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Add up any number of resistors in series or parallel, in Ω, kΩ, or MΩ, with both totals and the working.
Also covers: Series resistance calculator · Parallel resistance calculator · Equivalent resistance · Resistors in parallel
Total resistance (series)
1.32 kΩ
1,320 Ω from 3 resistors.
In series
1.32 kΩ
R = R₁ + R₂ + …
In parallel
64.33 Ω
1/R = 1/R₁ + 1/R₂ + …
Resistors
3
Working
Series resistors are connected end to end; parallel resistors are connected across the same two points.
Add as many as you need, each in Ω, mΩ, kΩ, or MΩ.
The equivalent resistance for your connection, the total for the other connection too, and the working.
Simply add them: R = R₁ + R₂ + … The same current flows through each one, so the total is always larger than the largest resistor.
Add the reciprocals: 1/R = 1/R₁ + 1/R₂ + … For two resistors that's R = R₁R₂ / (R₁ + R₂). The total is always smaller than the smallest resistor.
Work from the inside out: find the total of each parallel group here, then enter those totals as series resistors (or the other way round).
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