Math Calculators
Free math calculators for percentages, fractions, ratios, averages, standard deviation, GPA, and margins.
87 free tools available
Browse in-depth math calculators guides
Absolute Value Calculator
Find the absolute value of any real number.
Age Calculator
Calculate exact age in years, months, and days from birth date.
Average Calculator
Calculate mean, median, and sum from a list of numbers.
Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal.
Binomial Probability Calculator
Calculate the probability of exactly k successes in n independent trials.
Break Even Calculator
Find the number of units you need to sell to cover fixed and variable costs.
Chi-Square Calculator
Calculate chi-square statistic and p-value for contingency tables.
Circle Calculator
Calculate area, circumference, diameter, and radius of a circle.
Combination Calculator
Calculate combinations nCr for counting and statistics.
Combination with Repetition Calculator
Calculate combinations where items can be chosen more than once.
Complex Number Calculator
Add, subtract, multiply, or divide two complex numbers.
Confidence Interval Calculator
Calculate confidence intervals for sample means and proportions.
Correlation Calculator
Calculate Pearson correlation coefficient between two datasets.
Cube Root Calculator
Calculate the cube root of any number.
Discount Calculator
Calculate discounted price, amount saved, and final price after applying a percentage discount.
Distance Calculator
Calculate the distance between two points in 2D space.
Expected Value Calculator
Calculate expected value from a list of outcomes and their probabilities.
Factorial Calculator
Calculate factorial n! for positive integers.
Factorial with Steps Calculator
Calculate factorial n! and see the step-by-step multiplication.
Fraction Calculator
Add, subtract, multiply, and divide fractions.
Fraction Simplifier
Reduce a fraction to its simplest form using the greatest common divisor.
Geometric Mean Calculator
Calculate the geometric mean of a set of positive numbers.
GPA Calculator
Calculate weighted GPA from course grades and credits.
GST Calculator
Calculate GST amount, net price, and gross price for any GST rate.
Harmonic Mean Calculator
Calculate the harmonic mean of a set of positive numbers.
Hex to RGB Converter
Convert hex color codes to RGB values.
Logarithm Calculator
Calculate natural log, base-10 log, and log base 2 for any positive number.
Margin Calculator
Calculate profit margin, markup, and cost from price.
Markup Calculator
Calculate selling price, markup percentage, and profit from cost and desired markup.
Matrix Addition Calculator
Add two 2x2 matrices element by element.
Midpoint Calculator
Find the midpoint between two points in 2D coordinates.
Mixed Number Calculator
Convert an improper fraction to a mixed number.
Modulo Calculator
Calculate the remainder of division using the modulo operator.
Normal Distribution Calculator
Calculate the probability density for a given value in a normal distribution.
P-Value Calculator
Calculate p-value from test statistic for hypothesis testing.
Percentage Calculator
Calculate percentage increase, decrease, and what percentage one number is of another.
Percentage Decrease Calculator
Calculate the percentage decrease between an original value and a new value.
Percentage Difference Calculator
Calculate the percentage difference between two values.
Percentage Increase Calculator
Calculate the percentage increase between an original value and a new value.
Permutation Calculator
Calculate permutations nPr for counting and probability.
Permutation with Repetition Calculator
Calculate the number of arrangements when repetition is allowed.
Poisson Distribution Calculator
Calculate Poisson probability for a given average rate and number of occurrences.
Polynomial Roots Calculator
Find the real roots of a quadratic equation ax² + bx + c = 0.
Probability Calculator
Calculate probability of events for independent and conditional cases.
Proportion Calculator
Solve for the unknown value in a proportion equation A/B = C/D.
Pythagorean Theorem Calculator
Find the missing side of a right triangle using the Pythagorean theorem.
Quadratic Equation Solver
Solve ax² + bx + c = 0 and find roots, vertex, and discriminant.
Ratio Calculator
Simplify ratios and find missing values in proportions.
Ratio Simplifier
Simplify a ratio of two numbers to its smallest whole-number form.
RGB to Hex Converter
Convert RGB color values to hex color codes.
Roman Numerals Converter
Convert numbers to and from Roman numerals.
Root Mean Square Calculator
Calculate the RMS of a list of numbers from comma-separated values.
Sales Tax Calculator
Calculate sales tax and total price for any state or local tax rate.
Scientific Notation Converter
Convert numbers to and from scientific notation.
Significant Figures Calculator
Count significant figures in a number and round to a desired number of sig figs.
Slope Calculator
Calculate the slope between two points and find the line equation.
Standard Deviation Calculator
Calculate standard deviation and variance from a dataset.
Standard Error Calculator
Calculate standard error of the mean from sample data.
Standard Form Calculator
Convert any number into standard form (scientific notation) a × 10ⁿ.
Surface Area Calculator
Calculate surface area for cube, sphere, cylinder, and cone.
Triangle Calculator
Calculate area, perimeter, and angles of a triangle from base and height or sides.
Unit Price Calculator
Compare prices per unit to find the best deal.
Australia VAT Calculator
Calculate Australia VAT amount, net price, and gross price at the standard rate of 10%.
Belgium VAT Calculator
Calculate Belgium VAT amount, net price, and gross price at the standard rate of 21%.
Brazil VAT Calculator
Calculate Brazil VAT amount, net price, and gross price at the standard rate of 17%.
Canada VAT Calculator
Calculate Canada VAT amount, net price, and gross price at the standard rate of 13%.
Denmark VAT Calculator
Calculate Denmark VAT amount, net price, and gross price at the standard rate of 25%.
France VAT Calculator
Calculate France VAT amount, net price, and gross price at the standard rate of 20%.
Germany VAT Calculator
Calculate Germany VAT amount, net price, and gross price at the standard rate of 19%.
India VAT Calculator
Calculate India VAT amount, net price, and gross price at the standard rate of 18%.
Ireland VAT Calculator
Calculate Ireland VAT amount, net price, and gross price at the standard rate of 23%.
Italy VAT Calculator
Calculate Italy VAT amount, net price, and gross price at the standard rate of 22%.
Japan VAT Calculator
Calculate Japan VAT amount, net price, and gross price at the standard rate of 10%.
Mexico VAT Calculator
Calculate Mexico VAT amount, net price, and gross price at the standard rate of 16%.
Netherlands VAT Calculator
Calculate Netherlands VAT amount, net price, and gross price at the standard rate of 21%.
Norway VAT Calculator
Calculate Norway VAT amount, net price, and gross price at the standard rate of 25%.
Singapore VAT Calculator
Calculate Singapore VAT amount, net price, and gross price at the standard rate of 9%.
South Korea VAT Calculator
Calculate South Korea VAT amount, net price, and gross price at the standard rate of 10%.
Spain VAT Calculator
Calculate Spain VAT amount, net price, and gross price at the standard rate of 21%.
Sweden VAT Calculator
Calculate Sweden VAT amount, net price, and gross price at the standard rate of 25%.
Switzerland VAT Calculator
Calculate Switzerland VAT amount, net price, and gross price at the standard rate of 8.1%.
United Kingdom VAT Calculator
Calculate United Kingdom VAT amount, net price, and gross price at the standard rate of 20%.
VAT Calculator
Calculate VAT amount, gross price, and net price for any VAT rate.
Vector Magnitude Calculator
Calculate the magnitude of a vector in 2D or 3D space.
Volume Calculator
Calculate volume for common shapes: cube, sphere, cylinder, and cone.
Weighted Average Calculator
Calculate weighted average from values and their weights.
Z-Score Calculator
Calculate z-score and compare to standard normal distribution.