How do I calculate days between two dates?

Enter start and end date, choose inclusive if needed, and click Calculate. The tool shows total days and a full breakdown.

Can I exclude weekends or holidays?

Yes. Enable weekend exclusion and add custom excluded dates separated by commas or new lines.

Does it handle leap years and month variations?

Calculations are calendar-aware, accurately handling leap years, varying month lengths, and week boundaries.

Can I add or subtract a duration from a date?

Provide a base date and a duration in years, months, weeks, and days, then compute to get the target date.

What formats are supported for custom exclusions?

Use ISO format (YYYY-MM-DD) or natural language dates like Jan 1, 2025. Invalid tokens are safely ignored.

Date Calculator

Calculate the total days between two dates, get a precise breakdown by years, months, weeks, and days, optionally exclude weekends or custom dates, and add/subtract durations from a specific base date.

Start Date

End Date

Include both start and end dates

Exclude weekends (Saturday & Sunday)

Custom excluded dates (comma or newline separated)

Add or Subtract Duration from a Base Date

Base Date

Direction

Years

Months

Weeks

Days

What is a date calculator?

The pivotal role of a date calculator is to combine the differences in time between two dates. It also lets you increase or decrease the duration from a particular date to or from another date as desired. This helps you plan events, manage deadlines, or track important milestones with confidence.

The several features that a date calculator consists of include calculating leap years, customised dates excluding weekends, odd and even calendar dates, and month variations. These features make it an invaluable tool for planning events, managing deadlines, or simply tracking important milestones. By providing accurate calculations, a date calculator helps users make informed decisions about their schedules and commitments.

Examples

Days Between Two Dates: From 2025-01-01 to 2025-01-31 inclusive → 31 days.
Exclude Weekends: From 2025-02-01 to 2025-02-28, exclude weekends → adjusted days reflect only weekdays.
Add Duration: Base 2025-03-15 + 1 month, 2 weeks → result date computed precisely using calendar rules.

Date Calculator FAQ

Enter a start and end date, choose whether to include both dates, and click Calculate. The tool outputs total days and a detailed breakdown.

Yes. Toggle “Exclude weekends” and optionally enter custom excluded dates (e.g., public holidays) separated by commas or new lines.

Absolutely. Calculations use calendar-aware logic so leap days, different month lengths, and week boundaries are accurately handled.

Yes. Provide a base date and specify years, months, weeks, and days to add or subtract to compute the target date.

Enter ISO dates like 2025-01-01 or natural dates like Jan 1, 2025. Invalid entries are ignored safely.

Plan smarter with calendar-accurate date math

Our free Date Calculator provides precise calculations that mirror real-world calendars. From counting days between two milestones to adjusting schedules by adding or subtracting months and weeks, you get instant, reliable answers. Built for busy teams, students, and planners, this tool saves time and prevents mistakes caused by manual counting.

Use it to estimate project timelines, plan trips and events, track deadlines, or set reminders for recurring tasks. Weekend exclusion and custom holiday support make workday planning effortless. Leap years and month length variations are handled automatically so you can focus on your plans, not the math.