➗ Root Mean Square Calculator
Calculate the root mean square of values.
Result
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How this calculator works
Calculate the root mean square of values.
Formula
RMS=√(Σx²/n)
Example
3 and 4 have RMS about 3.54.
Frequently asked questions
What does the Root Mean Square Calculator do?
Calculate the root mean square of values.
Are the results exact?
The calculator follows the displayed formula. Rounded display values may differ slightly from full-precision results.
Can I use negative or decimal values?
Most fields accept decimals and negative values when they make sense for the formula.
How should I check an important result?
Review the formula, verify your entries, and confirm high-stakes work with a qualified teacher or professional.