Lighting Calculators
Fast, practical tools for planning. Use them as a first approximation — then verify performance with IES-based photometry when accuracy matters.
Free tools
Metric + Imperial
Fast results
Stetra Photometric Studio
PhotometricsAnalyze IES photometry, polar distribution, BUG rating, and beam spacing in one tool
Recessed Lighting
Most usedSpacing, wall offsets, and a clean ceiling grid preview with a rough lux/foot-candle estimate.
Lumen Calculator
Lux / fcEstimate lumens needed based on room size, mounting height, and target illuminance.
Cable Size Calculator
Voltage dropQuick cable sizing checks to keep end voltage in a safe range for low-voltage lighting runs.
Lighting Scallops
Wall washScallop spacing visuals to help choose offsets and beam angles for wall washing.
Chandelier Size
SizingChandelier diameter guidance based on room dimensions with unit switching.