Date Calculator

Easily add or subtract days, weeks, months, or years from a specific date.

Easily add or subtract days, weeks, months, or years from a specific date. Our free Date Calculator is perfect for planning future events, calculating deadlines, or finding a date in the past.

Quick Actions

Calculator Mode

Advanced Options

Show Timezone

Exclude Public Holidays

Start Date

Selected

Select the starting date for your calculation —

Operation

Value (positive integer)

Max:

Unit

Number of Intervals (max 10)

Calculate multiple intervals (e.g., next 5 months)

Error

Birth Date

Enter your birth date to calculate your exact age

Your Age

, ,

Next Birthday

Total Days

Total Weeks

Total Months

Total Hours

Total Minutes

Born On

Fun Facts

Your heart has beaten approximately times!

You've slept approximately days

You've celebrated birthdays!

Earth has orbited the sun times!

Date Format

Result Date

Recurring Dates

Days

Weeks

Months

Years

Date Details

Day of Week

Day of Year

Week of Year

Quarter

Business Info

Business Days (Excluding Weekends)

days

Leap Year

Business Days (Excl. Holidays)

days

Excluded Public Holidays ( holidays)

Recent Calculations

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How to Use

Step-by-step guide 3 steps

1 Enter Start Date: Input the initial date from which you want to calculate.
2 Choose Operation: Select whether you want to "Add" or "Subtract" time.
3 Enter Time Value: Input the quantity (e.g., 30) and the unit (e.g., Days, Weeks, Months, Years). Click "Calculate Result" for the final date. Calculate a future date now!

FAQ

Common questions 3 questions

How does the tool handle leap years?

The Date Calculator automatically adjusts for leap years to ensure the final date is accurate.

Can I subtract months?

Yes, you can subtract months to easily determine a past date for financial or legal deadlines.

Does it include the start date in the calculation?

Calculations are typically non-inclusive of the start date when adding/subtracting time units.

Use Cases & Examples

Real-world applications 3 examples

Legal Deadlines

Calculate the exact date 90 days after a legal notice was served.

Subscription Management

Find the precise date a subscription will expire after 12 months.

Project Scheduling

Determine the exact finish date if a project runs for 45 working days.