What is the von Klitzing constant?
The von Klitzing constant is R_K = 25,812.80745 Ω, exact by SI definition. It equals h/e^2.
Open the interactive PhysRef tool →Key facts
| Value | 25812.80745 Ω |
|---|---|
| Symbol | R_K |
| Relation | R_K = h/e^2 |
| Exactness | Exact by SI definition (uncertainty 0) |
| Source | CODATA 2018 |
Frequently asked questions
What is the value of the von Klitzing constant?
R_K = 25,812.80745 Ω, the quantized Hall resistance unit, equal to h/e^2.
What is the von Klitzing constant used for?
It defines the modern ohm standard via the quantum Hall effect, with resistance plateaus at R_K/integer.
How is R_K related to the conductance quantum?
R_K = 2/G_0, so it is twice the inverse of the conductance quantum.
Related pages
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