Recessed Lighting Calculator

Plan can light placement like a pro. Enter your room and desired brightness, and get the number of fixtures, recommended spacing, and a simple row layout.

ft
ft
ft
lm
Typical 6" can = 650-800 lm.

💡 Brightness math

Converts foot-candles to a total lumen target, then divides by fixture output.

✨ Even grid

Lays fixtures out in rows and columns so light pools don’t overlap.

🔖 Wall rule

Walls sit at half the light-to-light spacing to avoid dark corners.

🔒 Private

All calculations run locally in your browser.

More lighting tools

Brighten the right way.

Lumens to Watts → Can Light Watts to Lumens

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