A practical toolbox for electrical and electronics work
CircuitMix Tools brings together common calculators used for circuit design, component selection, electrical load checks, learning, troubleshooting and quick field estimates.
Updated with 500+ practical electrical, electronics, solar, wind, digital logic and reference tools by CircuitMix.
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Clear formulas, units and practical outputs
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Designed for phones, tablets and desktop use
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Useful for makers, electricians and students
Browse tools by category
Choose a category and jump directly to that section on this page. No separate category pages are needed.
Electrical 28 toolsCable sizing, motors, breakers, VFD, UPS, fault current, earthing and field checks.View tools โ
Electronics 41 toolsResistors, capacitors, 555, MOSFETs, PCB, op-amp, regulators and converters.View tools โ
Solar PV 31 toolsPanel output, batteries, MPPT, strings, off-grid sizing, ROI, payback and losses.View tools โ
Wind Energy 11 toolsPower, energy, RPM, TSR, swept area, torque, efficiency, blade length and payback.View tools โ
Digital Logic 12 toolsBinary, truth tables, Boolean algebra, K-map, flip-flops, MUX/DEMUX and converters.View tools โ
Quick Reference 15 toolsPinouts, charts, wire colors, USB, RJ45, SMD packages and battery voltage tables.View tools โ
Electrical, electronics, solar, wind and logic tools in one place
CircuitMix Tools is organized as a practical hub for electronics design, field electrical checks, solar PV sizing, wind energy estimates and digital logic learning.
For electronics work, start with Ohm's Law, LED Resistor, SMD Resistor Code, Capacitor Code, 555 Timer, 555 PWM, Buck Converter Inductor, MOSFET Gate Resistor, MOSFET Power Loss, ADC Resolution, NTC Thermistor Divider and PCB Trace Width.
For electrical field work, use Wire Gauge & Cable Size, Voltage Drop, Single & 3-Phase Power, kVA to Amps, Motor Current, Breaker Size, Conduit Fill, Short Circuit Current, Earthing Conductor Size, Cable Derating and Generator Size.
For solar PV work, use Solar Panel Output, Peak Sun Hours, Solar Battery Bank, String Sizing, MPPT Charge Controller and Solar ROI.
For digital logic and conversion, use Binary Converter, Logic Gate Calculator, Boolean Algebra, K-Map Solver and mcd to Lumens Converter.
๐ No tools found for "" โ try solar, wind, logic, MOSFET, PWM, conduit, short circuit, motor, cable, voltage drop, power factor or LED.
๐ง Electronics Makers
Circuit design, component values, timing, PWM, filters, MOSFETs, regulators, ADCs, PCB and power-electronics helpers. 41 tools.
Ohm's Law Calculator
Solve voltage, current, resistance and power with unit support.
LED Resistor Calculator
Find the safe resistor value for LED circuits.
Voltage Divider Calculator
Calculate output voltage using two resistors.
Resistor Color Code
Decode 4-band and 5-band resistor colors.
SMD Resistor Code
Decode surface-mount resistor markings.
Series & Parallel Resistor Calculator
Calculate equivalent resistance for series and parallel networks.
Current Divider Calculator
Find branch current in parallel resistor circuits.
RC & RL Filter Calculator
Calculate cutoff frequency and time constant.
555 Timer Calculator
Calculate frequency and duty cycle for 555 circuits.
Battery Life Calculator
Estimate battery runtime from capacity, voltage, load and efficiency.
Capacitor Code Calculator
Decode capacitor markings and optional tolerance codes.
Inductor Color Code Calculator
Decode inductor color bands and tolerance values.
LC Resonance Calculator
Calculate resonant frequency from inductance and capacitance.
PCB Trace Width Calculator
Estimate PCB trace width from current, copper thickness and temperature rise.
Reactance Calculator
Calculate capacitive reactance, inductive reactance, impedance and resonance.
Arduino ADC Voltage Calculator
Convert Arduino ADC readings to voltage and scale sensor inputs.
I2C Pull-up Resistor Calculator
Choose practical I2C pull-up resistor values from bus voltage, capacitance and speed.
Capacitor Series & Parallel Calculator
Calculate equivalent capacitance for series and parallel capacitor networks.
Inductor Series & Parallel Calculator
Calculate equivalent inductance for series and parallel inductor networks.
Op-Amp Calculator
Calculate common op-amp gain values for inverting and non-inverting circuits.
Power Dissipation Calculator
Calculate resistor, transistor and load power dissipation from voltage, current or resistance.
555 PWM Calculator
Calculate PWM frequency, duty cycle and timing values for 555 timer PWM circuits.
Buck Converter Inductor Calculator
Estimate buck converter inductor value from input voltage, output voltage, current, frequency and ripple.
