Engineering Tools
Free PCB Calculators & Engineering Tools
Practical calculators for controlled impedance, trace ampacity, and stackup design — the numbers we use on the factory floor, free for every hardware engineer.
PCB Impedance Calculator
Microstrip, stripline, and coplanar-waveguide impedance from geometry and dielectric constant.
Differential Pair Calculator
Z_diff, Z_odd, Z_even and Z_common for edge-coupled microstrip and stripline pairs. USB, PCIe, DDR, HDMI targets.
PCB Trace Width Calculator
IPC-2221 ampacity: minimum trace width for a target current and temperature rise.
Via Current & Temperature Rise Calculator
IPC-2221 via ampacity: temperature rise for a given current, or max current per via. Parallel-via sizing.
Via Stub Length Calculator
Quarter-wave resonant frequency of via stubs. Check if back-drilling is needed for your data rate.
Via Impedance Calculator
Characteristic impedance, capacitance and inductance of a via using the coaxial approximation model.
Conductor Spacing Calculator
IPC-2221B Table 6-1: minimum clearance for a given voltage, or max voltage for a given spacing.
PCB Material Selector & Comparator
Filter, sort and compare 12+ laminates by Dk, Df, Tg, Td, CTE and moisture. Real datasheet specs.
PCB Stackup Calculator
Build a layer stackup and estimate thickness, impedance, and copper distribution.
Rogers RT/duroid 5880 Calculator
Microstrip, stripline, and CPW impedance for Rogers RT/duroid 5880 (Dk 2.20) RF boards.
Need a board built to these numbers?
Upload your Gerbers for an engineer-reviewed instant quote.