Free z-score calculator to calculate z-score. Instant results in your browser — no signup.
z-score calculator, math z score, Calculate z-score, z score calculator, standard score, z value, calculate z score calculator, calculate z-score
Enter values and calculate an instant answer.
Enter the values, then calculate.
Results update when you click Calculate.
Primary answer and useful breakdowns.
Z-score
1.5000
z = (85.0000 − 70.0000) / 10.0000
Approx. percentile
93.32%
Free z-score calculator to calculate z-score. Instant results in your browser — no signup. z = (x − μ) / σ measures distance from the mean in standard-deviation units.
z = (x − μ) / σ measures distance from the mean in standard-deviation units.
85 with μ=70, σ=10 → z = 1.5.
Percentile hint assumes an approximate normal distribution.