# Dates & Time Calculators

- **URL:** https://codeasystem.com/calculators/dates/
- **Markdown index:** https://codeasystem.com/calculators/dates/index.md
- **Calculators in this category:** 5

Date and time calculators for ages, days between dates, deadlines, business days and time durations.

Focus areas: Ages, durations, working days and date math.

## All calculators
- [Age Calculator](https://codeasystem.com/calculators/dates/age-calculator.md); Work out an exact age in years, months and days from a date of birth, plus total days and weeks lived, using precise calendar arithmetic.
- [Days Between Dates Calculator](https://codeasystem.com/calculators/dates/days-between-dates-calculator.md); Count the total days between two calendar dates, with a weeks-and-days breakdown and an optional inclusive count of both endpoints.
- [Date Add/Subtract Calculator](https://codeasystem.com/calculators/dates/date-add-subtract-calculator.md); Add or subtract days, weeks, months or years from any date and get the resulting calendar date in clean ISO format.
- [Working Days Calculator](https://codeasystem.com/calculators/dates/working-days-calculator.md); Count business days between two dates, excluding Saturdays and Sundays and subtracting any holidays you specify.
- [Time Duration Calculator](https://codeasystem.com/calculators/dates/time-duration-calculator.md); Measure the elapsed time between two clock times on the same day, shown as H:MM:SS plus decimal hours for timesheets.

Each link above points to the full Markdown reference for that calculator (inputs, formula, worked example, FAQs). The interactive HTML version lives at the same path without the `.md` suffix.

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Last updated: 2026-08-23 · [Section overview](https://codeasystem.com/calculators/index.md)