PCB Trace Width Calculator

• PCB trace width calculator based on the IPC-2221 standard
• Quickly calculate the minimum trace width and cross-section area from current, temperature rise, copper thickness (preset or custom) and trace location (external/internal), plus resistance, voltage drop and power loss estimates — results update instantly as you edit, no button needed

1. Open the tool page — no installation needed
2. In the parameters panel, enter the current and allowed temperature rise, then choose the copper weight (or a custom thickness), trace location (external/internal), ambient temperature, trace length and copper resistivity
3. Results are calculated in real time — there is no Calculate button. Review the minimum trace width (mm/mil), cross-section area, resistance, voltage drop and power loss; use the copy icon on a row for a single value or "Copy all" for everything, and "Reset" to restore the defaults

• This tool is completely free and requires no sign-up
• Everything runs locally in your browser — your data never leaves your device

Free online PCB trace width calculator based on the IPC-2221 standard. Quickly calculate the minimum trace width from current, temperature rise, copper thickness and trace location, plus resistance, voltage drop and power loss estimates.

Open the tool page — no installation needed In the parameters panel, enter the current and allowed temperature rise, then choose the copper weight (or a custom thickness), trace location (external/internal), ambient temperature, trace length and copper resistivity Results are calculated in real time — there is no Calculate button. Review the minimum trace width (mm/mil), cross-section area, resistance, voltage drop and power loss; use the copy icon on a row for a single value or "Copy all" for everything, and "Reset" to restore the defaults

This tool is completely free and requires no sign-up Everything runs locally in your browser — your data never leaves your device

Yes, PCB Trace Width Calculator is completely free. No download or installation required — it runs right in your browser.