Lighting Load Calculator
Estimate how much lighting a circuit may practically support based on breaker size, voltage, and fixture wattage.
Use this as a quick planning tool for lighting counts, available watts, and basic circuit headroom.
Tool status
Lighting Load Calculator results are temporarily unavailable
Calculation results for this tool are temporarily unavailable while its engineering assumptions and electrical guidance are being reviewed. The educational information on this page remains available.
Electrical work should be evaluated for the specific installation and applicable local requirements.
Related problems and reference
Planning and safety note
This content is for general learning and planning. Always verify work against current NEC requirements, manufacturer instructions, and local code rules. If you are unsure or see heat, sparks, burning smell, repeated trips, or damaged wiring, contact a licensed electrician.
For accurate readings and safe testing, having the right tools matters.See recommended tools →