Free website calculator example; not a report from the pre-release application.
Inputs
| Input and unit | Value |
|---|---|
| Trace length (mm) | 100 |
| Trace width (mm) | 1 |
| Copper thickness (µm) | 35 |
| Current (A) | 1 |
| Copper temperature (°C) | 20 |
Equation
Result
DC resistance49.257143mΩ
Voltage drop49.257143mV
Power loss49.257143mW
Current density28.571429A/mm²
Calculation record
Copper cross-sectional area
Total effective area = 0.035 mm².
Copper resistivity = 1.724 × 10^(-8) × [1 + 0.00393 × (T − 20)] Ω·m.
DC loss calculation
Independent worked example
A 100 mm × 1 mm × 35 µm trace at 20 °C has area 0.035 mm² and resistance approximately 49.26 mΩ. At 1 A, voltage drop is 49.26 mV and loss is 49.26 mW.
Assumptions & limitations
Uniform copper with ρ₂₀ = 1.724 × 10⁻⁸ Ω·m and α = 0.00393/°C. The model accepts −100 to 300 °C; check whether the linear approximation is suitable at your temperature. Excludes self-heating, skin effect, pads, neck-downs, and manufacturing variation. Not an ampacity rating.
Calculation provenance: Extracted from PCBA Workbench v1.2.0; independent SI-unit reference tests.
This record uses the same free calculation engine as the interactive tool. Example results support independent review; they do not certify a design or validate the full TraceFlow application.