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

Wire Gauge Calculator

Determines the minimum copper wire gauge (AWG) needed to limit voltage drop in an electrical run. Ideal for electricians, solar installers, and DIYers sizing cables for long runs.

Current Load (A)

Wire Length (ft)

Voltage Drop (%)

Electrical

Wire Ampacity Calculator

Find the safe current-carrying capacity of a copper or aluminum wire based on AWG size, ambient temperature, and number of bundled conductors. Essential for NEC-compliant circuit design.

Wire Size (AWG)

Ambient Temperature (°C)

Number of Conductors

Key differences

	Wire Gauge Calculator	Wire Ampacity Calculator
Category	Electrical	Electrical
Inputs required	3	3
Result	Required Wire Gauge (AWG)	Wire Ampacity (A)
What it does	Determines the minimum copper wire gauge (AWG) needed to limit voltage drop in an electrical run. Ideal for electricians, solar installers, and DIYers sizing cables for long runs.	Find the safe current-carrying capacity of a copper or aluminum wire based on AWG size, ambient temperature, and number of bundled conductors. Essential for NEC-compliant circuit design.