Date Calculator

Overview

Calculate the span between two dates, total days, weeks, weekdays, and calendar years/months/days. You can also add or subtract years, months, weeks, and days from a start date without opening a spreadsheet.

Best for

• Counting days, weeks, and weekdays between two calendar dates.
• Checking a date duration in years, months, and days.
• Adding or subtracting calendar time for deadlines, renewals, follow-ups, and planning.

Not for

• Legal deadlines, payroll, billing, shipping guarantees, or compliance rules.
• Holiday-aware business calendars, time zones, time of day, or country-specific scheduling policies.

How it works

1. Choose days between dates or add/subtract time.
2. Enter the start date and the needed end date or offset.
3. Review total days, weekdays, calendar span, or the resulting date.

Limits and privacy

The calculator uses calendar dates. Weekdays exclude Saturday and Sunday only. It does not include public holidays, time zones, time of day, legal rules, payroll policies, or local business calendars.

Common uses

• Count how many days are between two project milestones.
• Estimate weekdays in a simple work timeline.
• Find the date 30, 60, or 90 days after a start date.
• Check a rough calendar duration before using a specialized scheduling tool.

Useful facts

• Tiny Work Tools Date Calculator runs locally in the browser.
• It supports date difference and date add/subtract modes in one tool.