Online Calculators

Calculate population and sample standard deviation instantly to measure data variability and dispersion accurately.

Identify, analyze, and generate number sequences such as arithmetic and geometric progressions easily.

Determine the required sample size for surveys and experiments based on confidence level and margin of error.

Calculate probabilities of events easily using basic probability rules and formulas.

tools Perform comprehensive statistical calculations including mean, variance, standard deviation, and more in one place.

Quickly calculate mean, median, mode, and range to summarize and understand datasets.

Calculate permutations and combinations to solve counting and probability problems accurately.

Calculate Z-scores to understand how far a data point is from the mean in standard deviations.

Calculate confidence intervals for population means with given confidence levels and standard deviation.

Calculate linear, quadratic, exponential, and polynomial regression equations from data points with correlation coefficient.

Calculate Pearson, Spearman, and Kendall correlation coefficients between two variables with p-values and significance levels.

Calculate Chi-Square statistic, degrees of freedom, and p-value for goodness of fit and independence tests.

Calculate one-sample, two-sample (independent), and paired t-test statistics with p-values and confidence intervals.

Calculate one-way and two-way ANOVA to compare means across multiple groups with F-statistic and p-value.

Calculate quartiles (Q1, Q2, Q3), interquartile range, and percentile ranks for any dataset.

Calculate interquartile range (IQR), quartiles, and identify data spread between Q1 and Q3.

Detect outliers in datasets using IQR method (1.5×IQR rule) and Z-score method (standard deviations).

Generate box plots (box-and-whisker plots) with five-number summary: min, Q1, median, Q3, max.

Generate histograms to visualize frequency distribution of continuous data with custom bin sizes.

Calculate normal distribution probabilities, Z-scores, percentiles, and values for given probabilities.

Calculate binomial probabilities, cumulative probabilities, mean, variance, and standard deviation.

Calculate Poisson probabilities, cumulative probabilities, mean, variance, and rate parameter λ.

Calculate sample variance and population variance with step-by-step explanation of the formula.

Calculate coefficient of variation (CV) as percentage to compare relative variability across datasets.

Calculate standard error of the mean (SEM) from standard deviation and sample size.

Calculate margin of error, confidence interval, and required sample size for surveys and polls.

Calculate p-value from Z-score, t-statistic, F-statistic, chi-square statistic, or correlation coefficient.