Everyday Calculators

Useful tools for daily life — age, units, grades, work hours, concrete, networking, and security.

Find your exact age in years, months, and days.

Calculate the duration between two dates and times.

Calculate hours worked between a start and end time.

Compute weighted course grades across multiple categories.

Calculate cubic yards and bags needed for a concrete project.

Calculate subnet mask, network address, and usable hosts.

Generate secure random passwords with custom length and characters.

Convert time between world timezones with full DST support.