StatCalcPro

Professional Statistics Calculators for Students & Researchers

Fast, accurate, and educational. All calculations are performed locally in your browser—your data never leaves your device.

Available Calculators

Calculate standard deviation for sample or population data with step-by-step explanations.

Find measures of central tendency including quartiles and range.

Calculate variance and understand data spread for sample or population.

Count, round, and perform arithmetic with proper significant figure rules.

Calculate z-scores and understand how values relate to the mean.

Find percentile ranks and values at specific percentiles in your dataset.

Calculate Pearson's correlation coefficient and visualize relationships.

Determine required sample size for surveys and experiments.

Compare multiple datasets side-by-side to analyze statistical differences

All calculations happen in your browser. Your data never leaves your device.

Step-by-step explanations help you understand the mathematics behind each calculation.

Instant results with precision control. Perfect for students, researchers, and professionals.

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