Catalog of online tools for electrical and electronic conversion, identification and calculation.
- My Toolbox includes
- LM317 Calculator
- Microphone Sensitivity Calculator
- Ohm's Law Calculator
- Resistor Calculator
- Capacitor Calculator
- Visual555 - my version of an astable/monostable calculator with animations
- WolframAlpha general purpose tool that knows how to calculate most properties related to electronics (if you can provide the formula)
- Online Conversion Calculators by DigiKey - collection of conversion and calculation tools, including
- 555 Timer Calculator
- Attenuator Calculator
- Battery Life Calculator
- Capacitance Conversion
- Capacitor Safety Discharge Calculator
- Current Divider Calculator
- dBm to Watts Conversion
- Decimal Fraction Conversion
- Electrical Plug Reference Calculator
- Energy Conversion
- Force Conversion
- Frequency to Wavelength Conversion
- Inductance Conversion
- LED Series Resistor Calculator
- Length Conversion
- Low Pass/High Pass Filter Calculator
- Number Conversion
- Ohm's Law Calculator
- Parallel and Series Resistor Calculator
- PCB Trace Width Calculator
- Pressure Conversion
- Reactance Calculator
- Resistor Color Code Calculator
- Series and Parallel Capacitor Calculator
- SMD Capacitor Code Calculator
- SMD Resistor Code Calculator
- Temperature Conversion
- Three Phase Calculator
- Time Constant Calculator
- Trace Impedance Calculator
- Voltage Divider Calculator
- Volume Conversion
- Weight Conversion
- Wire Size Conversion Calculator
- 66pacific Online Calculators including:
- Small Transmitting Loop Antennas
- Full-Wave Loop Antennas
- Quarter-Wave Vertical Antennas
- Coil-Shortened Vertical Antennas
- Dipole Antenna Length
- Coil-Shortened Dipole Antenna
- Coil Inductance
- Toroid Coil Winding
- Wire Gauge & Diameter
- Capacitance (Capacitor Design)
- Capacitive Reactance (Xc)
- Inductive Reactance (XL)
- Body Mass Index (BMI) Calculator
- daycounter Electronics Calculators Index - large list of online calculators including:
- Passive Component Properties
- Air Core Inductor Coil Inductance Calculator
- AWG (American Wire Gauge) Diameter and Resistance Chart
- Capacitor-Energy-Time-Constant-Calculator
- Coil Physical Properties Calculator
- Inductor Stored Energy Calculator
- Parallel Resistance Calculator
- Parallel Resistor Combination Calculator
- Plate Capacitor Capacitance Calculator
- Reactance Calculator
- RMS and Average Calculator
- Standard Resistor Value Calculator
- Steinhart-Hart Thermistor Calculator
- Straight Wire Inductor Calculator
- Solenoid Force Calculator
- Thermal Noise Calculator
- Voltage Divider Calculator
- Voltage Summer Calculator
- WheatStone Bridge Calculator
- Series - Parallel Impedance Conversion Calculator
- Electronics
- BJT Cascode Amplifier Calculator
- BJT Differential Amplifier Calculator
- BJT Transistor as a Switch, Saturation Calculator
- Comparator Hysteresis Calculator
- How to wire an LED, Tutorial and Resistor Calculator
- JFET Buffer Bias Calculator
- MSP430 UART Register Value Calculator
- NE555 Astable Multivibrator (Oscillator) Frequency and Duty Cycle Calculator
- NPN Transistor Bias Calculator
- Op-Amp (Inverting) Resistor Calculator
- Op-Amp (Non-Inverting) Resistor-Calculator
- Op-Amp Voltage Calculator
- Filters
- Sallen-Key Low Pass Filter Calculator
- Sallen-Key High Pass Filter Calculator
- LC Low Pass Butterworth Filter Calculator
- Motors
- Stepper Motor Calculator
- Lead Screw Torque Calculator
- Power Supplies
- LM25085 Switching Regulator Calculator
- Data Logger Battery Life Calculator
- Flyback Transformer Design and Calculator
- Flyback SMPS Calculator
- Heat Sink Temperature Calculator
- Inductor Current and Maximum Power Calculator
- Inrush Current Limiting Load Switch Calculator
- Voltage Regulator Resistor Divider Calculator
- Snubber Design Calculator
- Switching Power Supply Calculator
- RF
- Complete RF Amplifier Design and Analysis Calculator
- Decibel Calculator
- Friis Path loss Calculator
- Helical Antenna Design Calculator
- LC Resonance Calculator
- L Matching Network Calculator
- Maximum Field Strength Calculator
- Maximum Flux Density Calculator
- Microstrip Inductor Calculator
- PI and T Pad Attenuator Calculator
- Quarter Wavelength Transformer Calculator
- Rollet Stability (K) Factor Calculator
- Skin Effect Depth Calculator
- Whip Antenna Design Calculator
- Z-S-Y Parameter Conversion Calculator
- Mechanical Engineering
- Helical Spring Mandrel Design Calculator
- CAD/CAM
- Bevel Gear Calculator
- Feed Rate Calculator
- GCode-Tool Path Generator for Milling Circles
- G-Code Tool Path Generator for Drilling Holes
- GCode-Tool Path Generator for Milling Inner of Rectangles
- GCode Tool Path Generator for Planing Stock with Fly Cutter
- GCode Tool Path Generator for Series of Points
- GCode Tool Path Generator for Trimming End Stock
- Geometric Scaling of a Triangle
- Line Segment Angle Calculator
- Polar / Rectangular Coordinate Conversion Calculator
- Pully Speed Calculator
- Timing Belt Pulley Design Calculator
- Programming
- Exponentially Decaying Wave Lookup Table Generator Calculator
- Sine Lookup Table Generator Calculator
- Triangle Wave Lookup Table Generator Calculator
- Passive Component Properties
- MUST online calculators for electronics - another large collection
- Ohm's Law - a collection of a few calculators and references, including
- Ohm's Law Calculator
- Voltage Divider Calculator
- mcd to Lumens Converter
- LED Resistor Calculator
- 555 Astable Circuit Calculator
- 555 Monostable Circuit Calculator
- Other specific calculators
- Graphical Resistor Calculator - Danny Goodman
- Capacitor Code Calculator
- Online calculator - 4 digit SMD resistor
- Visual555 - 555 Timer astable/monostable calculator with animations