Category 04
Bills & home energy
Turn everyday usage into visible monthly and annual costs.
16 practical tools
All 16 calculators are available now with visible formulas and assumptions.
Appliance electricity cost
What does an appliance cost per use, month, and year?
Standby power cost
What do always-on devices cost over a year?
Heating system cost comparison
Which heating option costs less under your rates?
Heat pump savings and payback
When does a heat pump recover its installed cost?
Insulation payback
How long before savings repay the upgrade?
Solar panel payback
When do generation and bill savings cover installation?
Household water cost
What do household water habits cost each year?
Shower cost
What does one shower cost in water and energy?
Laundry cost per load
What does each wash and dry cycle cost?
Internet plan true cost
What is the real monthly cost after fees and promos?
Electricity bill estimate
What is the bill after usage charges, fixed fees, and tax?
Time-of-use energy cost
What does electricity cost across peak and off-peak periods?
Gas bill estimate
What is the estimated gas bill from usage and standing charges?
Light bulb replacement savings
How much can lower-wattage bulbs save over their lifetime?
Backup generator load & runtime
What generator capacity and fuel runtime cover the devices you plan to run?
Air-conditioner room sizing
What approximate cooling capacity does your room need?