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

Wire Gauge & Ampacity Calculator

Determine the minimum wire cross-sectional area (in mm²) needed to safely carry a given current over a set distance without exceeding your allowed voltage drop. Essential for wiring solar systems, EV chargers, and long cable runs.

Current Load (A)

Wire Run Distance (ft)

System Voltage

Max Voltage Drop

Wire Material

Fill in the required fields to see your result.

Electrical

Short Circuit Current Calculator

Compute the available short-circuit current (ASCC) at a fault point downstream of a transformer, accounting for transformer impedance and cable impedance to the fault location. Use this to verify that breakers and fuses have a sufficient interrupting rating.

Transformer Size (kVA)

Transformer Impedance (%)

System Voltage

Cable Length to Fault (ft)

Cable Size (AWG/kcmil)

Fill in the required fields to see your result.

Key differences

	Wire Gauge & Ampacity Calculator	Short Circuit Current Calculator
Category	Electrical	Electrical
Inputs required	5	5
Result	Minimum Wire Cross-Section (mm²)	Short Circuit Current (A)
What it does	Determine the minimum wire cross-sectional area (in mm²) needed to safely carry a given current over a set distance without exceeding your allowed voltage drop. Essential for wiring solar systems, EV chargers, and long cable runs.	Compute the available short-circuit current (ASCC) at a fault point downstream of a transformer, accounting for transformer impedance and cable impedance to the fault location. Use this to verify that breakers and fuses have a sufficient interrupting rating.