PCB Design
Every pcb design calculator on CalcEngines — unit converters, derived indices and interpretive tools, each with its formula, a worked example and the reference intervals it is judged against.
8 calculators in this section
- Crosstalk CalculatorHow much of an edge on one trace appears on the one beside it: near-end and far-end crosstalk as a fraction and in decibels, the length beyond which near-end crosstalk stops growing, and the two rules that fall out of the algebra — that moving the plane closer beats moving the traces apart, and that far-end crosstalk cancels in a stripline and does not in a microstrip.
- Differential Pair Impedance CalculatorDifferential, odd-mode, even-mode and single-ended impedance of an edge-coupled pair — microstrip or stripline — from trace width, gap, dielectric height, copper weight and εᵣ, with the coupling coefficient and an honest account of how approximate the published fits are.
- Microstrip Impedance CalculatorCharacteristic impedance, effective permittivity, propagation delay and guided wavelength for a PCB microstrip from its width, dielectric height, copper weight and εᵣ — or the width you need for a target impedance, by bounded iteration.
- PCB Propagation Delay and Length Matching CalculatorHow long a signal takes to get down a trace, on an outer layer or an inner one: the delay per millimetre from the stack-up, the delay along the whole trace, the electrical length in degrees, the skew between two traces of different length, and the matching tolerance a skew budget leaves you — plus the length at which the trace starts behaving as a transmission line at all, which depends on the rise time and not on the clock.
- PCB Trace Resistance CalculatorThe resistance of a copper trace from its length, width, copper weight and temperature — with the voltage drop and power it costs at your current, the sheet resistance in milliohms per square that layout people actually think in, and the number of squares your trace is.
- PCB Trace Width CalculatorThe copper trace width a current needs for a chosen temperature rise, on an outer or inner layer, from the IPC-2221 curve fit — or the temperature rise of a width you already have — with the trace's resistance, voltage drop and power loss over its length.
- PCB Via Current CalculatorHow much current a plated via barrel can carry for a temperature rise you choose, from its finished hole diameter, plating thickness and the board's thickness — with the barrel's copper cross-section, its resistance and voltage drop, and, for a thermal via array, the thermal resistance the array actually gives.
- Stripline Impedance CalculatorCharacteristic impedance, propagation delay and guided wavelength for a buried PCB trace between two reference planes — symmetric or offset — from its width, the plane-to-plane dielectric thickness, copper weight and εᵣ, or the width you need for a target impedance, by bounded bisection.