Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Battery Backup Runtime Calculator

Estimate how many hours a battery backup system will run your devices during a power outage. Essential for sizing UPS systems, solar storage, and off-grid setups.

Battery Capacity (Ah)

Battery Voltage

Total Load (watts)

Inverter Efficiency

Depth of Discharge

Fill in the required fields to see your result.

Electrical Home

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. Ideal for comparing appliances or spotting energy hogs.

Appliance Wattage (watts)

Hours Used Per Day (hours)

Days Used Per Month (days)

Electricity Rate ($/kWh)

Appliance Efficiency

Fill in the required fields to see your result.

Key differences

	Battery Backup Runtime Calculator	Appliance Energy Cost Calculator
Category	Electrical Home	Electrical Home
Inputs required	5	5
Result	Backup Runtime (hours)	Monthly Energy Cost ($)
What it does	Estimate how many hours a battery backup system will run your devices during a power outage. Essential for sizing UPS systems, solar storage, and off-grid setups.	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. Ideal for comparing appliances or spotting energy hogs.