Calculate either the charge, capacitance or voltage across a capacitor using Q=CV.

Calculate the value of a resistor needed to current-limit an LED.

The hammer in any electrical engineers toolbox. Calculate voltage, resistance and current using Ohm's law.

Resistor dividers are a simple, widely-used circuit primitive for reducing a voltage based on a fixed ratio.

Find the closest E-series (e.g. E12, E96) resistor (preferred value) to your desired resistance.

Find the right size wire gauge for a particular current and voltage drop.

The low-pass RC filter is probably the simplist and most used electronic filter. Great for input signal filtering.

Calculate the resistor and capacitors values for a 555 timer in astable configuration.

A calculator to help you use the MP4558 IC in your next PCB. Calculates passive component values, frequencies, currents, e.t.c.

A calculator for working out the impedance of a standard microstrip style track.

PCB track current carrying capability calculator, using the IPC-2152 standard.

PCB track current carrying capability calculator, using the IPC-2221a standard.

PCB via current carrying capability calculator, using the IPC-2221A standard.

Calculator the thermal resistance of a via.

Calculate the dew point using the Magnus equation.

Calculate the temperature, resistance (reference or actual), or beta-coefficient of NTC thermistors.

This calculator can be used to calculate the values of the critical component values for a buck converter.

Rotate objects in 3D using angle-axis, rotation matrices, euler angles or quaternions.

Calculate CRC values from either a large number of popular CRC algorithms or define one yourself.