electrical home Calculators
Last updated: May 2026
Electrical Power Consumption Calculator
Estimate how much electricity a device consumes and what it costs per month.
Wire Gauge Calculator
Find the minimum safe AWG wire gauge for an electrical circuit based on current load, wire run length, and system voltage.
Circuit Breaker Size Calculator
Determine the correctly rated circuit breaker amperage for any electrical circuit based on total wattage and voltage.
Voltage Drop Calculator
Calculate the voltage drop across an electrical wire given the current, one-way run distance, and AWG wire gauge.
Electrical Load Calculator
Add up the total electrical load across lighting, outlets, and appliances in a home circuit or panel.
Conduit Fill Calculator
Determine how many wires of a given AWG gauge fit safely inside an electrical conduit.
LED Savings Calculator
Find out exactly how much money you save each year by replacing incandescent or CFL bulbs with LEDs.
Electrical Panel Load Calculator
Estimate the minimum service amperage your home's electrical panel needs based on lighting, kitchen appliances, and HVAC loads.
Home Generator Size Calculator
Find the minimum wattage generator needed to power your essential home appliances during an outage.
Electrical Box Fill Calculator
Calculate how many additional wires fit in an electrical junction box after accounting for installed devices.
Wire Size Calculator
Find the correct wire gauge for any electrical circuit based on current load, run length, and allowable voltage drop.
Electricity Cost Calculator
Estimate how much any appliance costs to run daily, monthly, or annually based on its wattage, hours of use, and your utility rate.
Circuit Breaker Sizing Calculator
Determine the correct circuit breaker amperage for any electrical circuit using NEC load classification rules.
Home Solar Panel Calculator
Calculate how many solar panels you need to cover your home's electricity usage based on your location's sun hours, panel wattage, and system efficiency.
Generator Sizing Calculator
Calculate the minimum generator wattage needed to power your home's essential loads, motors, and well pump during an outage.
Electric Heat Load Calculator
Estimate the electric heating power (in watts) needed to keep a room comfortable in winter.
Electrical Panel Upgrade Calculator
Find out what amperage panel you need after adding new circuits, EV chargers, or major appliances.
Appliance Energy Cost Calculator
Calculate exactly how much an appliance costs to run per month and per year based on its wattage, usage schedule, and your local electricity rate.
Circuit Breaker Size Calculator
Determine the correctly sized circuit breaker for any electrical load, accounting for continuous versus non-continuous use, ambient temperature, and safety margins.
LED Conversion Savings Calculator
Calculate the annual electricity cost savings and CO₂ reduction you'll achieve by swapping incandescent or CFL bulbs for LEDs.
Home Generator Size Calculator
Determine the right generator size (in kilowatts) to keep your home's essential appliances running during a power outage.
Electrical Outlet Circuit Calculator
Find out how many electrical outlets can safely share a single circuit, given the breaker size and any dedicated loads already on it.
Electricity Cost Calculator
Calculate how much an appliance or device costs to run per day, month, and year based on its power rating and your electricity rate.
Electrical Panel Load Calculator
Calculate your home's total electrical panel load and remaining capacity in volt-amperes, so you know whether your panel can support new appliances, an EV charger, or a home addition.
UPS Runtime Calculator
Estimate how many minutes a UPS (uninterruptible power supply) will keep your equipment running on battery backup, based on battery capacity, connected load, and UPS efficiency.
Ohm's Law Calculator
Solve for voltage, current, resistance, or power in any DC circuit using Ohm's Law.
Battery Backup Runtime Calculator
Estimate how many hours a battery backup system will run your devices during a power outage.
LED Replacement Calculator
Find out how much money you save annually by switching from incandescent or CFL bulbs to LED lighting.
Electrical Panel Capacity Calculator
Determine whether your electrical panel has enough remaining capacity before adding new circuits or appliances.