Calculate total resistance for resistors connected in series. Add as many resistors as you need — the circuit is illustrated automatically.
Up to 8 resistors.
With a series connection, the resistors sit one after another along the same current path. Current has to flow through every single resistor, so total resistance is simply the sum of all the resistors:
The more resistors you connect in series, the higher the total resistance becomes — and total resistance is always higher than the highest single resistor in the combination.
With a series connection, current has to flow through every resistor one after another along the same path, so each resistor adds its own share of resistance. Total resistance is therefore always the sum of all the individual resistors.
The calculator supports up to 8 resistors in series. The principle is the same no matter how many: you simply add all the resistance values together.
Series connections are often used to divide a voltage or limit the current in a circuit, for example in simple LED circuits, or to build a specific resistance value by combining several standard values.