Time Calculator
Six in-browser calculators for everyday date and time math. Compute the gap between two dates, add or subtract a duration, find your age in days, or convert a Unix timestamp — every tool runs locally in your browser.
Date-time difference
Returns the gap between two date-time values in days, hours, and minutes.
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Add or subtract a duration
Take a starting date-time and add (or subtract) days, hours, and minutes.
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Days between two dates
Whole-day count between two calendar dates, plus weeks and months breakdown.
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Age calculator
Years, months, and days from a birthdate to a target date.
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Hours and minutes
Add several HH:MM values together — useful for tracking work hours or training time.
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Unix timestamp converter
Convert between Unix seconds and a human-readable date.
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Related tools
More date and time utilities: converters, counters, and reference pages.
Time-zone converterCompare the same moment across multiple cities.Week numberCurrent ISO week, year context, and week ranges.CalendarYear and month reference pages.Unix time nowLive Unix timestamp and related formats.Event plannerSchedule and compare event times across cities.CountdownsTrack upcoming dates and events.