Finance

Simple Interest Calculator

Calculate simple interest on a principal amount for a given time period and rate.

Math

Fraction Calculator

Add, subtract, multiply and divide fractions. Get results in simplified form with step-by-

Everyday

Roman Numeral Converter

Convert between Roman numerals and Arabic numbers instantly. Supports values from 1 to 399

Math

Quadratic Equation Solver

Enter coefficients a, b, and c to solve a quadratic equation and calculate its real roots.

Math

Percentage Calculator

Easily calculate percentages — find X% of Y, percentage change, or what percent X is of Y.

Statistics

Standard Deviation Calculator

Calculate population and sample standard deviation, variance, and more for a dataset.

Construction

Volume Calculator

Calculate the volume of common 3D shapes: cube, sphere, cylinder, cone and rectangular pri

Statistics

Mean Median Mode Calculator

Calculate mean, median, mode, range and standard deviation for a set of numbers.

Construction

Area Calculator

Calculate the area of common shapes: rectangle, circle, triangle, trapezoid and more.

Math

Scientific Calculator

A fully functional scientific calculator with trigonometric, logarithmic, and advanced mat

Math

GCD and LCM Calculator

Calculate the Greatest Common Divisor (GCD) and Least Common Multiple (LCM) of two or more

Math

Prime Number Checker

Check if a number is prime and find all prime factors of any number instantly.

Everyday

Angle Converter

Convert angles between degrees, radians, gradians, and turns instantly.

Everyday

Logarithm Calculator

Calculate log base 10, natural log (ln), log base 2, and any custom base logarithm.

Everyday

Trigonometry Calculator

Calculate sin, cos, tan, asin, acos, atan and all trig values for any angle in degrees or

Everyday

Perimeter Calculator

Calculate the perimeter of common shapes: square, rectangle, triangle, circle, and more.

Everyday

Matrix Calculator

Add, subtract, multiply 2×2 and 3×3 matrices and calculate the determinant instantly.

Everyday

Pythagorean Theorem Calculator

Calculate the hypotenuse or any missing side of a right triangle using the Pythagorean the

Everyday

Permutation and Combination Calculator

Calculate nPr (permutations) and nCr (combinations) for any values of n and r.

Everyday

Statistical Probability Calculator

Calculate basic probability, complement, union and intersection of events from given outco

Everyday

Exponent Calculator

Calculate exponents, powers, and roots. Supports any base and exponent including fractions

Everyday

Coordinate Distance Calculator

Calculate the distance between two points on a 2D or 3D coordinate plane using the distanc

Everyday

Significant Figures Calculator

Round any number to a specified number of significant figures and identify sig figs in any