From quick percentages to scientific expressions — solve it in seconds.
The three most common percentage questions, answered instantly.
Type any expression using sin, cos, tan, log, ln, sqrt, ^, pi, e — evaluated safely.
Enter two fractions and pick an operator — get the simplified result.
Solve linear equations of the form ax + b = c for x.
Solve any quadratic ax² + bx + c = 0 using the quadratic formula.
Enter a list of numbers to compute the average, sum and count.
Compute the percentage change between two numbers.
Simplify a ratio to its lowest terms and solve simple proportions.
Convert between decimal, fraction and percent forms and round to a chosen precision.
Enter three side lengths to compute area, perimeter and interior angles.
Compute the area of common shapes: rectangle, circle or right triangle.