ROI Calculator
Calculate return on investment, net gain or loss, and annualized ROI percentage.
Calculate return on investment, net gain or loss, and annualized ROI percentage.
Solve quadratic equations with the quadratic formula. Find roots, discriminant, and vertex.
Calculate how long to reach your savings goal with monthly contributions and interest.
Estimate ideal body weight using Robinson, Miller, Devine, and Hamwi formulas.
Count exact days until any future date, or days since a past date.
Add tax to a price, reverse-calculate pre-tax from a total, or find the tax rate.
Calculate mean, median, mode, standard deviation, and more from any data set.
Calculate powers, roots, squares, cubes and nth roots — the E in GEMS.
Estimate body fat percentage using the U.S. Navy circumference method.
Calculate your GPA on a 4.0 scale with multiple courses and credit hours.