AstroPCB
PCB Engineering Tools
Free online calculators and viewers for PCB designers.
Free online tools for PCB designers and engineers. Calculate trace widths for current-carrying requirements, model impedance for controlled-impedance designs, plan layer stackups for multilayer constructions, and view Gerber files to verify design output before submitting for fabrication.
Trace Width Calculator
Calculate the minimum trace width for a given current, copper weight, acceptable temperature rise and trace location (external or internal layer). Based on IPC-2152 current-carrying capacity data. Enter your parameters and the calculator returns the recommended trace width with temperature rise estimate.
Impedance Calculator
Calculate characteristic impedance for microstrip, stripline and differential pair configurations. Enter dielectric thickness, dielectric constant, trace width, copper thickness and trace separation (for differential pairs). The calculator returns impedance values using closed-form equations — for production boards, AstroPCB uses a 2D field solver for greater accuracy.
Stackup Calculator
Plan multilayer PCB stackups with layer-by-layer specification of copper weight, dielectric material and thickness. Visualize the cross-section, check symmetry and estimate total board thickness. Export the stackup specification for inclusion in your fabrication documentation.
Gerber Viewer
Upload and view Gerber files (RS-274X), Excellon drill files and ODB++ data directly in the browser. Verify layer alignment, check drill positions, inspect trace routing and confirm pad geometry before submitting files for fabrication. No software installation required.
These tools provide engineering estimates for design planning. For production boards, the AstroPCB engineering team performs precise calculations using the actual material properties of the specified laminate lot.