Timestamp Converter
Convert Unix timestamps and ISO 8601 dates.
Date & Time
OpenDate Difference Calculator
Calculate the days between two dates, plus approximate weeks, months, and years for planning and timelines.
All processing happens locally in your browser. Your input is never sent to a server or saved by Wraplet.
Date difference
177 days
- Weeks
- 25.29
- Approx. months
- 5.82
- Approx. years
- 0.48
Formula or method
Total days = absolute difference between end date and start date
Weeks = total days / 7
Approximate months and years use average calendar lengths for quick planning estimates.
Inputs
Use any two valid dates. The calculator returns the absolute difference, so either date can come first.
Result
The main result is exact total days. Weeks, months, and years are shown as helpful approximations.
Use cases
- Plan project timelines, count days until an event, compare date ranges, or estimate elapsed time between milestones.
How to use
Enter the start date.
Enter the end date.
Review the total days plus approximate weeks, months, and years between the two dates.
Examples
Date Difference Calculator example
From January 1, 2026 to June 27, 2026 there are 177 days between the selected dates.
Start date 2026-01-01, end date 2026-06-27
177 days, 25.29 weeks, about 5.81 months, about 0.48 years
Frequently asked questions
Does the calculator include the start date?
It calculates the elapsed difference between the two dates. For example, January 1 to January 2 is 1 day.
Can I enter the later date first?
Yes. The result uses the absolute difference between the two dates.
Are months exact?
The day count is exact, while months and years are approximate because calendar months have different lengths.
Can I use this for deadlines?
Yes, as a planning aid. For official deadlines, confirm whether the rules count inclusive days, business days, weekends, or holidays.