Resistors in Parallel Calculator

Resistors in Parallel Calculator is a useful tool in electronics to quickly determine the total resistance of resistors connected in parallel. In a parallel configuration, the equivalent resistance is always lower than the smallest individual resistor in the group. This setup is widely used in circuit design when current sharing or load balancing is required, such as in power supplies, lighting systems, and other electronic devices.

The formula for calculating the total resistance of resistors in parallel is:
$$\frac{1}{R_{\text{total}}} = \frac{1}{R_1} + \frac{1}{R_2} + \frac{1}{R_3} + \dots + \frac{1}{R_n}$$

For two resistors in parallel, the total resistance simplifies to:

$$R_{\text{total}} = \frac{R_1 \cdot R_2}{R_1 + R_2}$$

Example: If two resistors of 1.2kΩ and 2.2kΩ are connected in parallel, the total resistance is:

$$\frac{1}{R_{\text{total}}} = \frac{1}{1200} + \frac{1}{2200}$$ $$R_{\text{total}} = 680 \, \Omega$$

Want to explore resistors in more detail? Discover how to select the right ones for your circuits in our complete guide on resistor types and applications.

Instead of calculating manually, you can use our interactive Parallel Resistor Calculator below. Just select the number of resistors, enter their values, and it instantly computes the equivalent resistance.

Resistors in Parallel Calculator

Select number of resistors:

Equivalent Resistance = — Ω

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