Math Calculators
Algebra, geometry, statistics, and number calculators
Solve common algebra, geometry, conversion, grade, and number problems. Use search to find the right formula quickly, then review the method behind every answer.
Percentage Calculator
Find what percentage one number is of another.
Open calculator →Quadratic Equation Solver
Solve equations in the form ax² + bx + c = 0.
Open calculator →Pythagorean Theorem
Calculate a right triangle hypotenuse.
Open calculator →Circle Calculator
Calculate circumference and area from radius.
Open calculator →Triangle Area
Calculate area from base and height.
Open calculator →Length Unit Converter
Convert between common length units.
Open calculator →Average Calculator
Calculate the mean of multiple values.
Open calculator →Fraction to Decimal
Convert a fraction into decimal form.
Open calculator →Exponent Calculator
Raise a base to a selected power.
Open calculator →GCD & LCM Calculator
Find greatest common divisor and least common multiple.
Open calculator →Test Grade Calculator
Calculate a score from correct and total questions.
Open calculator →Circumference Calculator
Calculate circle circumference from radius.
Open calculator →90 Day Calculator
Add 90 days to a starting date.
Open calculator →30 Day Calculator
Add 30 days to a starting date.
Open calculator →Age Calculator
Calculate age in years, months, and days.
Open calculator →GPA Calculator
Calculate grade-point average with credit hours.
Open calculator →Kilograms to Pounds
Convert kilograms and pounds in either direction.
Open calculator →Centimetres to Inches
Convert centimetres to inches and feet.
Open calculator →Temperature Converter
Convert Celsius, Fahrenheit, and Kelvin.
Open calculator →Miles to Kilometres
Convert miles and kilometres.
Open calculator →Feet to Metres
Convert feet and metres.
Open calculator →Can’t find the right formula?
Browse all calculator categories.
Explore every tool by subject and open its complete guide.