Free PCB Tools
Free Online PCB Tools & Calculators
Essential PCB tools and calculators for engineers and designers. Use our free online PCB calculators to optimize your designs. From impedance calculator to trace width calculator, we provide the tools you need for successful PCB design.
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PCB Design Tools & Calculators
Our collection of free PCB tools helps you design better circuits. Each PCB calculator is built to industry standards for accurate results.
Trace Width Calculator
Calculate the required PCB trace width based on current carrying capacity using IPC-2221 standards.
- IPC-2221 Standard
- Internal/External Layers
- Temperature Rise
Microstrip Calculator
Calculate characteristic impedance for outer layer microstrip traces with accurate results.
- Impedance Calculation
- Propagation Delay
- Effective Dielectric
Stripline Calculator
Calculate impedance for inner layer stripline traces between two reference planes.
- Symmetric/Asymmetric
- Inner Layer Routing
- Better Shielding
Differential Pair Calculator
Calculate differential impedance for high-speed signal pairs like USB, HDMI, and PCIe.
- USB/HDMI/PCIe
- Coupling Factor
- Odd-Mode Impedance
Crosstalk Calculator
Estimate crosstalk between parallel traces and verify 3W rule compliance.
- NEXT/FEXT
- 3W Rule Check
- S/H Ratio
Wavelength Calculator
Convert frequency to wavelength for RF and high-speed PCB design.
- λ/4 & λ/10
- FR-4 & Rogers
- Multiple Units
Skin Depth Calculator
Calculate skin effect depth at high frequencies for RF design.
- Multiple Materials
- AC/DC Ratio
- RF Design
Voltage Drop Calculator
Calculate voltage drop across PCB traces for power distribution analysis.
- Power Loss
- Resistance
- % Drop Warning
Via Calculator
Calculate via current capacity and determine required number of vias.
- Current Capacity
- Via Count
- IPC Standard
Thermal Via Calculator
Design thermal via arrays for heat dissipation from power components.
- Via Array Size
- Thermal Resistance
- Power Dissipation
Decoupling Capacitor Calculator
Calculate optimal bypass capacitor values for IC power filtering.
- Ripple Control
- ESR Selection
- Capacitor Values
Annular Ring Calculator
Calculate and verify annular ring width for IPC compliance.
- IPC Classes
- Tolerance Analysis
- Pass/Fail Check
Drill Aspect Ratio Calculator
Check via/hole drill aspect ratio for manufacturability.
- Mechanical/Laser
- Aspect Limits
- Recommendations
PCB Thickness Calculator
Calculate total PCB stackup thickness with layer builder.
- Layer Stackup
- Prepreg/Core
- Visual Builder
Unit Converter
Convert between mil, mm, µm, oz, and temperature units.
- Length Units
- Copper Weight
- Temperature
AWG Calculator
Convert between AWG and metric wire sizes with properties.
- AWG ↔ Metric
- Current Rating
- Resistance
Resistor Color Code
Decode resistor values from color bands with visual selector.
- 4-Band Resistors
- Visual Display
- Color Reference
Capacitor Code Calculator
Decode ceramic capacitor markings (104, 473, etc.).
- 3-Digit Codes
- pF/nF/µF
- Tolerance Codes
Ohm's Law Calculator
Calculate voltage, current, resistance, and power relationships.
- V/I/R/P
- Auto Calculate
- All Formulas
LED Resistor Calculator
Calculate current limiting resistor for LED circuits.
- Series/Parallel
- Power Rating
- LED Colors
Inductor Code Calculator
Decode SMD inductor markings and convert values.
- R-Format
- 3-Digit Code
- nH/μH/mH
Signal Rise Time Calculator
Calculate critical length and transmission line requirements.
- Critical Length
- Knee Frequency
- TL Analysis
Return Loss Calculator
Calculate return loss, VSWR, and reflection coefficient.
- VSWR
- Reflection Coeff
- Match Analysis
Ground Bounce Calculator
Analyze SSO/SSN induced ground bounce in IC packages.
- SSO Analysis
- Ground Pins
- di/dt Calculation
Power Plane Calculator
Analyze power/ground plane resistance and voltage drop.
- Plane Resistance
- Voltage Drop
- Current Capacity
EMI Filter Calculator
Design LC filters for EMI suppression.
