doomath Calculator
Z-Score Calculator
Calculate how many standard deviations a value is from a mean.
InputsChange a value to recalculate instantly
ResultUpdates as you type
FORMULA & STEPSZ-Score Calculator — Mathematical Derivation & Steps
λ DooMathWork with this calculation
Local · deterministic · optionalQuick mathNatural-language-style shortcuts for deterministic arithmetic.
Calculator guide
How to use the Z-Score Calculator
Calculate how many standard deviations a value is from a mean.
01Set inputsChoose values, units and assumptions.
02Apply the modelz = (x−μ) ÷ σ
03Read the resultCheck the output against the assumptions before using it.
What this calculator does
Calculate how many standard deviations a value is from a mean.
Formula & method
z = (x−μ) ÷ σ
Assumptions & notes
Review the inputs, units and assumptions before using the result for a real decision.