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Engineering Calculators

54 free tools

Resistors

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

Capacitors & Inductors

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  • Capacitor Charge
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  • Coil Inductance
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Timing & Signals

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Power & Wiring

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  • LED Resistor
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  • Battery Life
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  • 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
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  • 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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  • Stripline Impedance
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  • 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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