Statistics Tools – Small Tools. Big Help.

Welcome to SmallToolsOnline.com — your go-to toolkit for working with numbers, data, and statistics quickly and efficiently. Our collection of smart browser-based statistics tools helps you analyze, calculate, and visualize data instantly — all without installing any software or uploading your files anywhere.

From simple mean, median, and mode calculators to advanced data visualizers, probability finders, and standard deviation calculators, every tool runs directly in your browser using fast JavaScript processing.

Whether you're a student learning statistics, a researcher analyzing data, or a developer needing quick calculations — Small Tools Online helps you do it faster, smarter, and safer.

All Statistics Tools

µ σ
Descriptive Statistics
Compute mean, median, mode, variance and standard deviation.
t
One-Sample t-Test
Test whether the mean of a single sample differs from a known value.
t
Two-Sample t-Test
Compare means of two independent samples.
Paired t-Test
Compare means from the same group at two times.
ANOVA (One-Way)
Test differences among three or more group means.
χ²
Chi-Square Test
Test for association between categorical variables.
Correlation Coefficient
Compute Pearson or Spearman correlation between two variables.
Linear Regression
Fit a linear model to predict a dependent variable by an independent one.
Multiple Regression
Fit a model with multiple predictors.
Logistic Regression
Model binary outcomes using logistic regression.
n &power;
Power & Sample Size Calculator
Estimate sample size or power for a given effect size and significance.
CI
Confidence Interval Calculator
Compute confidence intervals for means or proportions.
Histogram Generator
Create a histogram from numeric data in your browser.
Boxplot Generator
Generate box-and-whisker plots from your data set.
80/20
Pareto Chart
Create an 80/20 Pareto chart from categorical data.
Scatter Plot Generator
Plot data points and fit a trend line in your browser.
Regression Residual Plot
Visualize residuals from regression for diagnostics.
Confidence Ellipse Plot
Plot the confidence ellipse for a bivariate distribution.
MC
Monte Carlo Simulation
Run simple browser-based Monte Carlo simulations.
Time-Series Plot Generator
Plot time series data and view trends over time.
Normal Distribution Calculator
Calculate probabilities and z-scores for normal distributions.
Binomial Probability Calculator
Compute binomial probabilities and cumulative values.
Poisson Distribution Calculator
Find Poisson probabilities for discrete random events.
Uniform Distribution Calculator
Compute probabilities for uniform distributions.
Exponential Distribution Calculator
Find probabilities for exponential random variables.
p̂
Confidence Interval for Proportion
Calculate CI for population proportions.
μ
Confidence Interval for Mean
Find confidence interval for population mean.
Random Number Generator
Generate random numbers between chosen limits.
Random Sampling Tool
Randomly select elements from your data list.
%
Percentile Calculator
Find percentile rank or value for data sets.
Z
Z-Score Calculator
Compute z-scores and probabilities for data points.
Quartile Calculator
Find Q1, Q2, Q3, and the interquartile range.
σ
Standard Deviation Calculator
Calculate population or sample standard deviation.
Variance Calculator
Compute variance of population or sample data.
x̄ M M
Mean Median Mode Calculator
Find the mean, median, and mode of a dataset.
Covariance Calculator
Find the covariance between two variables.
Probability Density Function Plotter
Visualize PDFs of normal and other distributions.
Cumulative Distribution Function Plotter
Plot CDFs of common statistical distributions.
P(A)
Probability Calculator
Compute simple, joint, and conditional probabilities.
nCr
Combinations & Permutations Calculator
Calculate factorial-based combinations and permutations.
Probability Tree Diagram Maker
Visualize probability paths and outcomes with branching trees.
Correlation Matrix Generator
Create a correlation matrix for multiple numeric variables.
Outlier Detection Tool
Identify statistical outliers in your dataset.
Data Normality Test
Perform a Shapiro–Wilk normality test in your browser.
Correlation Heatmap Generator
Visualize correlation strengths in a colorful heatmap.
Moving Average Calculator
Smooth time-series data using moving averages.
w̄
Weighted Average Calculator
Calculate a weighted mean from values and weights.
Correlation Scatter Plot
Visualize correlation between two continuous variables.
σ²w
Weighted Variance Calculator
Compute variance when data points have different weights.
Descriptive Summary Dashboard
View quick descriptive statistics summary from your dataset.