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Resistors in Series Calculator
Enter resistor values in ohms (Ω), separated by commas, to calculate total resistance for a series circuit and see the combined value in ohms instantly.
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Resistor Color Code Calculator
Enter the 1st band, 2nd band, multiplier, and tolerance colors to decode a 4‑band resistor and get its resistance value in ohms with tolerance.
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Ohm's Law Calculator
Enter any two values—voltage (V), current (A), resistance (Ω), or power (W)—to compute the others instantly and check basic circuit values.
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LED Light Resistor Calculator
Enter supply voltage, LED forward voltage, and forward current to compute the required series resistor value for safe LED operation in your circuit.
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Parallel Resistor Calculator
Enter resistor values in ohms (Ω), separated by commas, to instantly find the equivalent resistance of multiple resistors connected in parallel.
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