`R_123 = (1/R_1+1/R_2+1/R_3)^(-1)`

Enter a value for all fields

The Resistance of 3 Resistors in Parallel is found using  the following formula: `R_(123)=(1/R_1+1/R_2+1/R_3)^(−1)` where:

• `R_1` = Resistance 1
• `R_2` = Resistance 2
• `R_3` = Resistance 3

References

21.8 Series and parallel circuits by Benjamin Crowell, Light and Matter  licensed under the Creative Commons Attribution-ShareAlike license.