PCB Design Calculators
Complete Engineering Toolkit
PCB design estimates and reference guides. Differential and embedded microstrip calculations and numeric clearance/creepage results are temporarily unavailable.
Current & Power
Trace Width Calculator
Calculate minimum trace width for your current requirements based on IPC-2221
Current Capacity Calculator
Determine maximum current a trace can safely carry
Via Current Calculator
Calculate current capacity of single vias and via arrays
Impedance & Signals
Impedance Calculator
Estimate single-ended Z0 for isolated microstrip and stripline traces. Confirm the stackup and model limits with your fabricator.
Differential impedance reference (numeric results unavailable)
Reference for differential pair impedance targets and routing rules. Numeric differential calculation is temporarily unavailable while the model is validated; single-ended Z0 is available.
Pads & Vias
Safety & Standards
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Reference Standards
Why Use Our Calculators?
Documented Models
Trace width and via current use the IPC-2221 empirical power law; impedance uses published single-ended approximations. Results are estimates, with the assumptions shown on each page.
Instant Results
Real-time calculations as you type. No page reloads or waiting for results
100% Free
No registration, no limits, no ads. Use all calculators freely for your projects
Definitions and References
A wire harness is an organized bundle of wires, terminals, and protective coverings used to route power and signals through equipment. Cable assembly refers to prepared and terminated cables used for a specific interconnect purpose, and those definitions matter because PCB calculators often sit upstream of real connector and harness decisions.
Frequently Asked Questions
Which calculator should I open first?
Start with the trace width calculator when current and copper heating are the main constraint, then move to impedance, creepage, or via tools as the layout problem becomes more specific.
Are these calculators based on recognized standards?
The trace-width tool implements an IPC-2221 power-law estimate. Numeric clearance/creepage, differential impedance and embedded microstrip results are unavailable pending validation.
Can one calculator replace a full stackup review?
No. The tools accelerate estimation, but controlled impedance and manufacturing decisions still need your actual laminate, copper, and fabricator limits.
Why are wire harness and cable assembly definitions relevant here?
Many boards connect into larger electromechanical products, so PCB routing decisions often influence connector, cable assembly, and harness choices.
Do the tools support both current and signal-integrity problems?
The toolkit includes current capacity, isolated-line impedance and panelization estimates. Clearance/creepage is a design-condition checklist; differential calculation is unavailable.
Start Designing
Begin with our most popular tool - the PCB Trace Width Calculator.
Open Trace Width Calculator