All calculators

Choose a calculator for work, pay, time zones, dates and days.

Calculate work hours, unpaid breaks, rounding and weekly overtime without sending your schedule to a server.

Estimate regular pay, overtime pay, premium-only amount and gross pay from known hours.

Convert hourly, daily, weekly, biweekly, monthly and annual pay using your work schedule.

Convert hours and minutes to decimal hours and convert decimal hours back to time.

Convert IANA time zones and find shared weekday working-time windows with DST-safe elapsed durations.

Add or subtract durations, compare times and sum multiple durations.

Count or add working days using weekend patterns and holiday dates you control.

Find calendar differences or add and subtract years, months, weeks and days.

Calculate exact calendar age, total days lived and the next birthday.

Track days until or since an event and save events locally in your browser.