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Root mean square

Measure the effective magnitude of signed values.

How this works

RMS = √[Σx²/n].

Example

Using the example inputs, rms is 3.5355339059.

Values
3, 4
RMS
3.5355339059

Scope and assumptions

Uses your inputs only; results are rounded for display.

NIST statistical methods handbook

Related calculators

Interquartile range

Harmonic mean

Mean, median & mode

Weighted average

Geometric mean

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