Find the closest standard resistor value for 1%, 5%, 0.1% E-Series components.

Design voltage dividers with standard resistor values. Provides error and current.

Design an RC filter (low-pass or high pass) with standard component values.

Create a custom resistor value using series or parallel standard resistors.

Convert between dBm, Watts, Peak Volts, and RMS Volts. Set a custom load resistance.

Convert between decimal, hexadecimal, hexadecimal numbers. View bit positions.

Convert frequency to wavelength, and vice-versa.

Calculates energy stored in a capacitor, given its capacitance and voltage. Works in reverse too.

Find minimum slew rate needed for a given amplitude and frequency. Also works in reverse.

Finds an optimal LED series resistor for a given current or brightness.

Find a resistor's value and tolerance based on its color code.

Find RMS voltage of a sine wave given its peak voltage. Also works in reverse.

Design ideal transformers and generate LTspice models.