Calculators

Do the math instantly, right in your browser — nothing you enter is ever uploaded.

• Percentage CalculatorFind X% of a number, calculate percentage change, or work out what percent one number is of another.
• Fraction CalculatorSimplify a fraction or add, subtract, multiply, and divide two fractions, with the steps shown.
• Scientific CalculatorEvaluate math expressions with trig functions, logarithms, exponents, and parentheses — free online.
• Unit ConverterConvert length, weight, temperature, volume, area, and speed between metric and imperial units.
• GPA CalculatorCalculate your grade point average from a list of courses, grades, and credit hours.
• Average (Mean) CalculatorCalculate the mean, sum, count, and range of a list of numbers, instantly in your browser.
• Median CalculatorFind the middle value of a list of numbers — the median, unaffected by outliers.
• Standard Deviation CalculatorCalculate sample and population standard deviation and variance for a set of numbers.
• Ratio CalculatorSimplify a ratio to its lowest terms, or scale it up to match a target value.
• Prime Number CheckerCheck whether a number is prime, and see its smallest factor if it isn't.
• Factorial CalculatorCalculate N! (N factorial) — the product of every whole number from 1 up to N.
• LCM / GCD CalculatorFind the least common multiple and greatest common divisor of two or more numbers.
• Quadratic Equation SolverSolve ax² + bx + c = 0 for x, including complex roots when the discriminant is negative.
• Random Number GeneratorGenerate random whole numbers in a range, with or without repeats, using cryptographic randomness.
• Number Base ConverterConvert numbers between binary, octal, decimal, hexadecimal, or any base from 2 to 36.
• Triangle CalculatorCalculate a triangle's area, perimeter, and all three angles from its three side lengths.
• Circle CalculatorCalculate a circle's radius, diameter, circumference, and area from any one known value.
• Slope & Distance CalculatorCalculate the slope, distance, and midpoint between two points on a coordinate plane.
• EMI CalculatorCalculate the monthly EMI on a loan from its principal, interest rate, and term in months.
• VAT CalculatorAdd VAT to a net price or remove it from a VAT-inclusive price, at any rate.
• GST CalculatorAdd GST to a price or remove it from a GST-inclusive price, at any rate.
• Loan CalculatorCalculate a loan's monthly payment, total interest, and total cost from its term in years.
• Currency ConverterConvert between 20 major currencies using live, daily-updated exchange rates.
• Compound Interest CalculatorCalculate the future value of an investment with interest compounding daily to annually.