მთავარი მიღებული
- 01Two modes: count the difference between two dates, or add/subtract days, weeks, months or years from a date.
- 02Business-day count is shown alongside calendar days — weekends excluded, but public holidays are not since they vary by country.
- 03Leap years and month-end edge cases are handled correctly using the browser's native date engine.
When Mental Date Math Falls Short
Counting days on a calendar works for a week or two, but it breaks down fast when the gap spans months, crosses year boundaries or needs to exclude weekends. Contract due dates, project deadlines, leave entitlements, pregnancy countdowns — all of these require accurate day counts that mental arithmetic can't reliably deliver.
Handytool's date calculator covers both everyday scenarios: figuring out how far apart two dates are, and figuring out what date you land on after shifting forward or back by a set amount. Both modes give you a clean breakdown so you always know exactly what you're looking at.
How to Use the Date Calculator
Pick the mode that matches your task.
- 01
Choose Difference or Add/Subtract
Switch to Difference mode to count the days between two dates, or Add/Subtract mode to find the date a set number of days, weeks, months or years away from a starting point.
- 02
Enter your dates
In Difference mode, pick a start date and an end date. In Add/Subtract mode, pick a start date, choose add or subtract, and enter an amount and unit.
- 03
Read the breakdown
Results include total days, total weeks, a calendar breakdown in years, months and days, the weekday of the result date, and — in Difference mode — the count of business days (Monday through Friday).
- 04
Adjust and reuse
Change any input and the result updates instantly. No need to reload or resubmit — useful for comparing multiple scenarios side by side.
Tasks This Calculator Handles Well
- 01Project due-date planning across weeks and months
- 02Contract notice-period calculations (e.g. 30 business days from today)
- 03Pregnancy milestone and trimester tracking
- 04Parental-leave or annual-leave entitlement calculations
- 05Countdowns to events, trips or retirement dates
Runs Entirely in Your Browser
The date calculator uses the browser's native date engine, which means leap years, month-end edge cases (like adding a month to January 31) and time zones are all handled correctly without any server call.
Nothing you enter is uploaded or stored. Handytool does not track the dates you calculate. The tool is free, requires no account and works on any device with a modern browser.
Date Calculator FAQ
How many days are between two dates?
Use Difference mode, choose the start and end dates, and the tool shows total days, weeks, business days and a calendar breakdown.
How do I add days to a date?
Switch to Add/Subtract mode, set a start date, choose Add and enter a number of days (or weeks, months or years). The result date and weekday appear instantly.
Does it count business days?
Yes. In Difference mode, the business-day count excludes weekends. Public holidays are not subtracted because they vary by country.
Does it handle leap years correctly?
Yes. The tool uses the browser's native date engine, which respects the Gregorian calendar including February 29 in leap years.
Are my dates sent to a server?
No. The date calculator runs entirely in your browser. Nothing you type is uploaded, logged or stored.
Is the date calculator free?
Yes. No account, no ads inside the tool and no usage limits — every Handytool is free.