Pull-up Resistor Calculator
Calculate pull-up resistor values for digital inputs, logic circuits and open-drain outputs.
RC Debounce Calculator
Calculate RC debounce timing for push buttons, switches and digital inputs.
PWM Duty Cycle Voltage Calculator
Convert PWM duty cycle to average voltage and estimate output level from supply voltage.
ADC Resolution Calculator
Calculate ADC step size, resolution and voltage per count for analog-to-digital converters.
NTC Thermistor Divider Calculator
Calculate NTC thermistor voltage divider output for temperature sensing circuits.
MOSFET Power Loss Calculator
Estimate MOSFET conduction loss, switching loss and total power dissipation.
MOSFET Gate Resistor Calculator
Estimate MOSFET gate resistor values using gate charge, drive voltage and switching time.
Voltage Regulator Heat Sink Calculator
Estimate heat sink thermal resistance for linear voltage regulators and power devices.
Boost Converter Calculator
Calculate boost converter for electronics circuit design and troubleshooting.
Buck Boost Converter Calculator
Calculate buck boost converter for electronics circuit design and troubleshooting.
LM317 Calculator
Calculate lm317 for electronics circuit design and troubleshooting.
Zener Diode Resistor Calculator
Calculate zener diode resistor for electronics circuit design and troubleshooting.
Transistor Base Resistor Calculator
Calculate transistor base resistor for electronics circuit design and troubleshooting.
RC Time Constant Calculator
Calculate rc time constant for electronics circuit design and troubleshooting.
RLC Circuit Calculator
Calculate rlc circuit for electronics circuit design and troubleshooting.
PCB Via Current Calculator
Calculate pcb via current for electronics circuit design and troubleshooting.
PCB Trace Impedance Calculator
Calculate pcb trace impedance for electronics circuit design and troubleshooting.
dB / dBm / dBV Converter
Calculate db / dbm / dbv converter for electronics circuit design and troubleshooting.
โก Electrical & Electrician Tools
Cable sizing, load current, motor, protection, generators, UPS, starters, earthing, faults, conduit and field electrical checks. 28 tools.
Wire Gauge & Cable Size Calculator
Convert AWG to mmยฒ and estimate ampacity.
Single & 3-Phase Power Calculator
Calculate kW, kVA, HP, current and power.
Motor Current Calculator
Estimate full-load current for motors.
Circuit Breaker Size Calculator
Select a practical breaker rating from load current.
Voltage Drop Calculator
Calculate voltage drop over cable runs.
Power Factor Calculator
Calculate kW, kVA, kVAR and correction capacitor size.
kVA to Amps Calculator
Convert kVA to current for single-phase and three-phase systems.
Transformer Size Calculator
Estimate transformer kVA size from voltage, current, phase and load.
Power Factor Correction Capacitor Calculator
Calculate capacitor bank size needed to improve power factor.
Star Delta Conversion Calculator
Convert resistor networks between star/wye and delta configurations.
Transformer Fault Current Calculator
Estimate transformer secondary fault current using kVA, voltage and impedance percentage.
Generator Size Calculator
Estimate generator kVA size from load, power factor, starting load and safety margin.
Cable Derating Calculator
Calculate cable derating for temperature, grouping and installation conditions.
Contactor Size Calculator
Select a practical contactor size for motors and electrical loads.
Motor Starting Current Calculator
Estimate motor starting current for DOL, star-delta, soft starter and VFD starts.
Voltage Unbalance Calculator
Calculate three-phase voltage unbalance percentage from phase-to-phase voltages.
Short Circuit Current Calculator
Estimate short-circuit current using voltage and source or circuit impedance.
Earthing Conductor Size Calculator
Estimate protective earth conductor size using fault current and clearing time.
Cable Tray Fill Calculator
Estimate cable tray fill area and usable capacity for multiple cable runs.
Conduit Fill Calculator
Calculate conduit fill percentage based on conduit size and cable outside diameters.
Overload Relay Setting Calculator
Calculate overload relay setting for practical electrical sizing and field checks.
VFD Size Calculator
Calculate vfd size for practical electrical sizing and field checks.
Soft Starter Size Calculator
Calculate soft starter size for practical electrical sizing and field checks.
UPS Size Calculator
Calculate ups size for practical electrical sizing and field checks.
Electrical Load Calculator
Calculate electrical load for practical electrical sizing and field checks.
Motor Cable Size Calculator
Calculate motor cable size for practical electrical sizing and field checks.
Full Load Current Calculator
Calculate full load current for practical electrical sizing and field checks.
Fault Loop Impedance Calculator
Calculate fault loop impedance for practical electrical sizing and field checks.
