Z-Table Calculator

Find Probabilities in Normal Distribution

Area to the left: 0.9750
Area to the right: 0.0250
Z-Score Probability
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Understanding Z-Scores

A z-score represents how many standard deviations away from the mean a data point is. It allows us to compare values from different normal distributions by converting them to a standard scale.

Common Z-Score Values

Z = ±1.645

90% confidence level

Z = ±1.96

95% confidence level

Z = ±2.576

99% confidence level