Free online calculators

Calculate exact age from a date of birth to today or any comparison date, with years, months, days, and total days.

Calculate percent of a number, percentage share, and percentage increase or decrease for everyday math.

Calculate the days between two dates, plus approximate weeks, months, and years for planning and timelines.

Calculate body mass index from weight in kilograms and height in centimeters, with a general BMI category.

Estimate monthly loan payments, total paid, and total interest from loan amount, annual rate, and term.

Calculate compound interest and final amount from principal, annual rate, time, and compounding frequency.

Estimate how savings may grow from an initial balance, monthly deposits, annual interest rate, and time horizon.

Calculate sale price and savings after a discount.

Calculate weighted GPA from grade points and credits.

Count weekdays between two dates.