Math Tools

Calculate the approximate BTU requirement for your air conditioner based on room size, region, and number of people.

Calculate the area for rectangles, squares, triangles, and circles on the same screen, based on your selected unit of measurement.

Quickly and accurately convert between number bases from 2 to 36.

Calculate the circumference of circles, triangles, rectangles, squares, trapezoids, regular polygons, and ellipses all in one place.

Calculate how many different unordered selections can be made when choosing r elements from n elements.

Find the most suitable option by comparing alternatives based on criteria weights and scores from 1 to 10.

Enter the base and exponent values to calculate the exponential number result, the corresponding negative exponent, and a summary of the operation.

Calculate the factorial value of the entered integer with exact results, digit count, and scientific notation.

Enter positive integers between 2 and 20 to calculate the GCD and LCM values.

Divide the total length according to the golden ratio or calculate the missing part and total from the short or long section.

Calculate the remainder, quotient, and division status for the operation a mod b.

Calculate the percentage of a number, the ratio between two numbers, percentage change, and the result of an increase or decrease by a percentage.

Calculate how many different arrangements can be made when selecting r elements from n elements in order.

Factor a positive integer into its prime factors; view the exponential representation, list of prime factors, and the number of divisors.

Generate unique or repeated random integers between your specified minimum and maximum values.

Calculate a specific ratio of a number, the total based on a known ratio, or the simplest ratio between two numbers.

Enter the root degree and the number inside the root to calculate the square root, cube root, or n-th root result.

Calculate the square meters (m²), square centimeters (cm²), square decimeters (dm²), and acres of a rectangular area; optionally exclude the number of covering pieces.

Calculate the sample and population standard deviation, variance, mean, and median of your number set.

Calculate the volume of a rectangular prism, cube, sphere, cylinder, cone, and square pyramid based on your selected unit of measurement.