Z-Score Calculator is a free online tool that quickly calculates the z-score for any given value using the mean and standard deviation. Simply enter your data point (X), the dataset’s mean (μ), and the standard deviation (σ), and the calculator will instantly show the z-score. A z-score tells you how many standard deviations a value is away from the mean. Positive z-scores indicate values above the average, while negative z-scores indicate values below the average. This calculator is especially useful for students, teachers, and researchers who need accurate results in statistics, probability, and data analysis