Free homeowner tools
Put your own numbers to work.
No account. No hidden assumptions. Replace every sample with the specifications and rates that apply to your equipment.
Electricity
Appliance Cost
Calculate daily, monthly, and annual electricity cost.
Calculate → Backup powerGenerator Sizing
Add running loads and the largest motor surge.
Calculate → Fuel planningGenerator Fuel Cost
Estimate fuel needed, cost, and tank endurance.
Calculate → CoolingHVAC Running Cost
Estimate monthly and seasonal operating cost.
Calculate → Hot waterWater Heater Comparison
Compare three common energy options and payback.
Calculate → HeatingSpace Heater vs Central
See which approach costs less with your runtime.
Calculate → PoolPool Pump Savings
Compare single-speed and variable-speed operation.
Calculate →