statscalculatoronline.com
Stats Calculator Online
Free statistics calculators with formulas, steps, and branded PDF reports you can cite
Stats Calculator Online is a free library of statistics and math calculators with step-by-step solutions, textbook formulas, APA write-ups, and free branded PDF reports that include your inputs, formulas applied, worked steps, and final results (plus Word/CSV). Hypothesis tests, descriptive statistics, probability, regression, algebra, finance, and more.
Popular calculators
Start with high-demand tools on Stats Calculator Online — each page includes similar calculator widgets and learning tidbits.
- One-Sample t-Test CalculatorTest a sample mean against a hypothesized value
- Mean, Median, Mode CalculatorCalculate arithmetic mean, median, and mode
- Normal Distribution CalculatorPDF, CDF, and quantiles of the normal
- Simple Linear Regression CalculatorFit y = a + bx with inference
- Chi-Square Independence CalculatorTest association in contingency tables
- Sample Size & Power CalculatorPlan sample size for desired power
Calculator categories
369+ working tools across 36 categories — hypothesis testing, descriptive statistics, probability, regression, math, finance, and more.
Descriptive Statistics
Central tendency, variability, shape, and relationships.
35 calculators
Hypothesis Testing
Parametric and non-parametric tests for means, proportions, and ranks.
44 calculators
Probability Distributions
PDF, CDF, and critical values for common distributions.
23 calculators
Confidence Intervals
Estimate population parameters with confidence intervals.
7 calculators
Regression Analysis
Model relationships and make predictions.
9 calculators
Multivariate Analysis
PCA, factor analysis, discriminant analysis, and CCA.
5 calculators
Survival Analysis
Time-to-event analysis with Kaplan-Meier, log-rank, and Cox models.
3 calculators
Chart Makers
Create clear statistical visualizations from your data.
30 calculators
Causal Inference
DiD, IV, RDD, and panel effects estimators.
6 calculators
Experimental Design
A/B tests, sample size, randomization, and factorial plans.
10 calculators
Credit Analysis
Vintage and portfolio performance analysis.
1 calculators
Grades & GPA
Course grades, finals, and grade point averages.
3 calculators
Random Generators
Coins, cards, PINs, names, and random number tools.
8 calculators
Text Counters
Character and word counting with frequency tables.
2 calculators
Percentages
Percent of, change, difference, increase/decrease, and conversions.
10 calculators
Discrete Mathematics
Factorials, combinations, permutations, Fibonacci, and Pascal’s triangle.
9 calculators
Algebra
Absolute values, roots, exponents, and quadratic equations.
16 calculators
Finance
Loans, interest, ROI, tips, taxes, and time value of money.
27 calculators
Plane Geometry
Circles, triangles, polygons, distance, midpoint, and slope.
13 calculators
Solid Geometry
Spheres, cylinders, cones, cubes, and prisms.
7 calculators
Unit Conversions
Temperature, length, weight, area, volume, speed, and more.
17 calculators
Physics
Force, energy, motion, waves, and ideal gas calculations.
13 calculators
Health
BMI, running pace, and heart-rate training zones.
5 calculators
Time & Dates
Age, date differences, duration math, and military time.
8 calculators
Trigonometry
Sine, cosine, tangent, and inverse trig functions.
2 calculators
Construction
Square footage, concrete volume, and paint estimates.
10 calculators
Technology
Aspect ratio and pixels-per-inch calculators.
3 calculators
Fractions
Add, subtract, multiply, divide, simplify, and convert fractions.
10 calculators
General Math
GCF, LCM, factors, primes, ratios, rounding, and place value.
15 calculators
Chemistry
Molecular weight and related helpers.
1 calculators
Games & Sports
Dice, lottery, passwords, odds, and sports stats.
6 calculators
Correlation
Pearson, Spearman, Kendall, and point-biserial association.
4 calculators
Reliability Analysis
Cronbach, Cohen kappa, and Fleiss kappa.
3 calculators
Cluster Analysis
Hierarchical and k-means clustering.
2 calculators
Measurement Systems
Gage R&R and related MSA tools.
1 calculators
Matrix Algebra
Determinants, transpose, add, and multiply matrices.
1 calculators