Battery Backup CalculatorEstimate battery runtime hours for a backup or off-grid load. Load (W) Battery capacity (Ah) Battery voltage System efficiency % […]Circuit Load CalculatorVerify the load on a breaker is within the 80 percent continuous-use limit. Total load (W) Voltage Breaker rating (A) […]Conduit Fill CalculatorCheck whether the wires you plan to run fit within the code fill limit for a conduit. Conduit size1/2 in […]Dimmer Load CalculatorVerify dimmer compatibility by comparing the total fixture load against the dimmer rated capacity. Number of fixtures Watts per fixture […]EV Charger Circuit CalculatorRecommend the breaker and circuit size for an EV charger continuous load. Charger amps Voltage CalculateReset Breaker Size — amp […]Generator Size CalculatorEstimate the generator size needed to run multiple loads, accounting for motor startup surge. Essential load (W) Medium load (W) […]LED Strip Length CalculatorCalculate an LED strip total LED count, wattage, and the power supply size you need. Strip length (ft) LED density30 […]Lighting Layout CalculatorCalculate how many fixtures or bulbs are needed to hit a target light level (foot-candles) in a room. Room area […]Outlet Spacing CalculatorCalculate the number of receptacles needed along a wall to meet code spacing requirements. Wall length (ft) Code spacingResidential: every […]Panel Load CalculatorCheck current panel capacity utilization to see if you have room for new circuits. Total connected amps Panel main rating100A […]Recessed Light Spacing CalculatorCalculate recessed-light spacing based on ceiling height and fixture diameter. Ceiling height (ft) Light diameter (in) CalculateReset Light Spacing — […]Solar Panel CalculatorEstimate solar panel system size based on monthly usage, sun hours, and system efficiency. Monthly usage (kWh) Peak sun hours/day […]Wire Gauge CalculatorRecommend a copper wire gauge (AWG) based on amperage, one-way run length, and acceptable voltage drop. Amps One-way length (ft) […]