Everyday Calculators

Useful tools for time, school, work, construction, networking, and security.

Find exact age in years, months, days, and total days lived.

Measure the duration between two dates and times.

Calculate total hours worked between a start and end time.

Calculate a weighted course grade across multiple categories.

Compute weighted GPA using course grades and credit hours.

Estimate cubic yards and bag counts for concrete projects.

Find subnet masks, broadcast addresses, and usable host counts.

Create strong random passwords with custom rules.

Compare and convert times across global time zones.