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.
🔥 Top Trending Engineering Tools (TOP 10)
High-frequency calculations & verified design standardsCopper 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.
Power Supply and Electrical
Three-phase power, cable gauge sizing, transformer calculations, and power supply design tools.
3-Phase Power Calculator
Active, reactive, apparent power and power factor.
Cable Cross Section Calculator
Cable wire gauge & voltage drop double check.
Motor Power & Current Calculator
Single/3-phase motor FLA, breaker & cable sizing.
Transformer Turns Ratio Calculator
Turns ratio, secondary voltage/current & core area.
Fuse Selection Calculator
Fuse rating with inrush surge & temp derating.
PCB Signal and Safety
Focus on spacing, voltage drop, skin depth, and impedance when reviewing high-voltage and high-speed PCB layouts.
PCB Via Current & Array Calculator
IPC-2152 via ampacity, DC resistance & array sizing.
PCB Power Loop Inductance Calculator
Quantify stray inductance & vertical magnetic flux cancellation.
CPWG RF Impedance Calculator
50Ω/75Ω Grounded Coplanar Waveguide antenna trace.
RF Attenuator Calculator (Pi/Tee)
Pi/Tee/Bridged-T 50Ω attenuator & E96 resistor match.
PCB Spacing Calculator
Estimate clearance from IPC-2221 and IPC-9592 guidance.
Electronics & Circuit Design
Precision resistor calculators, filters, MCU timers, and analog circuit design utilities.
TL431 / AMS1117 Resistor Calculator
Precision divider & E96/E24 auto resistor search.
SiC / MOSFET Snubber & Spike Calculator
Turn-off spike prediction, IPC-9592B derating & RCD clamp.
Capacitive Power Supply Calculator
Transformerless RC dropper C, Xc & resistor power.
NTC Thermistor Temperature Calculator
B-value & Steinhart-Hart equation with MCU ADC.
LED Resistor Calculator
Series LED resistor, E24 match & power rating.
General Electrical Tools
Quick utilities for unit conversion, rated current estimation, resistor decoding, and other supporting calculations.
Mechanical Design
Springs, cylinders, gears, sheet metal bending, timing belts, and interference fits — everyday mechanical design calculations.
Sheet Metal Bending Calculator
K-factor, Bend Deduction BD, BA & flat blank length.
Pulley Speed & Ratio Calculator
Driver/driven pulley ratio, RPM & belt speed.
Thread Tap Drill Calculator
Metric cut & form tap drill size & depth.
CNC Cutting Speed & Feed Calculator
Spindle RPM, cutting speed Vc & feed Vf.
Gear Module & Center Distance
Spur & helical gear pitch dia & center distance.
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.
Get Free Samples & Technical Support
Dongguan/Shenzhen Manufacturing Base: SMT copper bars, PCB terminals, and custom hardware.
