Stats Calculator Online
Regression Analysis Calculators
Model relationships and make predictions. Free tools on Stats Calculator Online with formulas, how-to steps, similar calculator widgets, tidbits, and exportable reports.
- Simple Linear Regression CalculatorFit y = a + bx with inference
- Multiple Linear Regression CalculatorMultiple predictors OLS
- Quadratic Regression CalculatorFit a + bx + cx^2
- Exponential Regression CalculatorFit A e^{bx}
- Logistic Regression CalculatorBinary outcome logistic model
- Polynomial Regression CalculatorHigher-order polynomial fit
- Censored Regression (Tobit) CalculatorTobit-style censored outcome model
- Variance Inflation Factor CalculatorVIF multicollinearity diagnostics
- Regression Slope Test Calculatort-test and CI for the slope
Tidbits from Stats Calculator Online
Quick tip
Sample vs population SD
Use n−1 (sample) when your data are a subset of a larger group; use n when you truly have the whole population.
Open SD calculator →Tidbit
A p-value is not the probability H₀ is true
It is the probability of data at least as extreme as yours if H₀ were true. Pair it with an effect size and confidence interval.
P-value calculator →Need a path?
Not sure which test to run?
Start with the statistical test selector, then open the matching calculator with formulas and APA export.
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Cross-topic picks from Stats Calculator Online
- One-Sample t-Test CalculatorHypothesis Testing · Test a sample mean against a hypothesized value
- Mean, Median, Mode CalculatorDescriptive Statistics · Calculate arithmetic mean, median, and mode
- Normal Distribution CalculatorProbability Distributions · PDF, CDF, and quantiles of the normal
- Chi-Square Independence CalculatorHypothesis Testing · Test association in contingency tables
- Sample Size & Power CalculatorHypothesis Testing · Plan sample size for desired power