Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
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.
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.
Key differences
| Wire Ampacity Calculator | Wire Size Calculator | |
|---|---|---|
| Category | Electrical | Electrical |
| Inputs required | 3 | 4 |
| Result | Wire Ampacity (A) | Required Wire Size (AWG) |
| What it does | 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. | 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. |