PCB Design Tools & Calculators
Free, browser-based calculators for trace width, impedance, via current, differential pairs, and more — built for working engineers.
PCB Design Calculators
Validated engineering calculators you can use directly in your browser. No sign-up required.
Trace Width Calculator
IPC-2152 based trace width for a given current
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Impedance Calculator
Microstrip and stripline characteristic impedance
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Via Current Calculator
Maximum current capacity of a plated through-hole via
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Differential Pair Calculator
Differential, odd-mode, and even-mode impedance
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Ohm’s Law / Power Calculator
Enter any two values to calculate the rest
Fill in exactly 2 fields and leave the others blank.
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Unit Converter
Convert between common PCB design units
Length / Distance
Copper Weight / Thickness
Temperature
Wavelength Calculator
Signal wavelength in PCB medium based on Er
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Crosstalk Estimator
Coupled noise between adjacent PCB traces
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PDN Target Impedance
Power Distribution Network impedance target
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Reactance Calculator (XC / XL)
Capacitive and inductive reactance at frequency
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Thermal / Junction Temperature
IC junction temperature from thermal resistance
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Fusing Current Calculator
Onderdonk’s equation — current to melt a conductor
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Conductor Spacing (IPC-2221)
Minimum clearance between conductors by voltage
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Bandwidth & Max Trace Length
Signal bandwidth and critical trace length from rise time
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