Calculate area for rectangles, squares, triangles, circles, and trapezoids.

Calculate mean, median, minimum, maximum, range, and count from a list of numbers.

Calculate circle area, circumference, and diameter from radius.

Convert a decimal number into a simplified fraction.

Calculate the distance between two coordinate points.

Calculate powers, squares, cubes, and exponent expressions.

Add, subtract, multiply, divide, and simplify fractions.

Convert a fraction into a decimal value.

Solve equations in the form ax + b = c and see the algebraic steps.

Enter any two values and solve for speed, distance, or time.

Solve total work, work rate, or time from the relationship work = rate × time.

Paste a list of numbers and instantly summarize count, mean, median, range, and standard deviation.

Find quartiles, IQR, outlier fences, and possible outliers from a numerical dataset.

Generate arithmetic or geometric sequences from a starting value and step or ratio.

Generate a reusable table showing a range of percentages of any base value.

Convert standard Roman numerals and whole numbers from 1 to 3,999.

Convert ordinary decimal numbers to scientific notation and scientific notation back to decimal form.

Plot a list of x,y coordinate points on an automatically scaled Cartesian plane.

See a fraction as filled parts of a whole and compare its decimal and percentage forms.

A compact reference for percent-of, what-percent, percentage change, and reverse-percentage formulas.

Quick formulas for speed, work rate, density, and other quantity-per-unit relationships.