Date & Time Calculators
Find the time between life’s milestones. Every tool is free, with transparent formulas and worked examples.
Age Calculator
Find completed years and elapsed days between a birth date and another date.
Date & TimeDate Difference Calculator
Count elapsed calendar days and weeks between two dates.
Date & TimeHours Calculator
Count paid hours between two clock times, including breaks and an optional overnight shift.
Date & TimeTime Card Calculator
Build a weekly time card with breaks, configurable overtime and gross pay.
Date & TimeBusiness Days Calculator
Count working days with a chosen weekend pattern and your entered holiday dates.
Date & TimeAdd / Subtract Date Calculator
Move a calendar date by years, months, weeks and days with explicit month-end handling.
Date & TimeTime Zone Calculator
Convert a dated local clock time between IANA time zones and handle daylight-saving gaps or repeats.
Date & TimeTime Duration Arithmetic Calculator
Add or subtract signed durations without wrapping at midnight or limiting hours to a 24-hour clock.
Date & Time