- Plan for renovation or new construction projects
When to use?
Use this tool when you're planning to install recessed lights, renovate your lighting system, or design a new space. Very useful for architects, interior designers, electricians, and homeowners who want a professional lighting system.
Examples
Plan a living room
Input
Room 20 × 15 ft, 6 lights
Output
A 2 × 3 grid: lights 6.7 ft apart along the length and 3.3 ft from the side walls, rows 7.5 ft apart and 3.8 ft from the end walls.
Questions and answers
How does the calculator space the lights?
It spreads them evenly: the gap between two lights is twice the gap between a light and the wall, so light falls evenly across the room.
What does the beam angle change?
It sets how wide each light's circle is on the floor. A wider angle covers more floor per light, and the ceiling height is used to calculate that width.
Can I use meters instead of feet?
Yes. Choose feet, meters, inches or centimeters, and every result uses the same unit.