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

LED Conversion Savings Calculator

Calculate the annual electricity cost savings and CO₂ reduction you'll achieve by swapping incandescent or CFL bulbs for LEDs. Use it to justify the upfront cost of an LED retrofit.

Current Bulb Wattage (watts)

Number of Bulbs (bulbs)

Daily Usage Hours (hours)

Electricity Rate ($/kWh)

LED Efficiency Ratio

Fill in the required fields to see your result.

Key differences

	Battery Backup Runtime Calculator	LED Conversion Savings Calculator
Category	Electrical Home	Electrical Home
Inputs required	5	5
Result	Backup Runtime (hours)	Annual Savings ($)
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 the annual electricity cost savings and CO₂ reduction you'll achieve by swapping incandescent or CFL bulbs for LEDs. Use it to justify the upfront cost of an LED retrofit.