Free Online Calculators
From BMI to loans, tips to age — instant calculations at your fingertips.
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View all →Net Present Value (NPV) Calculator
#1Calculate the Net Present Value of an investment based on initial investment, annual cash flow, discount rate, and number of years.
Battery Life Calculator
Estimates how many hours a battery will last based on battery capacity and device current draw.
Home Affordability Calculator
Estimates the maximum home price a person can afford based on income, debt, and interest rate.
2D Euclidean Distance Calculator
Calculate the straight-line (Euclidean) distance between two points in a 2D coordinate plane.
Final Exam Grade Calculator
Calculate your overall course grade after including your final exam score.
Population Density Calculator
Calculate the population density of a region based on total population and total land area.