📐 Mathematics

Math Calculators

From everyday arithmetic to advanced statistics and hypothesis testing. All tools run instantly in your browser with no installation or sign-up required.

🔢 Calculators

🔢 Arithmetic

Basic Calculator

Full-featured arithmetic calculator with keyboard support, calculation history and percentage function.

Keyboard support • History

Percentage Calculator

Calculate any type of percentage: what is X% of Y, X is what % of Y, percentage change and more.

Multiple types • Change • Difference

Pythagorean Theorem

Find any side of a right triangle given the other two. Shows the formula and step-by-step working.

Find any side • Step-by-step

📊 Statistics

Statistics Calculator

Paste your data for mean, median, mode, standard deviation, variance, quartiles, IQR and a histogram.

Paste data • Full report • Histogram

Chi-Square Test

Pearson chi-square goodness-of-fit test. Enter observed and expected frequencies to get χ², p-value and interpretation.

χ², p-value, degrees of freedom

🎲 Random & Utility

Roll any number of dice (D4, D6, D8, D10, D12, D20, D100). Animated roll with history and statistics.

D4 to D100 • Multi-dice • History

Random Number Generator

Generate one or multiple random numbers in any range. Options for unique values and integer-only results.

Any range • Multiple numbers • Unique

Password Generator

Generate strong, secure passwords with custom length, uppercase, numbers and symbols. Copy in one click.

Custom options • Strength meter • Copy