#### This page has some useful calculators for radio amateurs.

**Ohm's Law Calculator**

Voltage | Current | ||||

Voltage | Resistance | ||||

Resistance | Current |

**Power Calculations.**

Power | Impedance | ||||

Power | Impedance |

**Inductors and Capacitors Reactance Calculator**

Capacitance | Frequency | ||||||

Inductance | Frequency |

**Inductors and Capacitors Series and Parallel Circuits**

Parallel Circuits block at resonance series circuits pass at resonance. This section will calculate the resonant frequency of a circuit when you put in both the capacitor and inductor values. More usefully it can calculate the capacitor needed for a particular frequency when the inductor value is known or the inductor value for that frequency if the capacitance is known.

Inductance | Capacitance | ||||||

Required Frequency |
Known Inductor | ||||||

Required Frequency |
Known Capacitor |