1kΩ and 2.2kΩ in parallel = 687.5Ω
Worked answer for a 1kΩ and a 2.2kΩ resistor wired in parallel.
Equivalent resistance 687.5Ω 1kΩ and 2.2kΩ in parallel
| Resistor 1 (R1) | 1kΩ |
| Resistor 2 (R2) | 2.2kΩ |
| Connection mode | parallel |
| Formula | R = 1 / (1/R1 + 1/R2) |
| Equivalent resistance | 687.5Ω |
Resistors in parallel always give an equivalent resistance smaller than the smallest resistor in the group.
Different values? Add as many resistors as you like and switch between series and parallel in the interactive tool:
Open the Series / Parallel Resistor Calculator →Disclaimer: This is the ideal equivalent resistance. Real resistors have a tolerance (typically ±1% to ±5%), so the measured value will vary slightly. Confirm against your components' tolerance band when precision matters.