About Our Everyday Calculators
This category covers the calculators people reach for constantly in daily life — figuring out someone's exact age, counting days until an event, splitting a restaurant bill, calculating GPA, or converting units. They're built to be fast and simple: enter your numbers, get your answer, move on.
Date & Time Tools
The age calculator gives your exact age broken down to years, months, days, and even total hours and minutes lived. The date calculator handles both date arithmetic (add/subtract time from a date) and date differences (days between two dates) — two of the most commonly searched calculator functions on the web.
Education Tools
The GPA calculator converts letter grades and credit hours to a 4.0 scale GPA, supporting both single-semester and cumulative calculations. The grade calculator handles weighted categories — perfect for courses where homework, quizzes, and exams count differently toward your final grade.
Conversions & Generators
Our unit converters cover length, weight, temperature, volume, speed, and data storage — all using precise conversion factors. The random number generator, password generator, and dice roller use cryptographically sound randomization where appropriate (password generator uses the Web Crypto API for secure random character selection).
How accurate is the age calculator with leap years?
The age calculator correctly accounts for leap years by using actual calendar date arithmetic (via JavaScript's Date object), not simple day-counting approximations. This means someone born on February 29 gets correctly calculated ages even in non-leap years.
Is the password generator secure?
Yes. The password generator uses the Web Crypto API's cryptographically secure random number generator (crypto.getRandomValues), not Math.random(), which is not suitable for security purposes. Generated passwords are never transmitted or stored anywhere.