Tools
Calculate the area, circumference and diameter of a circle from its radius, directly in your browser.
Calculate the discounted price and how much you save, directly in your browser.
Calculate the straight-line distance between two coordinate points, directly in your browser.
Calculate a base raised to an exponent (base^exponent), directly in your browser.
Calculate the greatest common factor of two whole numbers, directly in your browser.
Calculate the remaining quantity of a substance after a given time, based on its half-life, directly in your browser.
Calculate the least common multiple of two whole numbers, directly in your browser.
Calculate the logarithm of a number to any base, directly in your browser.
Calculate the percent error between an observed and a true value, directly in your browser.
Break a whole number down into its prime factors, directly in your browser.