Category: Date & time
Date Difference Calculator
Count days, weeks, months and years between two dates
Choose two dates and calculate the absolute difference in days, weeks, months and years. The calculation runs in your browser.
Everything on this page is processed in your browser. Nothing is uploaded.
What this tool does
This date difference calculator is handy for deadlines, trips, subscriptions and planning notes. It uses date-only values so time zones do not shift the day count.
How to use it
- Pick a start date and an end date.
- Read the difference in days plus approximate weeks, months and years.
- Change either date to recalculate instantly.
Privacy
This tool runs entirely in your browser. Your input is never uploaded, stored or shared — closing the tab removes it.
Frequently asked questions
- Does this use a server clock?
- No. The calculation runs locally from the dates you enter.
- Are months and years exact?
- Days are exact. Months and years are approximate averages so they are easy to compare.
- Does order matter?
- No. The tool shows the absolute difference between the two dates.