Wire Size Calculator

How to Use the Wire Size Calculator

This calculator helps you determine the minimum wire size needed for a circuit or calculate wire properties based on its gauge.

Calculation Steps

1. Choose the Calculation Type (Minimum Wire Size or Wire Properties)
2. For Minimum Wire Size:
   • Enter the Current (A)
   • Enter the Voltage (V)
   • Enter the Wire Length (ft)
3. For Wire Properties:
   • Enter the Wire Gauge (AWG)
4. Click the "Calculate" button
5. The calculator will display the results based on your inputs

Factors Affecting Wire Size

• Current: Higher current requires larger wire size
• Voltage: Affects voltage drop calculations
• Wire Length: Longer wires may require larger sizes to minimize voltage drop
• Material: Copper and aluminum have different conductivities
• Insulation: Different types affect ampacity ratings
• Temperature: Ambient temperature affects current-carrying capacity

Example Calculation

Let's walk through an example calculation:

Scenario: Minimum Wire Size

• Current: 20 A
• Voltage: 120 V
• Wire Length: 50 ft

Result: The calculator will determine the minimum wire size needed for this circuit.

Scenario: Wire Properties

• Wire Gauge: 12 AWG

Result: The calculator will display the diameter, cross-sectional area, and resistance per 1000 ft for 12 AWG wire.

Note: Always consult local electrical codes and consider specific application conditions when selecting wire sizes for actual installations.