U.S. electricity cost tools
Turn watts into dollars.
Calculate what appliances, gaming PCs, home systems, and EVs cost to run using the latest available residential electricity rate for your state, or enter the exact rate from your utility bill.
Electricity cost calculator
What does it cost to run?
Uses the selected state's latest EIA residential average unless you enter your own utility rate. Taxes, fixed charges, tiers and time-of-use pricing are not included.
Explore by question
Choose the electricity-cost tool that matches what you know
Popular calculations
Start with a common appliance
Gaming PC power
GPU electricity cost calculators
Side-by-side
GPU electricity cost comparisons
Heating & cooling
HVAC electricity cost models
Electric vehicles
EV charging cost calculators
Home systems
Water heating & pool-pump calculators
What PowerCostAtlas does
PowerCostAtlas combines transparent energy-cost formulas with state-level residential electricity prices from the U.S. Energy Information Administration. Instead of asking you to hunt down a rate before you can calculate anything, the tools start with a current state average and let you overwrite it with the number on your own bill.
For GPU calculators, official NVIDIA or AMD graphics-power specifications are kept separate from adjustable whole-PC assumptions. HVAC calculators use transparent input-power, CEER/EER2, or COP models with adjustable cycling and runtime. Water-heating tools model a daily thermal load from gallons and temperature rise, while pool-pump tools price editable operating schedules. State averages are benchmarks, not utility quotes. Each state page also tracks up to 24 months of EIA residential-rate history so recent changes are visible alongside the calculator. Fixed fees, taxes, usage tiers, seasonal pricing, demand charges and time-of-use rates can make a household's actual bill different. See the methodology and data sources.