Two or more resistors wired in parallel always combine into a single equivalent resistance that is smaller than the smallest of them. This calculator adds up any list of parallel resistors for you using the reciprocal formula, where one over the total equals the sum of one over each resistor. Parallel resistors show up whenever you want to lower a resistance you do not have on hand, share current across several paths, or build a precise value from standard parts. Enter your resistor values separated by commas or spaces, in ohms, and the tool returns the exact equivalent resistance along with the conductance. It handles two resistors or twenty, and if you enter two equal resistors you will see the familiar result of exactly half the value. Everything runs locally in your browser, so it is instant and private.
Two or more resistors wired in parallel always combine into a single equivalent resistance that is smaller than the smallest of them. This calculator adds up any list of parallel resistors for you using the reciprocal formula, where one over the total equals the sum of one over each resistor.
Yes. Resistors in Parallel Calculator is completely free, with no sign-up and no usage limits.
Yes. Resistors in Parallel Calculator runs in any modern web browser. There is nothing to download or install.
Yes. Resistors in Parallel Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.