Date Calculator

Calculate the exact number of days, months and years between two dates, or add or subtract a number of days from a date to find a new date — all instantly in your browser.

How to Use Date Calculator

1. To find the difference between two dates: choose 'Days between two dates', pick a start and end date, and click Calculate.
2. To add or subtract days: choose 'Add or subtract days from a date', pick a date, choose Add or Subtract, enter the number of days, and click Calculate.

Key Features

• Calculates the difference between two dates in years, months and days
• Adds or subtracts any number of days from a date
• Works with past and future dates
• Runs entirely in your browser — no data leaves your device

Who It's Useful For

• Project managers calculating deadlines or durations
• Students and professionals tracking date ranges
• Anyone planning an event, trip or contract end date

Practical Examples

• Find out how many days are left until a deadline or event
• Calculate someone's exact time in a role from a start date to today
• Find the date 90 days from a contract's signing date

Tips for Better Results

• For the difference between dates, the order of start and end date doesn't matter — the tool always shows the positive difference
• Use 'Add or subtract days' to quickly find a due date, renewal date or anniversary
• The total-days figure is useful when you need an exact day count rather than years/months/days

FAQ

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