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

Wire Size Calculator

Find the correct wire gauge for any electrical circuit based on current load, run length, and allowable voltage drop. Use this when wiring outlets, appliances, or sub-panels to avoid overheating and energy loss.

Load Current (amps)

One-Way Distance (feet)

System Voltage

Max Voltage Drop

Fill in the required fields to see your result.

Electrical Home

UPS Runtime Calculator

Estimate how many minutes a UPS (uninterruptible power supply) will keep your equipment running on battery backup, based on battery capacity, connected load, and UPS efficiency. Use it when sizing a UPS for a server, computer workstation, or network equipment.

Connected Load (watts)

Battery Capacity

Power Factor

UPS Efficiency

Fill in the required fields to see your result.

Key differences

	Wire Size Calculator	UPS Runtime Calculator
Category	Electrical Home	Electrical Home
Inputs required	4	4
Result	Minimum Wire Size (AWG)	Runtime (minutes)
What it does	Find the correct wire gauge for any electrical circuit based on current load, run length, and allowable voltage drop. Use this when wiring outlets, appliances, or sub-panels to avoid overheating and energy loss.	Estimate how many minutes a UPS (uninterruptible power supply) will keep your equipment running on battery backup, based on battery capacity, connected load, and UPS efficiency. Use it when sizing a UPS for a server, computer workstation, or network equipment.