Skip to content

Z-Score Calculator

Standardize a data point and estimate its normal-distribution tail probabilities.

Z-score
1.5
1.5 standard deviations above the mean
Left-tail probability93.319%
Right-tail probability6.681%
Two-tail probability13.361%

About the Z-Score Calculator

Standardize a data point and estimate its normal-distribution tail probabilities.

It runs entirely in your browser — nothing you type is sent to a server — and the result updates as you edit the inputs. Estimates are for educational and informational purposes only; see ourdisclaimer.

Common searches

Related calculators

P-Value CalculatorConvert a Z statistic to a left-, right-, or two-tailed normal p-value.Standard Deviation CalculatorCalculate sample or population standard deviation and variance from a data set.

Browse more inMath.