Date Calculator

How to Use This Calculator

Need to know how many days between two dates or find a date in the future? Our date calculator handles all date math:

1. Choose your calculation type: days between two dates, add days to a date, or subtract days from a date.
2. Enter your starting date using the date picker.
3. For date difference: enter the second date. For add/subtract: enter the number of days.
4. Click 'Calculate' to see the result, including breakdowns by weeks, months, and years where applicable.

Why This Matters

Date calculations come up more often than you might think - counting down to events, calculating project timelines, determining age, figuring out when bills are due, or planning vacations. While calendar math seems simple, accounting for varying month lengths, leap years, and weekends makes it surprisingly complex. A date calculator eliminates errors and saves time on these common but tricky calculations.

• Count down days to important events like weddings, trips, or deadlines
• Calculate exact time between dates for project planning
• Determine due dates and deadline dates accurately
• Figure out the date X days from now for scheduling
• Calculate age differences or time elapsed precisely

Worked Examples

Common Mistakes to Avoid

• Forgetting about leap years when calculating dates spanning February - every 4 years adds an extra day.
• Confusing 'days from today' with 'days including today' - clarify whether to count the start date.
• Not accounting for time zones when planning international events or deadlines.
• Assuming all months have 30 days - month lengths vary from 28-31 days.
• Mixing up business days (weekdays) with calendar days - 10 business days is typically 14 calendar days.