Time & calendar
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Calendar and scheduling math in one hub: add or subtract days, weeks, and months; count business weekdays between dates; convert weekly hours to full-time equivalent (FTE); look up ISO 8601 week numbers; and convert Unix epoch timestamps to readable dates. Cross-links to age, date difference, and time zone tools for everyday planning.
8 tools in this section
Date Add & Subtract
Add or subtract days, weeks, or months from any date. Free date calculator for deadlines, project planning, and scheduling.
Business Days
Count business days (Mon–Fri) between two dates. Free weekday calculator — excludes weekends, not public holidays.
Work Hours to FTE
Convert weekly work hours to full-time equivalent (FTE). Free FTE calculator for staffing, grants, and HR planning.
Week Number
Find the ISO 8601 week number for any date. Free week-of-year calculator for project planning and reporting.
Unix Timestamp
Convert Unix epoch timestamps to human-readable dates and back. Free timestamp converter for developers and log analysis.
Date Difference
Calculate days, weeks, and months between two dates. Free date calculator.
Age
Calculate exact age in years, months, and days from a birth date. Free age calculator.
Time Zone
Convert time between UTC offsets for travel and remote meetings. Does not adjust for DST.