Statistics & Analysis
Statistical calculators developed by data scientists and statisticians. Our analysis tools provide accurate computations for probability, distributions, hypothesis testing, and data analysis, essential for researchers, analysts, and students.
Statistics & Analysis
A/B Test Significance Calculator for Quick Results
Calculate A/B test statistical significance instantly. Get accurate p-values and conversion rates to make data-driven decisions for marketing and UX optimization.
Altman Z-Score Calculator - Predict Bankruptcy Risk Free
Calculate Altman Z-Score to predict bankruptcy risk within two years. Free financial calculator for credit risk assessment and financial distress analysis. Instant results.
Binomial Distribution Calculator - Free Probability Tool
Calculate binomial distribution probabilities instantly. Free online calculator for statistics, data science, and probability theory with step-by-step results.
Box Plot Calculator - Free Box and Whisker Plot Generator
Create box plots instantly with our free calculator. Visualize data distribution, quartiles, median, and outliers. Perfect for statistical analysis, data science, and research.
Confidence Interval to Standard Deviations Converter | Calculate Z-Scores
Convert confidence intervals (95%, 99%, 90%) to standard deviations and z-scores instantly. Free calculator for statistical analysis, hypothesis testing, and research data interpretation.
Critical Value Calculator | Z-test, t-test, Chi-Square
Find one-tailed and two-tailed critical values for the most widespread statistical tests, including Z-test, t-test, and Chi-squared test. Ideal for statistical hypothesis testing and research analysis.
Fisher's Exact Test Calculator - Free Statistical Tool
Calculate exact p-values for 2×2 contingency tables with Fisher's exact test. Perfect for small sample sizes when chi-square assumptions fail. Free online tool.
Gamma Distribution Calculator - Statistical Analysis Tool
Calculate gamma distribution properties with shape and scale parameters. Instant PDF, CDF, mean, variance, skewness, and kurtosis for statistical analysis.
Gender Pay Gap Calculator - Calculate Salary Disparity & Percentage
Free gender pay gap calculator instantly compares two salaries. Calculate dollar difference and percentage disparity for pay equity audits and negotiations.
Laplace Distribution Calculator - Free PDF & Visualization Tool
Free Laplace distribution calculator: compute PDF values, visualize double exponential distributions, and analyze probability with location & scale parameters. Perfect for data science and statistics.
Poisson Distribution Calculator - Calculate Event Probabilities
Free Poisson distribution calculator for instant probability calculations. Perfect for quality control, call center management, and scientific research. Calculate event probabilities based on average occurrence rates.
Raw Score Calculator - Convert Z-Score to Original Value
Free raw score calculator converts z-scores to original values instantly. Calculate raw scores from mean, standard deviation, and z-score for statistical analysis, test scores, and data interpretation.
Six Sigma Calculator - Free DPMO & Sigma Level Tool
Free Six Sigma calculator. Calculate sigma level, DPMO, and process yield instantly. Essential quality management tool for continuous improvement and defect reduction.
Standard Deviation Index Calculator | Free SDI Tool
Calculate Standard Deviation Index (SDI) instantly for quality control. Compare test results to control mean for labs, manufacturing & research. Free SDI calculator.
T-Test Calculator - Free Online Statistical Analysis Tool
Free t-test calculator for one-sample, two-sample, and paired t-tests. Calculate t-statistics, p-values, and degrees of freedom instantly. Perfect for hypothesis testing and statistical analysis.
Z-Score Calculator - Standard Score & Probability Tool
Free z-score calculator computes standard scores and cumulative probability instantly. Find how many standard deviations a data point is from the mean.
Z-Test Calculator - Free Statistical Significance Tool
Calculate z-scores instantly with our free z-test calculator. Perform hypothesis testing, interpret results, and visualize statistical significance. Perfect for students and researchers.