Engineering calculators for day-to-day PCB design work
The English site focuses on practical design checks: copper bar current capacity, PCB spacing, voltage drop, impedance, skin depth, and supporting utility tools.
Fast estimates, reference values, and practical guardrails before deeper simulation or lab validation.
Start with a calculator, then review the matching topic hub to understand assumptions and common tradeoffs.
Copper Bar and Ampacity
Use these tools for copper bar sizing, ampacity checks, resistance, and material planning during high-current design.
Copper Bar Current Capacity
Thermal-balance ampacity and loss estimation.
Copper Bar Resistance
Resistance, power loss, and voltage drop for copper bars.
Copper Bar Price Calculator
Estimate cost before quotation and procurement.
Metal Weight Calculator
Convert dimensions into copper, brass, or aluminum weight.
PCB Signal and Safety
Focus on spacing, voltage drop, skin depth, and impedance when reviewing high-voltage and high-speed PCB layouts.
PCB Spacing Calculator
Estimate clearance from IPC-2221 and IPC-9592 guidance.
Trace Voltage Drop
Estimate resistance, drop, power loss, and temperature rise.
Skin Depth Calculator
Understand frequency-dependent conductor loss.
PCB Impedance Calculator
Microstrip and stripline impedance calculations.
General Electrical Tools
Quick utilities for unit conversion, rated current estimation, resistor decoding, and other supporting calculations.
Mechanical Design
Springs, cylinders, gears, chains, timing belts, and interference fits — everyday mechanical design calculations.
Compression Spring Calculator
Stiffness, load, and stress verification for compression springs.
Cylinder Force Calculator
Push/pull force and safety factors for pneumatic cylinders.
Gear Parameter Calculator
Spur gear dimensions from module and tooth count.
Chain Length Calculator
Roller chain link count and total length.
Timing Belt Calculator
Belt pitch length and pulley diameter estimation.
Interference Fit Calculator
Min/max interference for shaft-hub connections.
Servo Motor Calculator
Torque, power, and inertia ratio for motor selection.
Ball Screw Calculator
Inertia, torque, and speed for ball screw sizing.
Strength Calculator
Normal, shear, impact, and bending stress checks.
Cam Indexer Calculator
Inertia and torque for rotary cam indexer selection.
Vacuum Cup Calculator
Suction force and cup count for pick-and-place.
Reference Hub
Browse the English reference hub to jump between key tools by topic.
Contact
Use the contact page for technical questions, copper bar projects, and support requests.
Chinese Main Site
Need the full Chinese engineering content set? Switch to the Chinese homepage for the broader content hub.