Math Calculators

Generate random integers from 1 to 10 or custom ranges, run batch draws, and review frequency stats for games, lessons, experiments, and quick decisions.

Calculate z-scores and convert between z-scores, percentiles, and probabilities using the standard normal distribution. Essential for statistics homework, hypothesis testing, and data analysis.

Calculate confidence interval bounds for sample means using z critical values, standard error, and margin of error for clearer statistical decisions.

Calculate mean (average), median (middle value), and mode (most frequent) for any data set. Input numbers separated by commas or spaces. Get instant results with step-by-step explanations, range, sum, and count. Handles decimals, negative numbers, and outliers. Perfect for statistics, data analysis, and homework in 2025.

Calculate percentages, percentage increase/decrease, percentage of a number, and percentage difference with multiple calculation modes. Solve "X is what percent of Y", "what is X% of Y", "X is Y% of what number", percentage change over time, and reverse percentage problems for math, finance, grades, discounts, and data analysis in 2025.

Free online Scientific Calculator with advanced features including trigonometry, logarithms, exponentials, and history tape. Solves complex math problems instantly.

Calculate sample or population variance from any dataset with this free variance calculator, including mean, standard deviation, and step-by-step stats context.

Solve fraction math fast with this free fraction calculator. Add, subtract, multiply, or divide fractions and see simplified, decimal, and mixed-number results.

Balance equations instantly with this chemical equation balancer. Parse formulas, compute stoichiometric coefficients, and verify atom counts for chemistry homework and lab prep.