Electrical & Engineering Calculators
Free online electrical calculators for wire gauge, solar panels, HVAC sizing, LED resistors, and more.
6 calculators available
Electrical Load Calculator
Calculate total electrical load and circuit breaker sizing.
HVAC Sizing Calculator
Calculate BTU and tonnage needed for heating and cooling.
LED Resistor Calculator
Calculate the correct resistor value for LED circuits.
Power Consumption Calculator
Calculate electricity cost from device wattage and usage hours.
Solar Panel Calculator
Estimate solar panel system size, kWh output, and savings.
Wire Gauge Calculator
Calculate wire gauge, resistance, and max ampacity for electrical wiring.