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Engineering Calculators

54 free tools

Resistors

  • Parallel Resistor
  • Series Resistor
  • Voltage Divider
  • Resistor Colour Code
  • Standard Resistor Value
  • Resistor Power Rating
  • NTC Thermistor
  • SMD Resistor Code
  • LED Series Parallel Array

Capacitors & Inductors

  • Parallel Capacitor
  • Series Capacitor
  • Capacitor Charge
  • Capacitive Reactance
  • Inductive Reactance
  • LC Resonance
  • Capacitor Code
  • Coil Inductance
  • Series RLC Impedance

Timing & Signals

  • RC Time Constant
  • 555 Timer
  • PWM
  • Op-Amp Gain
  • RC Low Pass and High Pass Filter
  • RL Time Constant
  • Decibel
  • RMS, Peak and Average
  • Frequency and Wavelength

Power & Wiring

  • Ohm's Law
  • LED Resistor
  • Wire Gauge and Voltage Drop
  • Zener Diode Voltage Regulator
  • Battery Life
  • LM317 Voltage Regulator
  • Transformer Turns Ratio
  • Ripple Voltage and Smoothing Capacitor
  • Buck Converter Inductor
  • Heatsink Thermal Resistance
  • Battery Charge Time

PCB Design

  • PCB Trace Width
  • PCB Via Current Capacity
  • PCB Trace Resistance
  • Microstrip Impedance
  • Stripline Impedance
  • Differential Pair Impedance
  • Coplanar Waveguide Impedance
  • PCB Plane Capacitance
  • Via Inductance
  • PCB Trace Inductance
  • PCB Crosstalk
  • PCB Copper Pour Thermal Resistance
  • Solder Stencil and Paste Volume
  • PCB Annular Ring and Pad Size
  • Thermal Via Array
  • PCB Panelization

Every calculator draws the circuit live and comes with a worked guide. Values type as 4k7, 100n or 2.2M.

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PCB Tools

16 calculators
  • PCB Trace Width
  • PCB Via Current Capacity
  • PCB Trace Resistance
  • Microstrip Impedance
  • Stripline Impedance
  • Differential Pair Impedance
  • Coplanar Waveguide Impedance
  • PCB Plane Capacitance
  • Via Inductance
  • PCB Trace Inductance
  • PCB Crosstalk
  • PCB Copper Pour Thermal Resistance
  • Solder Stencil and Paste Volume
  • PCB Annular Ring and Pad Size
  • Thermal Via Array
  • PCB Panelization
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