๐ Solar PV Tools
Solar panel output, off-grid sizing, batteries, MPPT, string sizing, cable loss, tilt, ROI, payback and PV system planning. 31 tools.
Peak Sun Hours Calculator
Calculate and estimate peak sun hours for solar PV system design.
Solar Panel Output Calculator
Calculate and estimate solar panel output for solar PV system design.
Solar Battery Bank Calculator
Calculate and estimate solar battery bank for solar PV system design.
Solar Panel Series Parallel Calculator
Calculate and estimate solar panel series parallel for solar PV system design.
MPPT Charge Controller Calculator
Calculate and estimate mppt charge controller for solar PV system design.
Solar String Sizing Calculator
Calculate and estimate solar string sizing for solar PV system design.
Solar Kwh To Panel Count Calculator
Calculate and estimate solar kwh to panel count for solar PV system design.
Solar Charge Time Calculator
Calculate and estimate solar charge time for solar PV system design.
Inverter Solar Battery Runtime Calculator
Calculate inverter solar battery runtime for electronics circuit design and troubleshooting.
PV Voc Calculator
Calculate and estimate pv voc for solar PV system design.
PV String Fuse Calculator
Calculate and estimate pv string fuse for solar PV system design.
Solar Cable Loss Calculator
Calculate and estimate solar cable loss for solar PV system design.
Solar Panel Area Calculator
Calculate and estimate solar panel area for solar PV system design.
Solar Panel Efficiency Calculator
Calculate and estimate solar panel efficiency for solar PV system design.
DC/AC Ratio Calculator
Calculate and estimate dc/ac ratio for solar PV system design.
Solar Tilt Angle Calculator
Calculate and estimate solar tilt angle for solar PV system design.
Solar Payback Calculator
Calculate and estimate solar payback for solar PV system design.
Solar Combiner Box Calculator
Calculate and estimate solar combiner box for solar PV system design.
Solar Shading Loss Calculator
Calculate and estimate solar shading loss for solar PV system design.
Solar Roi Calculator
Calculate and estimate solar roi for solar PV system design.
Solar Pump Sizing Calculator
Calculate and estimate solar pump sizing for solar PV system design.
Solar Panel Cleaning Loss Calculator
Calculate and estimate solar panel cleaning loss for solar PV system design.
Solar Battery Backup Calculator
Calculate and estimate solar battery backup for solar PV system design.
Solar Inverter Size Calculator
Calculate and estimate solar inverter size for solar PV system design.
Off-Grid Solar System Calculator
Calculate and estimate off-grid solar system for solar PV system design.
Solar Azimuth Angle Calculator
Calculate and estimate solar azimuth angle for solar PV system design.
Solar Panel Row Spacing Calculator
Calculate and estimate solar panel row spacing for solar PV system design.
Solar Panel Temperature Loss Calculator
Calculate and estimate solar panel temperature loss for solar PV system design.
Solar Panel Degradation Calculator
Calculate and estimate solar panel degradation for solar PV system design.
Solar LCOE Calculator
Calculate and estimate solar lcoe for solar PV system design.
Solar Wind Hybrid System Calculator
Calculate and estimate solar wind hybrid system for solar PV system design.
๐ Wind Energy Tools
Wind turbine power, energy, RPM, swept area, torque, efficiency, blade length, battery charging and payback tools. 11 tools.
Wind Turbine Power Calculator
Calculate wind turbine power for wind turbine sizing and performance checks.
Wind Turbine Energy Calculator
Calculate wind turbine energy for wind turbine sizing and performance checks.
Wind Speed Height Calculator
Calculate wind speed height for wind turbine sizing and performance checks.
Tip Speed Ratio Calculator
Calculate tip speed ratio for wind turbine sizing and performance checks.
Wind Turbine Rpm Calculator
Calculate wind turbine rpm for wind turbine sizing and performance checks.
Wind Turbine Swept Area Calculator
Calculate wind turbine swept area for wind turbine sizing and performance checks.
Wind Turbine Torque Calculator
Calculate wind turbine torque for wind turbine sizing and performance checks.
Wind Turbine Efficiency Calculator
Calculate wind turbine efficiency for wind turbine sizing and performance checks.
Wind Turbine Blade Length Calculator
Calculate wind turbine blade length for wind turbine sizing and performance checks.
Wind Turbine Battery Charging Calculator
Calculate wind turbine battery charging for wind turbine sizing and performance checks.
Wind Turbine Payback Calculator
Calculate wind turbine payback for wind turbine sizing and performance checks.
๐ข Digital Logic & LED Converters
Number systems, truth tables, logic gates, Boolean algebra, K-map, flip-flops, MUX/DEMUX and LED light conversion. 12 tools.
