Other Calculators.

12 free everyday calculators for work, school, and life.

Calculate your exact age in years, months, days, hours, and minutes.

Find the difference between two dates or add/subtract days from a date.

Add or subtract time values in hours, minutes, and seconds.

Calculate total hours worked in a day or week from time-in and time-out.

Calculate your GPA for semester or cumulative grades on a 4.0 scale.

Calculate your final grade from weighted assignments, quizzes, and exams.

Calculate how many bags of concrete you need for slabs, footers, and columns.

Calculate network address, broadcast address, and host range from IP and CIDR.

Generate strong, random passwords with custom length and character sets.

Convert between units of length, weight, temperature, volume, area, and more.

Calculate your dog's age in human years based on size and birth date.

Convert between 150+ global currencies with live, daily-updated exchange rates.