Math · NUMORA
Z Score Calculator
z = (x−μ)/σ, then a two-tailed p.
Open interactive calculatorHow to use
z-score and p-value: a normal sketch, not a stats suite.
Formula
z=(x−μ)/σ; p=2(1−Φ(|z|))
FAQ
Is this Z Score calculator accurate?
The formula and assumptions are shown on the page, and the engine is covered by audit tests. Results are for reference — not financial or medical advice.
Do I need an account?
No. Calculations run in your browser. Recents can stay on this device.
What inputs do I need?
z-score and p-value: a normal sketch, not a stats suite.
Related calculators
- Percentage calculatorPercent, part, whole — solve any one.
- Percentage Change calculatorHow much something moved from old to new.
- Decimal To Fraction calculatorFinite decimals to lowest terms.
- Fractions calculatorAdd, subtract, multiply, divide, then simplify.
- Prime Factors calculatorFactor an integer and write the exponents.
- Decimal Hex calculatorThe programmer's everyday bases.
- Roman Numerals calculatorConvert 1–3999 both ways.
- Sig Figs calculatorRound to N significant figures.