Design guideline — not a CEC rule

Pot Light Spacing Calculator

Get a suggested layout grid and fixture count for even, general-purpose lighting, plus a wattage check against your planned circuit.

1. Room Details

Room Length (ft)

Room Width (ft)

Ceiling Height (ft)

Fixture Wattage (W each)

2. Suggested Layout

Ceiling height ÷ 2 rule

SUGGESTED SPACING

— ft

ESTIMATED FIXTURE COUNT

—

Total wattage: Enter fixture wattage to check total load.

Live Layout Preview

How this estimate is built

Spacing: ceiling height ÷ 2 is a common starting rule of thumb for general/ambient lighting.
Fixture count: room length and width divided by the suggested spacing, rounded to a grid.
Task areas (counters, desks) usually need tighter spacing positioned directly over the work surface — this tool only estimates general ambient lighting.
Check the total wattage against your Load Calculator or Breaker Size Calculator before wiring the circuit.

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