Statistics Calculators
Essential statistical calculation tools for researchers and analysts. Calculate standard deviation, p-values, sample sizes, correlations, run A/B tests, and analyze your data effectively.
P-Value Calculator
Calculate p-values for hypothesis testing. Supports Z-test, T-test, and Chi-square test with one-tailed and two-tailed options.
Sample Size Calculator
Calculate the required sample size for surveys and statistical studies. Determine how many responses you need for reliable results.
Standard Deviation Calculator
Calculate standard deviation, variance, mean, median, mode, and other descriptive statistics from your dataset.
Coin Flip Simulator
Simulate coin flips and visualize the distribution of heads and tails. Learn about probability and the law of large numbers.
Dice Probability Calculator
Calculate the probability of rolling specific sums with multiple dice. Visualize dice roll distributions for D4, D6, D8, D10, D12, D20, and D100.
Random Number Generator (Distributions)
Generate random numbers with different probability distributions. Supports uniform, normal (Gaussian), and exponential distributions with visualization.
Correlation Coefficient Calculator
Calculate Pearson correlation coefficient (r), R-squared, and linear regression. Visualize relationships with scatter plots.
A/B Test Significance Calculator
Calculate statistical significance for A/B test results. Determine if your conversion rate improvements are real or due to chance.