Binary Converter
Convert, simplify or calculate digital logic values for electronics and learning.
Logic Gate Calculator
Convert, simplify or calculate digital logic values for electronics and learning.
Boolean Algebra Calculator
Convert, simplify or calculate digital logic values for electronics and learning.
K-Map Solver
Convert, simplify or calculate digital logic values for electronics and learning.
mcd to Lumens Converter
Calculate mcd to lumens converter for electronics circuit design and troubleshooting.
Truth Table Generator
Convert, simplify or calculate digital logic values for electronics and learning.
Gray Code Converter
Convert, simplify or calculate digital logic values for electronics and learning.
Two's Complement Calculator
Convert, simplify or calculate digital logic values for electronics and learning.
Number System Converter
Convert, simplify or calculate digital logic values for electronics and learning.
Flip Flop Calculator
Convert, simplify or calculate digital logic values for electronics and learning.
MUX / DEMUX Calculator
Convert, simplify or calculate digital logic values for electronics and learning.
Encoder Decoder Calculator
Convert, simplify or calculate digital logic values for electronics and learning.
๐ Quick Reference
Pinouts, wiring references, charts, package sizes, battery voltage, component codes and maker board lookups. 15 tools.
Raspberry Pi GPIO Pinout Reference
Quick Raspberry Pi 40-pin GPIO reference for power, ground and interfaces.
IC Pinout Diagrams
Reference pinout diagrams for common ICs and popular chips.
Standard Resistor Values
Reference chart for common E-series standard resistor values.
Capacitor Code Chart
Quick chart for common capacitor codes and capacitance values.
Wire Color Codes
Electrical wire color code reference for common AC and DC systems.
Arduino Pinout Reference
Quick reference page for arduino pinout reference used in electronics and electrical work.
ESP32 Pinout Reference
Quick reference page for esp32 pinout reference used in electronics and electrical work.
Arduino Nano Pinout Reference
Quick reference page for arduino nano pinout reference used in electronics and electrical work.
SMD Package Size Chart
Quick reference page for smd package size chart used in electronics and electrical work.
AWG to mmยฒ Wire Size Chart
Quick reference page for awg to mmยฒ wire size chart used in electronics and electrical work.
Battery Voltage Chart
Quick reference page for battery voltage chart used in electronics and electrical work.
USB Pinout Reference
Quick reference page for usb pinout reference used in electronics and electrical work.
RJ45 Ethernet Pinout Reference
Quick reference page for rj45 ethernet pinout reference used in electronics and electrical work.
Star Delta Motor Wiring
Calculate star delta motor wiring for practical electrical sizing and field checks.
Sensor Pinout Reference
Quick reference page for sensor pinout reference used in electronics and electrical work.
Free electrical, electronics, solar, wind and reference tools
Use CircuitMix Tools for quick calculations while designing circuits, choosing components, checking electrical loads, selecting wire sizes, estimating motor current, planning solar PV systems, checking wind turbine output or learning digital logic fundamentals.
The homepage now includes all 500+ tools grouped into Electronics Makers, Electrical & Electrician Tools, Solar PV Tools, Wind Energy Tools, Digital Logic & LED Converters and Quick Reference pages, so users can browse by category or use the search bar for direct access.
Results are helpful for quick checks and learning, but final electrical or solar/wind design should always follow local codes, manufacturer datasheets, site conditions and professional approval.
โ Frequently Asked Questions
Are CircuitMix Tools free?
Yes. The calculators and reference tools are free to use without sign-up.
Do these tools work on mobile?
Yes. The homepage and tools are designed for phones, tablets and desktop screens.
Which tools should electricians start with?
Start with Wire Gauge, Power Calculator, kVA to Amps, Voltage Drop, Motor Current, Circuit Breaker Size, Transformer Size and Power Factor calculators.
Which solar tools should I start with?
Start with Peak Sun Hours, Solar Panel Output, Solar Battery Bank, Solar String Sizing, MPPT Charge Controller and Solar ROI calculators.
Which tools are useful for electronics beginners?
Good beginner tools include Ohm's Law, LED Resistor, Resistor Color Code, SMD Resistor Code, Voltage Divider, RC & RL Filter, 555 Timer and Logic Gate calculators.
Are there wind turbine calculators?
Yes. The wind tools include Wind Turbine Power, Wind Turbine Energy and Wind Speed Height calculators.
Can I use the results for final electrical work?
Use the results as practical guidance and quick estimation. Always follow local electrical codes, site conditions, manufacturer data and qualified engineering approval for final work.
How should I use the tools for a wiring job?
Calculate load current first, choose a cable size, verify voltage drop for the actual distance, then select a suitable breaker or protection device according to local code.