Math

Everyday mathematics calculators: percentages, ratios, averages and networking tools.

• Percentage CalculatorCalculate percentages three ways: find X% of a number, find what percent one number is of another, or find percentage change.
• Percent Change CalculatorCalculate the percentage increase or decrease between two values.
• Percentage Increase CalculatorCalculate the percentage increase from an original value to a new, larger value.
• Gratuity CalculatorCalculate a tip or gratuity amount as a percentage of a bill.
• Percentage Decrease CalculatorCalculate the percentage decrease from an original value to a new, smaller value.
• Tip CalculatorCalculate a tip amount as a percentage of a bill.
• Scientific CalculatorA full-featured online scientific calculator with trigonometric, logarithmic and exponential functions, keyboard support included.
• Subnet CalculatorCalculate the network address, broadcast address, usable host range and host count for an IPv4 CIDR subnet.
• Exponent CalculatorCalculate a base number raised to any exponent.
• Square Root CalculatorCalculate the square root of any non-negative number.
• Cube Root CalculatorCalculate the cube root of any number, including negative numbers.
• Log CalculatorCalculate the logarithm of a number for any base.
• Factorial CalculatorCalculate the factorial of a non-negative whole number.
• GCD CalculatorCalculate the greatest common divisor (GCD) of two numbers.
• LCM CalculatorCalculate the least common multiple (LCM) of two numbers.
• Prime Number CalculatorCheck whether a number is prime.
• Modulo CalculatorCalculate the remainder when dividing one number by another.
• Fraction CalculatorAdd, subtract, multiply or divide two fractions and get the simplified result.
• Decimal to Fraction CalculatorConvert a decimal number into a simplified fraction.
• Fraction to Decimal CalculatorConvert a fraction into its decimal equivalent.
• Ratio CalculatorSimplify a ratio to its lowest terms.
• Proportion CalculatorSolve for a missing value in a proportion (a/b = c/d).
• Average CalculatorCalculate the average (mean) of a list of numbers.
• Mean Median Mode CalculatorCalculate the mean, median and mode of a list of numbers.
• Standard Deviation CalculatorCalculate the standard deviation and variance of a list of numbers.
• Statistics CalculatorCalculate mean, median, mode, range, variance and standard deviation for a list of numbers.
• Permutation CalculatorCalculate the number of ways to arrange r items from a set of n, where order matters.
• Combination CalculatorCalculate the number of ways to choose r items from a set of n, where order doesn't matter.
• Probability CalculatorCalculate the probability of an event given favorable and total outcomes.
• Algebra CalculatorSolve a linear equation of the form ax + b = 0.
• Quadratic Equation CalculatorSolve a quadratic equation of the form ax² + bx + c = 0.
• Pythagorean Theorem CalculatorFind a right triangle's hypotenuse or a missing leg using the Pythagorean theorem.
• Right Triangle CalculatorCalculate a missing side of a right triangle given the other two.
• Triangle CalculatorCalculate a triangle's angles, area and perimeter from its three side lengths.
• Circle CalculatorCalculate a circle's area, circumference and diameter from its radius.
• Area CalculatorCalculate the area of a square, rectangle, triangle or circle.
• Volume CalculatorCalculate the volume of a cube, sphere, cylinder or cone.
• Surface Area CalculatorCalculate the surface area of a cube, sphere or cylinder.
• Ohm's Law CalculatorCalculate voltage using Ohm's Law: V = I × R.
• Voltage CalculatorCalculate voltage from current and resistance using Ohm's Law.
• Current CalculatorCalculate electrical current from voltage and resistance using Ohm's Law.
• Resistance CalculatorCalculate electrical resistance from voltage and current using Ohm's Law.
• Electrical Power CalculatorCalculate electrical power from voltage and current.
• Scientific Notation CalculatorConvert a number to scientific notation, or scientific notation back to a regular number.
• Number Base ConverterConvert numbers between binary, octal, decimal, hexadecimal and any base from 2 to 36.