Statistics & Probability

Z-Score Calculator

Lets users solve and check z-score instantly with formula, steps and examples — no manual math.

Enter your details

Your result
Z-score
1.5

z = (85 − 70) / 10 = 1.500 (≈ 93.3th percentile)

Percentile
93.32%

About this calculator

A z-score measures how many standard deviations a value sits from the mean: z = (x − μ)/σ. A z of +1.5 means 1.5 SD above average, roughly the 93rd percentile.

Frequently asked questions

Why CalcBreeze

  • ✔ Verified formulas, instant recalculation
  • ✔ Works on every device, no signup needed
  • ✔ Save, share & export results
  • ✔ 1100+ calculators across 50+ categories
  • ✔ Pixel-consistent design across every tool

Explore more Statistics & Probability calculators