Calculate Days

Calculate Date

Add number of days to a specific date with/without holidays/Weekends

Date Add Days Holidays/Weekends Country
Please enter a valid days, e.g. 10.
 {{resultDateAddDays}}
Caculate
Date Add Days
Please enter a valid days, e.g. 10.
Caculate
{{resultDateAddDays}}

Add number of weeks to a specific date

Date Add Weeks
Please enter a valid weeks, e.g. 10.
 {{resultDateAddWeeks}}
Caculate
Date Add Weeks
Please enter a valid weeks, e.g. 10.
Caculate
{{resultDateAddWeeks}}

Count how many days between two dates

Begining Date End Date Holidays/Weekends Country include beginning and end dates (1 day is added) {{resultDays}}
Caculate
Beginning Date End Date Include end date in calculation (1 day is added)
Caculate
{{resultDays}}

Caculate the number of weeks in a year for a given date

Date {{weekNumber}} {{totalWeeks}} {{remainingWeeks}}
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Date
Caculate
{{weekNumber}} {{totalWeeks}} {{remainingWeeks}}

What is Calculate Date?

Calculate Date is a powerful date calculator that helps you perform various date calculations quickly and accurately. Whether you need to add days or weeks to a specific date, count the days between two dates, or determine the week number within a year, this tool simplifies complex date arithmetic.

It supports options to exclude weekends and holidays from specific countries, making it ideal for business planning, project management, and personal scheduling.

How to Add Days to a Specific Date (With or Without Holidays/Weekends)

To add a specific number of days to a date:

  1. Select your starting date from the date picker.
  2. Enter the number of days you want to add (e.g., 10, 30, 90).
  3. Choose how to handle weekends and holidays:
    • All days – Counts every calendar day
    • Exclude weekends – Skips Saturdays and Sundays
    • Exclude major holidays – Skips public holidays for your selected country
    • Exclude weekends and major holidays – Skips both weekends and holidays
  4. If you selected a holiday exclusion option, choose your country from the dropdown.
  5. Click "Calculate" to see your result date.

This is particularly useful for calculating project deadlines, delivery dates, or business day counts.

How to Add Weeks to a Specific Date

To add a specific number of weeks to a date:

  1. Select your starting date from the date picker.
  2. Enter the number of weeks you want to add (e.g., 2, 4, 12).
  3. Click "Calculate" to instantly see the resulting date.

This feature is perfect for planning recurring events, calculating milestone dates, or scheduling regular intervals (e.g., "8 weeks from today").

How to Count Days Between Two Dates

To calculate the number of days between two dates:

  1. Select your beginning date from the first date picker.
  2. Select your end date from the second date picker.
  3. Choose your counting method:
    • All days – Counts all calendar days
    • Exclude weekends – Counts only weekdays (Monday through Friday)
    • Exclude major holidays – Excludes public holidays from the count
    • Exclude weekends and major holidays – Counts only business days
  4. If using holiday exclusion, select your country from the dropdown.
  5. Check the "include beginning and end dates" box if you want both boundary dates included in the count (adds 1 day to the result).
  6. Click "Calculate" to see the total number of days.

This is ideal for calculating vacation days, contract durations, age calculations, or time until an important event.

How to Calculate Week Numbers in a Year

To find the week number for a specific date within its year:

  1. Select any date from the date picker.
  2. Click "Calculate" to view:
    • The week number for your selected date (e.g., "Week 24 of 2025")
    • The total number of weeks in that year (52 or 53)
    • The number of remaining weeks until the end of the year

Week numbers are calculated using the ISO 8601 standard, which is widely used in business, logistics, and international scheduling. This feature is useful for fiscal planning, project timelines, and understanding your position within the year.