Date Difference Calculator — Calculate Days Between Dates Online
Free online date difference calculator to find the exact number of days, weeks, months, and years between two dates. Add or subtract time from any date, calculate business days, and measure date intervals instantly.
Today: Monday, June 15, 2026
Quick Presets
Notable Dates
Duration
30 days
Total Duration
🔴 seconds update live
Working Days
Note: Does not account for public holidays
Summary
30 days (30 days)How to Use Date Difference Calculator
Select Start Date
Choose the beginning date using the date picker or type it in manually.
Select End Date
Pick the ending date to measure the difference between the two dates.
View Duration Details
See the difference in years, months, weeks, days, hours, minutes, and seconds with a full breakdown.
Try Add or Subtract
Switch to the Add/Subtract tab to add or subtract time (days, weeks, months, years) from any date.
Frequently Asked Questions
The calculator counts full 24-hour periods between dates. You can see both the total duration broken into years/months/days and the raw total days, hours, minutes, and seconds.
Yes, enable the Working Days toggle to exclude weekends (Saturday and Sunday) from the calculation. Note that public holidays are not automatically excluded.
Enter a base date, then specify an amount and unit (days, weeks, months, or years) to add or subtract. The result shows the new date instantly.
Yes, all date calculations automatically account for leap years, varying month lengths, and daylight saving time boundaries when calculating precise durations.
Notable dates provide quick references to historically significant dates like Unix Epoch, Y2K, 9/11, iPhone Launch, and future New Years. Click any to load it instantly.
Absolutely. Calculate the exact duration between two dates for project timelines, count down to events, or add/subtract time to schedule deadlines and milestones.
Try an Example
From
2024-01-01
To 2024-12-31 · 365 days · 52 weeks · 12 months
1 year · Weekdays: 261 · Weekend days: 104
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