- Low/High Pass
- Pi/T Filter
- Component Values
BGA Fanout Calculator
Analyze BGA escape routing feasibility and layer requirements.
- Fanout Strategy
- Layer Count
- Via Technology
SMD Pad Calculator
Calculate IPC-7351 compliant land patterns for SMD components.
- IPC-7351
- Density Levels
- Courtyard
Solder Paste Calculator
Design stencil apertures and analyze paste release.
- Area Ratio
- Aspect Ratio
- IPC-7525
Panelization Calculator
Optimize PCB panel layout for manufacturing efficiency.
- Board Count
- Utilization
- V-Cut/Tab
PCB Cost Estimator
Estimate PCB manufacturing costs based on specifications.
- Layer/Size
- Surface Finish
- Volume Discount
Copper Weight Calculator
Convert between oz/ft² and μm copper thickness.
- oz ↔ μm
- Mass Calc
- Reference Table
Gerber Viewer
View and verify your Gerber files online before ordering.
- All Layer Types
- Zoom & Pan
- Multi-Layer View
Impedance Calculator
Comprehensive impedance calculator with multiple configurations.
- Microstrip & Stripline
- Differential Pairs
- Multiple Dielectrics
Eye Diagram Analyzer
Analyze signal quality using eye diagram parameters for high-speed links.
- Eye Height/Width
- Jitter Analysis
- BER Estimation
Insertion Loss Calculator
Calculate total transmission line loss including conductor and dielectric losses.
- Conductor Loss
- Dielectric Loss
- Surface Roughness
Coplanar Waveguide Calculator
Calculate impedance for CPW and GCPW transmission lines.
- CPW/GCPW
- Conformal Mapping
- Effective Dk
Edge Rate Calculator
Analyze signal edge rate and its impact on EMI and transmission line effects.
- Rise/Fall Time
- Knee Frequency
- Critical Length
Dielectric Constant Calculator
Look up and adjust dielectric constants for various PCB materials.
- Material Database
- Temperature Adj
- Frequency Adj
Impedance Matching Calculator
Design L, Pi, T, and quarter-wave impedance matching networks.
- L/Pi/T Networks
- Quarter Wave
- Component Values
Current Density Calculator
Calculate current density in traces, vias, and wires per IPC standards.
- Trace/Via/Wire
- IPC-2221
- Temperature Rise
Fusing Current Calculator
Calculate conductor fusing current using Onderdonk's equation.
- Onderdonk's Eq
- Time to Fuse
- Safety Margins
Power Dissipation Calculator
Calculate power dissipation and junction temperature for various components.
- IC/LDO/MOSFET
- Junction Temp
- Thermal Resistance
Heat Sink Calculator
Calculate required heat sink thermal resistance for component cooling.
- Required θsa
- Natural/Forced
- Thermal Model
Solder Joint Calculator
Analyze solder joint reliability based on CTE mismatch and thermal cycling.
- CTE Analysis
- Fatigue Life
- Engelmaier Model
Thermal Relief Calculator
Design thermal relief patterns for improved solderability.
- Spoke Design
- Opening Ratio
- Current Capacity
Flex Circuit Calculator
Calculate minimum bend radius for flexible PCB designs per IPC-2223.
- Bend Radius
- IPC-2223
- Dynamic/Static
LC Tank Calculator
Calculate LC resonant circuit parameters for RF and filter design.
- Resonant Freq
- Q Factor
- Bandwidth
RC Time Constant Calculator
Calculate RC circuit time constants, cutoff frequency, and charge curves.
- Time Constant
- Cutoff Freq
- Charge Curve
PCB Weight Calculator
Estimate PCB weight based on dimensions, layers, and materials.
- Material Weight
- Copper Weight
- Shipping Est
Copper Thickness Converter
Convert between copper weight (oz) and thickness (µm/mil).
- oz ↔ µm
- oz ↔ mil
- Quick Reference
Why Use Our PCB Tools?
Our PCB calculators and tools are designed by engineers for engineers. Each PCB tool uses industry-standard formulas and is regularly updated to ensure accuracy for your PCB design projects.
Instant Calculations
Get PCB calculation results instantly without registration or downloads.
Industry Standards
All PCB calculators follow IPC standards for accurate, reliable results.
Engineer Tested
Developed and verified by experienced PCB design engineers.
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