✦ 158 Free Tools
Professional lighting
calculators & design tools.
Plan layouts, size fixtures, compare color temperatures, calculate lumen requirements, and design better lighting — for any room or project.
158+Tools
12Categories
100%Free
Most used
Popular calculators
The calculators people reach for first — sized, spaced, and spec-ready.
Core
Room lumens calculator
Total lumens needed for any room size and use.
Layout
Recessed lighting layout
Fixture count and spacing for even downlight coverage.
Color
Color temperature guide
Compare Kelvin, from warm 2700K to cool daylight.
Photometric
Beam angle calculator
Match beam spread to mounting height and target.
Electrical
Dimmer load calculator
Check dimmer compatibility and maximum wattage.
Electrical
Voltage drop calculator
Size LED runs and avoid dimming over long distances.
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Core tools 9 tools
Lumen, wattage, and brightness basics for any room.
Residential 24 tools
Bedroom, kitchen, living room, stair, and cove planners.
Recessed & layout 11 tools
Downlight counts, spacing, and coverage for any ceiling.
LED & electrical 30 tools
Driver sizing, voltage drop, dimmer load, and power planning.
Architectural & commercial 21 tools
Office, retail, warehouse, and hospitality lighting design.
Color & visual 15 tools
Color temperature, CRI, and Kelvin selection guides.
Professional & photometric 8 tools
Beam angle, throw distance, UGR, and spec-grade tools.
Home & decorative 9 tools
Chandelier, pendant, and vanity sizing for finishing touches.
Converters 7 tools
Lux to foot-candles, watts to lumens, and unit math.
Grow lighting 5 tools
PPFD, DLI, and horticultural lighting calculators.
Outdoor 6 tools
Street, parking lot, and landscape lighting layouts.
Advanced 13 tools
Circadian, L70 lifetime, and LED bin-matching tools.
All tools, zero cost
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