Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Electrical
Wire Size Calculator
Find the minimum wire cross-sectional area in circular mils needed to keep voltage drop within code limits for any DC or single-phase AC circuit. Use this when wiring long runs to panels, subpanels, motors, or outdoor equipment.
Fill in the required fields to see your result.
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.
Fill in the required fields to see your result.
Key differences
| Wire Size Calculator | Wire Ampacity Calculator | |
|---|---|---|
| Category | Electrical | Electrical |
| Inputs required | 4 | 3 |
| Result | Required Wire Size (AWG) | Wire Ampacity (A) |
| What it does | Find the minimum wire cross-sectional area in circular mils needed to keep voltage drop within code limits for any DC or single-phase AC circuit. Use this when wiring long runs to panels, subpanels, motors, or outdoor equipment. | 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. |