SILDIL - Free Online Calculators for Finance, Math, Health & More

Calculate z-scores, standard scores, percentiles, probabilities, and Z-table values using the standard normal distribution with step-by-step calculations.

Math Calculators

Z-Score Calculator

Calculate 90%, 95%, and 99% confidence intervals for means, proportions, differences, and variances with critical values, margin of error, and calculation steps.

Math Calculators

Confidence Interval Calculator

Calculate effect size including Cohen's d, Hedges' g, Glass's Δ, effect-size r, η², Cohen's f, CLES, and binary effect measures from raw or summary data.

Math Calculators

Effect Size Calculator

Calculate the Wilcoxon signed-rank test for paired samples with signed ranks, W statistic, exact or normal-approximation p-value, z statistic, effect size, and detailed calculation steps.

Math Calculators

Wilcoxon Signed-Rank Test Calculator

Calculate one-sample, two-sample Student's t, Welch's, and paired t-tests from raw data or summary statistics. Get t statistic, degrees of freedom, p-value, critical t, confidence interval, and Cohen's d.

Math Calculators

T-Test Calculator

Calculate Student's t-distribution PDF, CDF, tail probabilities, critical t values, quantiles, and t-table values for any degrees of freedom. Not a t-test.

Math Calculators

Student's t-Distribution Calculator

Calculate the Pearson chi-square test of homogeneity for comparing categorical distributions across independent groups. Get χ², df, p-value, critical value, Cramér's V, Phi (2×2), expected counts, standardized residuals, and step-by-step results.

Math Calculators

Chi-Square Test of Homogeneity Calculator

Calculate the Pearson chi-square test of independence for an r×c contingency table. Get χ², df, p-value, critical value, Cramér's V, Phi (2×2), expected counts, standardized residuals, and step-by-step results.

Math Calculators

Chi-Square Test of Independence Calculator

Run a Pearson chi-square goodness-of-fit test from observed counts and expected frequencies or proportions. Get χ², df, p-value, critical value, contribution table, and step-by-step results.

Math Calculators

Chi-Square Goodness-of-Fit Calculator

Free chi-square calculator. Enter χ² and df for an upper-tail p-value, or df and α for a critical value. Includes a χ² distribution chart, a chi-square table calculator, and a Σ (O − E)²/E contribution calculator.

Math Calculators

Chi-Square Calculator

Free two-way ANOVA calculator for two-factor experiments. Analyze main effects, interaction, ANOVA tables, F-tests, p-values, effect sizes, post-hoc comparisons, simple effects, and assumptions.

Math Calculators

Two-Way ANOVA Calculator

Calculate one-way ANOVA from raw data or summary statistics. Get the full ANOVA table, F statistic, p-value, eta squared and omega squared, Tukey HSD or Games-Howell post-hoc, and Welch ANOVA when variances differ.

Math Calculators

One-Way ANOVA Calculator

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