Date & Time Calculators

Date and time calculators for ages, date differences, and work duration estimates.

Age Calculator

Calculate age in years, months, and total months.

Calculate days, weeks, and approximate months between two dates.

Calculate elapsed time between two 24-hour times.

Count calendar days and weekdays between birth date and another date.

Count weekdays across a date range and subtract known holidays.

Estimate insurance age by adding an editable rounding adjustment to actual age.

Add or subtract days and months from a date.

Estimate workdays between two dates with an editable holiday count.

Count calendar days and weekdays across a date range.

Draft calendar notes and count words, characters, and lines.

Estimate daylight duration from sunrise and sunset times entered as decimal hours.