Everyday calculators guide

Why make a calculator hub?

Most calculator pages solve one job, but daily planning often needs several related calculations. You may calculate a date, check the hours involved, then work out a percentage or grade. A hub keeps those tools close together and makes each result easy to copy or share.

What is live in phase 1?

• Age calculator for exact age and total days.
• Date calculator for adding or subtracting calendar days.
• Time duration calculator for elapsed hours and minutes.
• Hours calculator for net work or study hours.
• Percentage calculator for common percent questions.
• Grade calculator for points-based scores.
• GPA calculator for weighted grade-point averages.

Health and finance calculators are intentionally held until formula test vectors are reviewed. That keeps the first release reliable without linking to unfinished pages.