Enter any two values. While entering your 2nd value the remaining values will be calculated and filled in automatically.

I | = | Current | = | Amps | |

P | = | Power | = | Watts | |

R | = | Resistance | = | Ohms | |

V | = | Voltage | = | Volts | |

I | = | V ÷ R | = | P ÷ V | = | √P ÷ R |

P | = | V x I | = | V^{2} ÷ R | = | I^{2} x R |

R | = | V ÷ I | = | P ÷ I^{2} | = | V^{2} ÷ P |

V | = | I x R | = | P ÷ I | = | √P x R |