Pevlika Browser Apps

Z-Score Calculator

Convert values to z-scores and find normal probabilities and percentiles.

Runs in your browser — nothing is uploaded
Calculate

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How to use Z-Score Calculator

  1. Enter your values — the unit for each field is shown next to it.
  2. The result updates instantly as you type.
  3. Copy the results, or change inputs to compare scenarios.

Formula & assumptions

z = (x − μ) / σ

Example: x = 85, μ = 70, σ = 10 → z = 1.5, about the 93rd percentile.

Normal Distribution CalculatorProbabilities below, above or between values, and inverse normal. Percentile CalculatorThe value at any percentile, or the percentile rank of a value. Confidence Interval CalculatorConfidence intervals for a mean (t or z) or a proportion. Statistics CalculatorMean, median, mode, standard deviation, variance and quartiles of a list.